refactored the code
This commit is contained in:
424
gui.py
424
gui.py
@ -1,5 +1,9 @@
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# This module handles the GUI of coin
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import pytesseract
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############################################################
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### Project: coin
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### File: gui.py
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### Description: handles the GUI of coin
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### Version: 1.0
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############################################################
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import cv2, os, sys
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from PIL import Image
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import PyQt6
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@ -9,161 +13,86 @@ from PyQt6.QtWidgets import *
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from PyQt6 import uic
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from PyQt6 import QtCore, QtGui, QtWidgets
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import glob
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import upc
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from upc import get_name_from_upc
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# [!!!] Change this if tesseract or coin can't find any data
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MODELS_PATH = '/usr/share/tessdata/'
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# [!!!] Sane values for scaling
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SCALE_MIN = 0.3
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SCALE_MAX = 4.0
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# How much (in decimal) to change the scale for every degree
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SCALE_DELTA = 8 * 360 * 1
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# [!!!] Sane values for recognition
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WIDTH_MIN = 10
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HEIGHT_MIN = 10
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# Column Information
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TABLE_COL_CNT = 5
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TABLE_COL_GET = 0
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TABLE_COL_DEL = 1
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TABLE_COL_UPC = 2
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TABLE_COL_NAME = 3
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TABLE_COL_PRICE = 4
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# Automatically finds all available language models
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models_list = glob.glob(MODELS_PATH + "*.traineddata")
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model_names = []
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for path in models_list:
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base_name = os.path.basename(path)
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base_name = os.path.splitext(base_name)[0]
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model_names.append(base_name)
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if len(model_names) == 0:
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print("No tesseract models found at", MODELS_PATH, "!", file=sys.stderr)
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sys.exit(0)
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from upc import *
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from constants import *
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import tess
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class UPCWorker(QObject):
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finished = pyqtSignal()
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update_name = pyqtSignal(list)
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def __init__(self, upcList):
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super().__init__()
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self.upcList = upcList
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# requires: upc_list is a list of list of two elements with the
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# first element being the UPC's row number and the second being a
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# string, containing the UPC
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def __init__(self, upc_lst):
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super().__init__()
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self.upc_lst = upc_lst
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# get_items_name(): get the names of all items using
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# get_name_from_upc from the list of upc_list. Emits a pair of
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# values stored in a list, the first element is the row number
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# and the second is the item's name
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def get_items_name(self):
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for upc in self.upcList:
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for upc in self.upc_lst:
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name = get_name_from_upc(upc[1])
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self.update_name.emit([upc[0], name])
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self.finished.emit()
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class coin_app(QtWidgets.QMainWindow):
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def __init__(self):
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class coin_gui(QtWidgets.QMainWindow):
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# requires: model_names must be valid and not empty
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def __init__(self, model_names):
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print("Initializing GUI...")
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QtWidgets.QMainWindow.__init__(self)
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self.ui = uic.loadUi('coin.ui', self)
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self.image = None
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self.ui.openButton.clicked.connect(self.open)
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self.ui.openButton.clicked.connect(self.open_image)
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self.ui.getNameButton.clicked.connect(self.get_all)
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self.ui.saveFileButton.clicked.connect(self.save_file)
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self.ui.saveDbButton.clicked.connect(self.save_database)
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self.rubberBand = QRubberBand(QRubberBand.Shape.Rectangle, self)
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self.rubber_band = QRubberBand(QRubberBand.Shape.Rectangle, self)
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self.ui.photo.setMouseTracking(True)
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self.ui.photo.installEventFilter(self)
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self.ui.photo.setAlignment(PyQt6.QtCore.Qt.AlignmentFlag.AlignTop)
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self.model = model_names[0]
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print("Model selected as:", self.model)
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self.models.addItems(model_names)
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self.models.currentTextChanged.connect(self.update_now)
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self.models.setCurrentIndex(model_names.index(self.model))
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self.image = None
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self.scale = 1.0
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self.items = None
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self.upcCheckTimer = QTimer(self)
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self.upcCheckTimer.timeout.connect(self.pushUPCToThread)
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self.upcCheckTimer.start(1500)
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if len(model_names) == 0:
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print("[ERR] No tesseract model given to coin_gui!", file=sys.stderr)
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sys.exit(1)
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self.model_names = model_names
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self.update_model(self.model_names[0])
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self.models.addItems(self.model_names)
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self.models.currentTextChanged.connect(self.update_model)
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self.models.setCurrentIndex(self.model_names.index(self.model))
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self.upc_chk_timer = QTimer(self)
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self.upc_chk_timer.timeout.connect(self.push_upc_to_thread)
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self.upc_chk_timer.start(1500)
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print("Initialized timer!")
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self.upcThread = QThread()
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self.upcWorker = None
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self.upcCheckList = []
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self.upc_thread = None
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self.upc_worker = None
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self.upc_chk_lst = []
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def pushUPCToThread(self):
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if len(self.upcCheckList) > 0 and self.upcWorker is None:
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self.upcWorker = UPCWorker(self.upcCheckList)
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self.upcWorker.moveToThread(self.upcThread)
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self.upcWorker.update_name.connect(self.updateItemName)
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self.upcWorker.finished.connect(self.collectUPCWorker)
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self.upcThread.finished.connect(self.collectUPCThread)
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self.upcThread.started.connect(self.upcWorker.get_items_name)
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self.upcThread.start()
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print("Lookup thread started!")
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self.upcCheckList = []
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def collectUPCWorker(self):
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self.upcWorker.deleteLater()
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self.upcWorker = None
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def collectUPCThread(self):
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self.upcThread.deleteLater()
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def updateItemName(self, name):
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itemName = QStandardItem(name[1])
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itemName.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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self.items.setItem(name[0], TABLE_COL_NAME, itemName)
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self.itemsTable.resizeColumnToContents(TABLE_COL_NAME)
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self.itemsTable.resizeRowToContents(name[0])
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def update_now(self, value):
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self.model = value
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print("Model selected as:", self.model)
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def set_table_header(self):
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item = QStandardItem(" Get ")
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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item.setEditable(False)
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self.items.setItem(0, TABLE_COL_GET, item)
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item = QStandardItem(" Del ")
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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item.setEditable(False)
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self.items.setItem(0, TABLE_COL_DEL, item)
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item = QStandardItem("UPC")
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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item.setEditable(False)
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self.items.setItem(0, TABLE_COL_UPC, item)
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item = QStandardItem("Item Name")
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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item.setEditable(False)
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self.items.setItem(0, TABLE_COL_NAME, item)
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item = QStandardItem("Price")
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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item.setEditable(False)
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self.items.setItem(0, TABLE_COL_PRICE, item)
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self.itemsTable.resizeColumnsToContents()
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def open(self):
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# open_image(): prompts to open an image, if an error occurrs, the
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# image within the photo view will not be updated, otherwise, the
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# image will be updated and stored in self.pixmap
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def open_image(self):
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filename = QFileDialog.getOpenFileName(self, 'Select File')
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if filename[0] == "":
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print("No file was selected or opened!")
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return None
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if self.items is not None:
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self.items.deleteLater()
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print("Opening file: ", filename[0])
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self.image = cv2.imread(str(filename[0]))
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if self.image is None:
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print("Error: image is empty!", file=sys.stderr)
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print("No file was opened!")
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return None
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frame = cv2.cvtColor(self.image, cv2.COLOR_BGR2RGB)
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@ -171,11 +100,12 @@ class coin_app(QtWidgets.QMainWindow):
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frame.strides[0], QImage.Format.Format_RGB888)
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self.pixmap = QPixmap.fromImage(image)
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self.ui.photo.setPixmap(self.pixmap)
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self.scale = 1.0
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print("Updated photo!")
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print("Photo scale set to:", self.scale)
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self.scale = SCALE_DEFAULT
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self.update_scale()
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if self.items is not None:
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self.items.deleteLater()
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self.items = QStandardItemModel()
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self.itemsTable.setModel(self.items)
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self.items.setColumnCount(TABLE_COL_CNT)
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@ -187,6 +117,8 @@ class coin_app(QtWidgets.QMainWindow):
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return None
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# save_file(): prompt to save a file, will write to the file in
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# .csv format
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def save_file(self):
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filename = QFileDialog.getSaveFileName(self, 'Select File')
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@ -203,53 +135,107 @@ class coin_app(QtWidgets.QMainWindow):
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print(name, file=out, end=", ")
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print(self.items.item(i,TABLE_COL_PRICE).text().replace("\n", " "),
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file=out)
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out.close()
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out.close()
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self.statusBar().showMessage("Saved to: " + filename[0])
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# save_database(): saves to a database
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def save_database(self):
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print("Not implemented!")
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def scale_update(self):
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# set_table_header(): sets the headers of the table when a new
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# image is opened
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def set_table_header(self):
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for i in range(TABLE_COL_CNT):
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item = QStandardItem(TABLE_HEADERS[i])
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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item.setEditable(False)
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self.items.setItem(0, i, item)
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self.itemsTable.resizeColumnsToContents()
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# update_scale(): update the image with the new scale
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def update_scale(self):
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self.ui.photo.setPixmap(self.pixmap.scaled(
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int(self.scale * self.pixmap.width()),
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int(self.scale * self.pixmap.height())))
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print("Photo scale set to:", self.scale)
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print("Photo scale set to:", self.scale)
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self.statusBar().showMessage("Photo scale set to: " + str(self.scale))
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def image_to_text(self, cropped_image):
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gray = cv2.cvtColor(cropped_image, cv2.COLOR_BGR2GRAY)
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gray = cv2.medianBlur(gray, 1)
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crop = Image.fromarray(gray)
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text = pytesseract.image_to_string(crop, lang=self.model).strip()
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print("Text selected:", text)
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return text
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# push_upc_to_thread(): runs a new thread when there are items in
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# self.upc_chk_lst and self.upc_thread is available
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def push_upc_to_thread(self):
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if len(self.upc_chk_lst) > 0 and self.upc_worker is None:
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self.upc_thread = QThread()
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self.upc_worker = UPCWorker(self.upc_chk_lst)
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self.upc_worker.moveToThread(self.upc_thread)
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def get_row(self):
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button = self.sender()
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row = self.itemsTable.indexAt(button.pos()).row()
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upc = self.items.item(row, TABLE_COL_UPC).text()
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self.upcCheckList.append([row, upc])
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print("Started getting name of UPC:", upc)
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self.statusBar().showMessage("Started getting name of UPC: " + upc)
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self.pushUPCToThread()
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self.upc_worker.update_name.connect(self.update_item_name)
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self.upc_worker.finished.connect(self.upc_thread.quit)
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self.upc_worker.finished.connect(self.delete_upc_worker)
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self.upc_thread.finished.connect(self.delete_upc_thread)
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self.upc_thread.started.connect(self.upc_worker.get_items_name)
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self.upc_thread.start()
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print("Lookup thread started!")
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self.upc_chk_lst = []
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# delete_upc_worker(): wrapper for self.upc_worker.deleteLater()
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def delete_upc_worker(self):
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self.upc_worker.deleteLater()
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self.upc_worker = None
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# delete_upc_thread(): wrapper for self.upc_thread.deleteLater()
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def delete_upc_thread(self):
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print("Lookup thread is finished!")
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self.upc_thread.deleteLater()
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# update_item_name(name): name is a two-element list with the
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# first element being the row in which is item is located, and
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# the second being a string containing the item's name
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def update_item_name(self, name):
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item = QStandardItem(name[1])
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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self.items.setItem(name[0], TABLE_COL_NAME, item)
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self.itemsTable.resizeColumnToContents(TABLE_COL_NAME)
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self.itemsTable.resizeRowToContents(name[0])
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# get_all(): get the names of items in every row that doesn't have
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# a name in it
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def get_all(self):
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for i in range(1, self.items.rowCount()):
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if self.items.item(i, TABLE_COL_NAME) is None or self.items.item(i, TABLE_COL_NAME).text() == "N/A":
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if (self.items.item(i, TABLE_COL_NAME) is None or
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self.items.item(i, TABLE_COL_NAME).text() == "N/A"):
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upc = self.items.item(i, TABLE_COL_UPC).text()
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print("Started getting name of UPC:", upc)
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self.statusBar().showMessage("Started getting name of UPC: " + upc)
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self.upcCheckList.append([i, upc])
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self.pushUPCToThread()
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self.upc_chk_lst.append([i, upc])
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self.push_upc_to_thread()
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# get_item_at_row(): get the name of the item at the row where the
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# "Get" button was clicked
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def get_item_at_row(self):
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button = self.sender()
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row = self.itemsTable.indexAt(button.pos()).row()
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upc = self.items.item(row, TABLE_COL_UPC).text()
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self.upc_chk_lst.append([row, upc])
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print("Started getting name of UPC:", upc)
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self.statusBar().showMessage("Started getting name of UPC: " + upc)
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self.push_upc_to_thread()
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# del_row(): delete the row where the "Del" button was clicked
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def del_row(self):
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button = self.sender()
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index = self.itemsTable.indexAt(button.pos())
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self.items.removeRow(index.row())
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print("Removed row", index.row())
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self.statusBar().showMessage("Removed row " + str(index.row()))
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# populate_buttons(): put buttons on the table when creating a new row
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def populate_buttons(self):
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del_button = QPushButton("Del")
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self.itemsTable.setIndexWidget(
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@ -261,17 +247,22 @@ class coin_app(QtWidgets.QMainWindow):
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self.itemsTable.setIndexWidget(
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self.items.index(self.items.rowCount() - 1, TABLE_COL_GET),
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get_button)
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get_button.clicked.connect(self.get_row)
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get_button.clicked.connect(self.get_item_at_row)
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# update_model(): update self.model to the one selected
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def update_model(self, value):
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self.model = value
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print("Model selected as:", self.model)
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# add_upc(text): adds a new row containing text in the UPC column
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def add_upc(self, text: str):
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if text == "":
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print("No text was recognized, will not add a new item!")
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return None
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self.statusBar().showMessage("Text selected: " + text)
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item = QStandardItem(text)
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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self.items.setItem(self.items.rowCount(), TABLE_COL_UPC, item)
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item = QStandardItem("N/A")
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item.setTextAlignment(Qt.AlignmentFlag.AlignCenter)
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self.items.setItem(self.items.rowCount() - 1, TABLE_COL_NAME, item)
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@ -280,69 +271,92 @@ class coin_app(QtWidgets.QMainWindow):
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self.items.setItem(self.items.rowCount() - 1, TABLE_COL_PRICE, item)
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self.populate_buttons()
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self.itemsTable.resizeColumnToContents(TABLE_COL_UPC)
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return None
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# eventFilter(source, event): handles a few things differently
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def eventFilter(self, source, event):
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# Handling the selection box
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if event.type() == QEvent.Type.MouseButtonPress and source is self.ui.photo:
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self.org = self.mapFromGlobal(event.globalPosition())
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self.top_left = event.position()
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self.rubberBand.setGeometry(QRect(self.org.toPoint(), QSize()))
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self.rubberBand.show()
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if (event.type() == QEvent.Type.MouseButtonPress and
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source is self.ui.photo):
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self.rubber_band_show(event)
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return True
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elif event.type() == QEvent.Type.MouseMove and source is self.ui.photo:
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if self.rubberBand.isVisible():
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pos = self.mapFromGlobal(event.globalPosition()).toPoint()
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pos = QPoint(int(max(pos.x(), 0)),
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int(max(pos.y(), 0)))
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self.rubberBand.setGeometry(
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QRect(self.org.toPoint(),
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pos).normalized())
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return True
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elif event.type() == QEvent.Type.MouseButtonRelease and source is self.ui.photo:
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pos = event.position()
|
||||
self.top_left = QPoint(int(max(min(pos.x(), self.top_left.x()), 0)),
|
||||
int(max(min(pos.y(), self.top_left.y()), 0)))
|
||||
if self.rubberBand.isVisible():
|
||||
self.rubberBand.hide()
|
||||
rect = self.rubberBand.geometry()
|
||||
self.x1 = int(self.top_left.x() / self.scale)
|
||||
self.y1 = int(self.top_left.y() / self.scale)
|
||||
width = rect.width() / self.scale
|
||||
height = rect.height() / self.scale
|
||||
self.x2 = int(self.x1 + width)
|
||||
self.y2 = int(self.y1 + height)
|
||||
else:
|
||||
return False
|
||||
if width >= WIDTH_MIN and height >= HEIGHT_MIN and self.image is not None:
|
||||
print("Cropped image:", self.x1, self.y1, self.x2, self.y2)
|
||||
self.crop = self.image[self.y1:self.y2, self.x1:self.x2]
|
||||
# cv2.imwrite("cropped.png", self.crop)
|
||||
self.text = self.image_to_text(self.crop)
|
||||
self.add_upc(self.text)
|
||||
##self.ui.textEdit()
|
||||
return True
|
||||
|
||||
# Resizing the photo
|
||||
elif event.type() == QEvent.Type.Wheel and self.image is not None and source is self.ui.photo:
|
||||
modifiers = QApplication.keyboardModifiers()
|
||||
if modifiers == Qt.KeyboardModifier.ControlModifier:
|
||||
self.scale = self.scale + event.angleDelta().y() / SCALE_DELTA
|
||||
if self.scale < SCALE_MIN:
|
||||
self.scale = SCALE_MIN
|
||||
if self.scale > SCALE_MAX:
|
||||
self.scale = SCALE_MAX
|
||||
self.scale_update()
|
||||
return True
|
||||
elif event.type() == QEvent.Type.MouseButtonDblClick and source is self.ui.photo:
|
||||
self.open()
|
||||
elif (event.type() == QEvent.Type.MouseMove and
|
||||
source is self.ui.photo and self.rubber_band.isVisible()):
|
||||
self.rubber_band_redraw(event)
|
||||
return True
|
||||
|
||||
elif (event.type() == QEvent.Type.MouseButtonRelease and
|
||||
source is self.ui.photo and self.rubber_band.isVisible()):
|
||||
return self.rubber_band_select(event)
|
||||
|
||||
elif (event.type() == QEvent.Type.Wheel and
|
||||
self.image is not None and source is self.ui.photo and
|
||||
QApplication.keyboardModifiers() ==
|
||||
Qt.KeyboardModifier.ControlModifier):
|
||||
self.image_resize(event)
|
||||
return True
|
||||
|
||||
elif (event.type() == QEvent.Type.MouseButtonDblClick and
|
||||
source is self.ui.photo):
|
||||
self.open_image()
|
||||
return True
|
||||
|
||||
return False
|
||||
|
||||
app = QtWidgets.QApplication(sys.argv)
|
||||
mainWindow = coin_app()
|
||||
mainWindow.show()
|
||||
sys.exit(app.exec())
|
||||
# rubber_band_show(event): shows the rubber band for selection
|
||||
def rubber_band_show(self, event):
|
||||
self.org = self.mapFromGlobal(event.globalPosition())
|
||||
self.top_left = event.position()
|
||||
self.rubber_band.setGeometry(QRect(self.org.toPoint(), QSize()))
|
||||
self.rubber_band.show()
|
||||
|
||||
# rubber_band_redraw(event): resizes the rubber band for selection
|
||||
def rubber_band_redraw(self, event):
|
||||
pos = self.mapFromGlobal(event.globalPosition()).toPoint()
|
||||
pos = QPoint(int(max(pos.x(), 0)),
|
||||
int(max(pos.y(), 0)))
|
||||
self.rubber_band.setGeometry(
|
||||
QRect(self.org.toPoint(),
|
||||
pos).normalized())
|
||||
|
||||
# rubber_band_select(event): processes the rubber band for selection
|
||||
def rubber_band_select(self, event):
|
||||
pos = event.position()
|
||||
self.top_left = QPoint(int(max(min(pos.x(), self.top_left.x()), 0)),
|
||||
int(max(min(pos.y(), self.top_left.y()), 0)))
|
||||
|
||||
self.rubber_band.hide()
|
||||
rect = self.rubber_band.geometry()
|
||||
self.x1 = int(self.top_left.x() / self.scale)
|
||||
self.y1 = int(self.top_left.y() / self.scale)
|
||||
width = rect.width() / self.scale
|
||||
height = rect.height() / self.scale
|
||||
self.x2 = int(self.x1 + width)
|
||||
self.y2 = int(self.y1 + height)
|
||||
|
||||
if (width >= WIDTH_MIN and height >= HEIGHT_MIN and
|
||||
self.image is not None):
|
||||
print("Cropped image:", self.x1, self.y1, self.x2, self.y2)
|
||||
crop = self.image[self.y1:self.y2, self.x1:self.x2]
|
||||
|
||||
text = tess.image_to_text(self.model, crop)
|
||||
print("Text selected:", text)
|
||||
self.statusBar().showMessage("Text selected: " + text)
|
||||
self.add_upc(text)
|
||||
return True
|
||||
|
||||
return False
|
||||
|
||||
# image_resize(event): resize the image when scrolling with Ctrl
|
||||
def image_resize(self, event):
|
||||
self.scale = self.scale + event.angleDelta().y() / SCALE_DELTA
|
||||
|
||||
if self.scale < SCALE_MIN:
|
||||
self.scale = SCALE_MIN
|
||||
|
||||
if self.scale > SCALE_MAX:
|
||||
self.scale = SCALE_MAX
|
||||
|
||||
self.update_scale()
|
||||
|
||||
Reference in New Issue
Block a user