Image processing device and method for performing quality optimized deblocking

A deblocking method for deblocking a block edge between a first block and a second block of an image, the method comprising:

• generating filtered pixel values from original pixel values of pixels, wherein the pixels comprise at least two decision pixels in a decision pixel line and at least one non-decision pixel in a non-decision pixel line, the filtered pixel values including at least two filtered decision pixel values and at least one filtered non-decision pixel value;
• clipping the filtered pixel values, wherein the at least two filtered decision pixel values of the at least two decision pixels are clipped using a first clipping value, and the at least one filtered non-decision pixel value of the at least one non-decision pixel is clipped using a second clipping value that depends upon a distance of a first pixel from the block edge.

A non-transitory computer-readable media storing computer instructions that configure at least one processor, upon execution of the instructions, to perform the following steps:

• generate filtered pixel values from original pixel values of pixels, wherein the pixels comprise at least two decision pixels in a decision pixel line and at least one non-decision pixel in a non-decision pixel line, the filtered pixel values including at least two filtered decision pixel values and at least one filtered non-decision pixel value;
• clip the filtered pixel values, wherein the at least two filtered decision pixel values of the at least two decision pixels are clipped using a first clipping value, and the at least one filtered non-decision pixel value of the at least one non-decision pixel is clipped using a second clipping value that depends upon a distance of a first pixel from a block edge between two blocks.