ImageWithOpenCV.py 文件源码

def open(self, filename):
        p = self.preferences
        # open in 8 bit?
        if p.p8bit.value():
            col = 0
        else:
            col = cv2.IMREAD_ANYDEPTH
        if p.pGrey.value() and not p.pSplitColors.value():
            col = col | cv2.IMREAD_GRAYSCALE
        else:
            col |= cv2.IMREAD_ANYCOLOR

        # OPEN
        img = cv2.imread(str(filename), col)  # cv2.IMREAD_UNCHANGED)
        if img is None:
            raise Exception("image '%s' doesn't exist" % filename)

        # crop
        if p.pCrop.value():
            r = (p.pCropX0.value(),
                 p.pCropX1.value(),
                 p.pCropY0.value(),
                 p.pCropY1.value())
            img = img[r[0]:r[1], r[2]:r[3]]

        # resize
        if p.pResize.value():
            img = cv2.resize(img, (p.pResizeX.value(), p.pResizeY.value()))

        labels = None
        if img.ndim == 3:
            if p.pSplitColors.value():
                img = np.transpose(img, axes=(2, 0, 1))
                labels = ['blue', 'green', 'red']
            else:
                # rgb convention
                img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

        # change data type to float
        img = self.toFloat(img)
        return img, labels