Patent ID: 8456687
Filing Date: 2013-06-04
Classification: G06T,H04N

Abstract:
1. An image data processing apparatus comprising: a first memory for use in storing compressed image data; a second memory for use in storing a portion of the image data which has been decompressed and rotated; a third memory for use in storing an entirety of the image data which has been decompressed, rotated, and re-compressed; a segmentation number decision unit constructed to decide a number of image data segments for the image data based on (i) a data size obtained by decompressing the image data stored in the first memory and (ii) the capacity of the second memory; a decompression unit constructed to decompress the image data read out from the first memory and to repeat an operation of outputting one of the image data segments obtained by segmenting the decompressed image data into the decided number of image data segments and of discarding the rest of the image data segments, thereby sequentially outputting the decided number of the image data segments one by one; a rotation unit constructed to sequentially perform a rotation process on the image data segments output from the decompression unit, and to sequentially store the rotated image data segments in the second memory; and a compression unit constructed to compress the rotated image data segments read out from the second memory and to store the rotated and compressed image data segments in the third memory, wherein in sequentially outputting the image data segments one by one, the decompression unit outputs a next one of the image data segments after the rotated and compressed image data segment originating from a previously output one of the image data segments is stored in the third memory by the compression unit.