Blurs an image using the box filter.
- anchor_in – Anchor point.
- borderType_in – Pixel extrapolation method, see cv::BorderTypes
- ddepth_in – The output image depth.
- image_in – Input image.
- ksize_in – Blurring kernel size.
- normalize_in – Flag, specifying whether the kernel is normalized by its area or not.
- image_out – Output image.
