Python版Halcon图像转OpenCV图像

新版本的Halcon支持Python接口，Python函数和Halcon函数名完全相同，用python写更容易一些。

def Halcon2OpenCV(filename, output_filename):
    image = ha.read_image(filename)
    image_converted = ha.convert_image_type(image, 'byte')
    channel_num_list = ha.count_channels(image_converted)
    # not like the C++, no pointer in Python
    # img_pointer, img_type, img_width, img_height = ha.get_image_pointer1(image_converted)
    img_width_list, img_height_list = ha.get_image_size(image_converted)
    new_img = np.empty((img_height_list[0], img_width_list[0], channel_num_list[0]), dtype=np.uint8)

    for j in range(img_width_list[0]):
        for i in range(img_height_list[0]):
            img_gray_value = ha.get_grayval(image_converted, i, j)
            if channel_num_list[0] == 1:
                new_img[i][j][0] = img_gray_value[0]
            else:
                if channel_num_list[0] == 3:
                    new_img[i][j][0] = img_gray_value[2]
                    new_img[i][j][1] = img_gray_value[1]
                    new_img[i][j][2] = img_gray_value[0]          
                           
    cv2.imwrite(output_filename, new_img)
    return new_img

比较坑的一点是get_image_pointer1返回的是指针，不知道如何找到图片对象，只能一个字节一个字节的复制了，效率比较低