Image processing method, device, and virtual reality display apparatus

An image processing device, comprising:

• a processor;
• and
• a first memory, wherein the first memory stores instructions which, when executed by the processor, causes the processor to perform the an image processing method, wherein the method comprises:
• determining a to-be-buffered image size according to a size of an input image and anti-distortion parameters of the lens unit;
• and
• generating, based on the input image and the anti-distortion parameters, an anti-distortion buffer image having an image size according to the to-be-buffered image size,
• wherein the determining a to-be-buffered image size according to a size of an input image and anti-distortion parameters of the lens unit comprises:
• determining an anti-distortion grid for the input image based on the anti-distortion parameters, and coordinate values of four vertices of an anti-distortion image on the anti-distortion grid determined by using a center of the input image as an origin, and determining absolute values of the coordinate values of the four vertices in a column direction respectively;
• determining a minimum absolute value Y among absolute values of the coordinate values of the four vertices in the column direction;
• and
• determining the to-be-buffered image size according to the minimum absolute value Y;
• and
• the image processing device further comprises a second memory configured to store a portion of the anti-distortion image.