crop the image

Mahdi_2020

My crop function works fine when the photo is in normal mode, but when I zoom in or zoom out and want to crop, it does the crop on the original image.

SGaist

Hi and welcome to devnet,

Without your code it's not possible to know what you did wrong beside the fact that your are changing the original image rather than applying your changes to the current image.

Mahdi_2020

@SGaist
code_text

@Slot()
    def zoom_in(self):
        self.scale = self.scale + 0.1
        root_object.findChild(QObject, "image").setProperty("scale", self.scale)
        new_height, new_width = int(self.image.shape[0] * self.scale), int(self.image.shape[1] * self.scale)
        self.modified_image = cv2.resize(self.image, (new_width, new_height))
        self.update_qml()


@Slot()
    def zoom_out(self):
        if self.scale > 1.0:
            self.scale -= 0.1
            root_object.findChild(QObject, "image").setProperty("scale", self.scale)
            new_height, new_width = int(self.image.shape[0] * self.scale), int(self.image.shape[1] * self.scale)
            self.modified_image = cv2.resize(self.image, (new_width, new_height))
            self.update_qml()

@Slot(int, int, int, int)
    def crop(self, x, y, width, height):
        if self.modified_image is not None:
            img_height, img_width = self.modified_image.shape[:2]
            qml_image = root_object.findChild(QObject, "image")
            qml_image_width = qml_image.property("width")
            qml_image_height = qml_image.property("height")
            aspect_ratio_image = img_width / img_height
            aspect_ratio_qml = qml_image_width / qml_image_height

            if aspect_ratio_image > aspect_ratio_qml:
                scale = qml_image_width / img_width
                offset_y = (qml_image_height - img_height * scale) / 2
                real_x = int(x / scale)
                real_y = int((y - offset_y) / scale)
            else:
                scale = qml_image_height / img_height
                offset_x = (qml_image_width - img_width * scale) / 2
                real_x = int((x - offset_x) / scale)
                real_y = int(y / scale)

            real_width = int(width / scale)
            real_height = int(height / scale)

            if real_x < 0 or real_y < 0 or real_x + real_width > img_width or real_y + real_height > img_height:
                print("Error: Cropping area is out of bounds!")

jsulm

@Mahdi_2020 Please format your code properly...

SGaist

Where in that code is the cropping done ?