# This module handles the GUI of coin import pytesseract import cv2, os, sys from PIL import Image import PyQt6 from PyQt6.QtGui import * from PyQt6.QtCore import * from PyQt6.QtWidgets import * from PyQt6 import uic from PyQt6 import QtCore, QtGui, QtWidgets import glob # [!!!] Change this if tesseract or coin can't find any data MODELS_PATH = '/usr/share/tessdata/' # [!!!] Sane values for scaling SCALE_MIN = 0.3 SCALE_MAX = 4.0 # How much (in decimal) to change the scale for every degree SCALE_DELTA = 8 * 360 * 1 # [!!!] Sane values for recognition WIDTH_MIN = 10 HEIGHT_MIN = 10 # Automatically finds all available language models models_list = glob.glob(MODELS_PATH + "*.traineddata") model_names = [] for path in models_list: base_name = os.path.basename(path) base_name = os.path.splitext(base_name)[0] model_names.append(base_name) if len(model_names) == 0: print("No tesseract models found at", MODELS_PATH, "!", file=sys.stderr) sys.exit(0) class coin_app(QtWidgets.QMainWindow): def __init__(self): QtWidgets.QMainWindow.__init__(self) self.ui = uic.loadUi('coin.ui', self) self.image = None self.ui.openButton.clicked.connect(self.open) self.rubberBand = QRubberBand(QRubberBand.Shape.Rectangle, self) self.ui.photo.setMouseTracking(True) self.ui.photo.installEventFilter(self) self.ui.photo.setAlignment(PyQt6.QtCore.Qt.AlignmentFlag.AlignTop) self.model = model_names[0] print("Model selected as:", self.model) self.models.addItems(model_names) self.models.currentTextChanged.connect(self.update_now) self.models.setCurrentIndex(model_names.index(self.model)) self.items = QStandardItemModel() self.itemsTable.setModel(self.items) self.items.setColumnCount(1) self.scale = 1.0 def update_now(self, value): self.model = value print("Model selected as:", self.model) def open(self): filename = QFileDialog.getOpenFileName(self, 'Select File') print("Opening file: ", filename[0]) self.image = cv2.imread(str(filename[0])) if self.image.size == 0: print("Error: image is empty!", file=sys.stderr) frame = cv2.cvtColor(self.image, cv2.COLOR_BGR2RGB) image = QImage(frame, frame.shape[1], frame.shape[0], frame.strides[0], QImage.Format.Format_RGB888) self.pixmap = QPixmap.fromImage(image) self.ui.photo.setPixmap(self.pixmap) self.scale = 1.0 print("Updated photo!") print("Photo scale set to:", self.scale) def scale_update(self): self.ui.photo.setPixmap(self.pixmap.scaled( int(self.scale * self.pixmap.width()), int(self.scale * self.pixmap.height()))) print("Photo scale set to:", self.scale) def image_to_text(self, cropped_image): gray = cv2.cvtColor(cropped_image, cv2.COLOR_BGR2GRAY) gray = cv2.medianBlur(gray, 1) crop = Image.fromarray(gray) text = pytesseract.image_to_string(crop, lang=self.model) print("Text selected:", text) return text def eventFilter(self, source, event): # Handling the selection box if event.type() == QEvent.Type.MouseButtonPress and source is self.ui.photo: self.org = self.mapFromGlobal(event.globalPosition()) self.top_left = event.position() self.rubberBand.setGeometry(QRect(self.org.toPoint(), QSize())) self.rubberBand.show() return True elif event.type() == QEvent.Type.MouseMove and source is self.ui.photo: if self.rubberBand.isVisible(): pos = self.mapFromGlobal(event.globalPosition()).toPoint() pos = QPoint(int(max(pos.x(), 0)), int(max(pos.y(), 0))) self.rubberBand.setGeometry( QRect(self.org.toPoint(), pos).normalized()) return True elif event.type() == QEvent.Type.MouseButtonRelease and source is self.ui.photo: 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.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() return True return False app = QtWidgets.QApplication(sys.argv) mainWindow = coin_app() mainWindow.show() sys.exit(app.exec())