PyQtでグラフを読み取れるアプリを作った。
グラフの画像をCtrl+Vでペーストし、その座標をクリックすると画素値からグラフの値を教えてくれる。
最初に右クリックで左下と右上の座標を教える必要がる。
なんでこんなんがいるかって、世の中紙でデータを保存する人がまだいるということである。
(OpenCVは使っていない)
from PyQt4 import QtGui, QtCore, QtCore
import sys
import cv2
import numpy as np
def convert_array_to_qimg(cv_img):
"""
this is based on https://stackoverflow.com/questions/18676888/how-to-configure-color-when-convert-numpy-array-to-qimage
"""
height, width, bytesPerComponent = cv_img.shape
bytesPerLine = bytesPerComponent * width;
#cv2.cvtColor(cv_img, cv2.CV_BGR2RGB)
return QtGui.QImage(cv_img.data, width, height, bytesPerLine, QtGui.QImage.Format_RGB888)
class GraphCoordinate:
def __init__(self):
pass
def setBottomPixelCoordinate(self, x1, y1):
"""
x1 and y1 are pixel
"""
self.x1 = x1
self.y1 = y1
def setBottomGraphCoordinate(self, X1, Y1):
self.X1 = X1
self.Y1 = Y1
print "(X1, Y1) = (%.2f, %.2f)" % (self.X1, self.Y1)
def setTopPixelCoordinate(self, x2, y2):
self.x2 = x2
self.y2 = y2
def setTopGraphCoordinate(self, X2, Y2):
self.X2 = X2
self.Y2 = Y2
print "(X2, Y2) = (%.2f, %.2f)" % (self.X2, self.Y2)
def getGraphCoordinate(self, x, y):
w = x - self.x1
h = self.y1 - y
W = self.x2 - self.x1
H = self.y1 - self.y2
X = self.X1 + w * (self.X2 - self.X1) / float(W)
Y = self.Y1 + h * (self.Y2 - self.Y1) / float(H)
return X, Y
class MainWindow(QtGui.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.image_frame = QtGui.QLabel()
fname = r"sample08.png"
img = cv2.imread(fname)
#img = QtGui.QImage(fname)
qimg = convert_array_to_qimg(img)
self.image_frame.setPixmap(QtGui.QPixmap.fromImage(qimg))
self.clip = QtGui.QApplication.clipboard()
self.setCentralWidget(self.image_frame)
self.move(30,30)
self.counter = 0
self.coord = GraphCoordinate()
def keyPressEvent(self, e):
if (e.modifiers() & QtCore.Qt.ControlModifier):
#selected = self.table.selectedRanges()
if e.key() == QtCore.Qt.Key_V:#past
qimg = self.clip.image()
self.displayImage(qimg)
elif e.key() == QtCore.Qt.Key_C: #copy
pass
def mousePressEvent(self, e):
#print e.x(), e.y()
if e.button() == QtCore.Qt.RightButton:
if self.counter % 2 == 0:
text, ok = QtGui.QInputDialog.getText(self, 'Input Dialog',
'Enter X1, Y1 (comma separated):')
X1, Y1 = [float(v) for v in text.split(',')]
if ok:
self.counter += 1
self.coord.setBottomPixelCoordinate(e.x(), e.y())
self.coord.setBottomGraphCoordinate(X1, Y1)
else:
text, ok = QtGui.QInputDialog.getText(self, 'Input Dialog',
'Enter X2, Y2 (comma separated):')
X2, Y2 = [float(v) for v in text.split(',')]
if ok:
self.coord.setTopPixelCoordinate(e.x(), e.y())
self.coord.setTopGraphCoordinate(X2, Y2)
self.counter = 0
elif e.button() == QtCore.Qt.LeftButton:
try:
x, y = self.coord.getGraphCoordinate(e.x(), e.y())
print "%.5f %.5f" % (x, y)
except AttributeError as e:
print "please set the graph coordinate by right clicks."
def displayImage(self, qimg):
self.image_frame.setPixmap(QtGui.QPixmap.fromImage(qimg))
def main(args):
app = QtGui.QApplication(sys.argv)
form = MainWindow()
form.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main(sys.argv)
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