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ui.py
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ui.py
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import sys
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QImage, QPixmap, QPainter, QPen, qRed, QColor
from PyQt5.QtWidgets import QApplication, QWidget, QGridLayout, QPushButton, QLabel
import numpy
import utils
class ImageLabel(QLabel):
def image(self):
qImage = self.pixmap().toImage()
img = numpy.zeros((qImage.height(), qImage.width()), dtype="int32")
for j in range(qImage.height()):
for i in range(qImage.width()):
gray = qRed(qImage.pixel(i, j))
img[j][i] = gray
return img
def setImage(self, img):
qImage = QImage(img.shape[1], img.shape[0], QImage.Format_RGB888)
for j in range(qImage.height()):
for i in range(qImage.width()):
gray = img[j][i]
qImage.setPixelColor(i, j, QColor(gray, gray, gray))
qPixmap = QPixmap(qImage)
self.setPixmap(qPixmap)
class DigitLabel(ImageLabel):
def __init__(self):
super().__init__()
self.x_old = None
self.y_old = None
self.factor = 10
self.size = 200
self.qPenSize = 10
self.resetImage()
def resetImage(self):
image = numpy.zeros((self.size, self.size), dtype="int32")
self.setImage(image)
def mousePressEvent(self, event):
self.x_old = event.x()
self.y_old = event.y()
def mouseMoveEvent(self, event):
qPen = QPen(QColor(255, 255, 255), self.qPenSize, Qt.SolidLine)
qPainter = QPainter()
qPainter.begin(self.pixmap())
qPainter.setPen(qPen)
qPainter.drawLine(self.x_old, self.y_old, event.x(), event.y())
qPainter.end()
self.update()
self.x_old = event.x()
self.y_old = event.y()
def build(model):
def classify(event=None):
nonlocal digit_label, prepro_digit_labels, classif_labels, model
img = digit_label.image()
imgs = utils.preprocess(img)
for i, img in enumerate(imgs):
prepro_digit_labels[i].setImage(img)
x = utils.format_x([imgs[-1]])
y = model.predict(x)
distr = y[0]
claz = numpy.argmax(distr)
for i, (class_label, proba_label) in enumerate(classif_labels):
if i == claz:
class_label.setStyleSheet("background-color: orange; padding: 2px 3px")
proba_label.setStyleSheet("background-color: orange; padding: 2px 3px")
else:
class_label.setStyleSheet("background-color: white; padding: 2px 3px")
proba_label.setStyleSheet("background-color: white; padding: 2px 3px")
percentage = round(distr[i]*100, 1)
proba_label.setText(str(percentage)+"%")
def reset():
nonlocal digit_label
digit_label.resetImage()
classify()
app = QApplication(sys.argv)
digit_grid = QGridLayout()
digit_label = DigitLabel()
digit_label.mouseReleaseEvent = classify
digit_grid.addWidget(digit_label, 0, 0, utils.NUM_PROCESS_STEPS, 1, Qt.AlignCenter)
prepro_digit_labels = []
for i in range(utils.NUM_PROCESS_STEPS):
row = i
prepro_digit_label = ImageLabel()
digit_grid.addWidget(prepro_digit_label, row, 1, Qt.AlignCenter)
prepro_digit_labels.append(prepro_digit_label)
reset_button = QPushButton("Reset")
reset_button.clicked.connect(reset)
classif_grid = QGridLayout()
classif_labels = []
for i in range(utils.NUM_CLASSES):
class_label = QLabel(str(i))
class_label.setStyleSheet("padding: 2px 4px")
classif_grid.addWidget(class_label, i, 0, Qt.AlignCenter)
proba_label = QLabel()
classif_grid.addWidget(proba_label, i, 1, Qt.AlignCenter)
classif_labels.append([class_label, proba_label])
reset()
grid = QGridLayout()
grid.addLayout(digit_grid, 0, 0)
grid.addWidget(reset_button, 1, 0)
grid.addLayout(classif_grid, 2, 0)
w = QWidget()
w.setWindowTitle("Digit classifier")
w.setLayout(grid)
w.show()
sys.exit(app.exec_())