Image processing device and method

An image processing method, comprising:

• selecting, according to a prediction mode when performing intra prediction on a pixel of an object block to be an object of encoding processing by using an image subjected to encoding processing as the object, whether to shift a phase of an adjacent pixel to be referenced when performing the intra prediction on the pixel of the object block or not to shift the phase of the adjacent pixel;
• and
• performing the intra prediction on the pixel of the object block by using the adjacent pixel,
• wherein, the selection of whether to shift the phase of an adjacent pixel includes selecting, according to a direction of the prediction mode when performing the intra prediction, whether to shift a phase of an upper adjacent pixel adjacent to an upper portion of the object block along a horizontal direction or to shift a phase of a left adjacent pixel adjacent to a left portion of the object block along a vertical direction,
• wherein, the selection of whether to shift the phase of an adjacent pixel includes, when the direction of the prediction mode includes only the horizontal direction, selecting to shift the phase in the vertical direction of the left adjacent pixel adjacent to the left portion of the object block.

A non-transitory computer-readable medium having embodied thereon a program, which when executed by a computer causes the computer to execute a method, the method comprising:

• selecting, according to a prediction mode when performing intra prediction on a pixel of an object block to be an object of encoding processing by using an image subjected to encoding processing as the object, whether to shift a phase of an adjacent pixel to be referenced when performing the intra prediction on the pixel of the object block or not to shift the phase of the adjacent pixel;
• and
• performing the intra prediction on the pixel of the object block by using the adjacent pixel,
• wherein, the selection of whether to shift the phase of an adjacent pixel includes selecting, according to a direction of the prediction mode when performing the intra prediction, whether to shift a phase of an upper adjacent pixel adjacent to an upper portion of the object block along a horizontal direction or to shift a phase of a left adjacent pixel adjacent to a left portion of the object block along a vertical direction,
• wherein, the selection of whether to shift the phase of an adjacent pixel includes, when the direction of the prediction mode includes only the horizontal direction, selecting to shift the phase in the vertical direction of the left adjacent pixel adjacent to the left portion of the object block.