A memory access method for processing images includes reading an image data from a main memory. The image data has display rows. Inner memories are configured to be memory blocks arranged in an order of data storage. First pixel data in an ith display row are written into the memory blocks in the order of data storage, and N dummy data are written into the memory blocks in the order of data storage to form an isolated block. M dummy data are written into the memory blocks after the isolated block in the order of data storage to form a first shifted block. Second pixel data in an (i+1)th display row are written into the memory blocks after the first shifted block in the order of data storage, and O dummy data are written into the memory blocks in the order of data storage to form a second shifted block.