JP2007074412A5 - - Google Patents

Claims (11)

  In the image processing apparatus comprising storage means for holding input image information, a one-dimensional block data format converter for converting the data format of the input image information, and an image processing unit for processing raster data, the one-dimensional block data The format converter includes a unit that blocks input image information in units of a plurality of pixels in the line direction and performs fixed-length compression, a unit that blocks attribute information of the input image information in units of blocks in the same line direction, and a compressed image An image processing apparatus comprising: means for packing information and attribute information for each block and storing them in the storage means.   The image processing apparatus according to claim 1, further comprising: a packing data decoding rotator that decodes and rotates the packed data; and a block-raster converter that converts block data into raster data.   The packing data decoding rotator is configured to generate a fixed-length compressed image and data in which attribute information is packed for each block of a plurality of pixels in the line direction, generating an address rotated by 90 ° for each block in the line direction, and rotation 3. The apparatus according to claim 2, further comprising means for reading a block of a plurality of pixels in the line direction from the storage means by one memory read access according to the address, and means for decoding the read data into a square block. Image processing apparatus.   The image processing apparatus according to claim 1, further comprising a packing data rotator that rotates the packed data and a packing data decoder that decodes the packed data.   The packing data rotator is configured to generate a fixed-length compressed image and attribute information that is packed for each block of a plurality of pixels in the line direction, and a means for generating an address rotated by 90 ° for each block in the line direction. 5. The image processing apparatus according to claim 4, further comprising means for reading a block of a plurality of pixels in the line direction from the storage means by one memory read access according to an address.   The packing data rotator is configured to generate a fixed-length compressed image and attribute information that is packed for each block of a plurality of pixels in the line direction, and a means for generating an address rotated by 90 ° for each block in the line direction. 5. The image processing apparatus according to claim 4, further comprising means for writing a block of a plurality of pixels in the line direction to the storage means by one memory write access according to an address.   The image processing apparatus according to claim 1, wherein the input image information is uncompressed image information.   The image processing apparatus according to claim 1, wherein the input image information is variable length compressed image information or fixed length compressed image information.   Storage means for holding the input image information; means for blocking the input image information in units of a plurality of pixels in the line direction; and fixed length compression; means for blocking attribute information of the input image information in units of the same line direction; and compression An image format conversion module comprising: means for packing the image information and attribute information for each block and storing them in the storage means.   Receive and store the input image information, block the input image information in units of multiple pixels in the line direction and compress the fixed length, block the attribute information of the input image information in units of the same line direction, The attribute information is packed and stored for each block, the packed data is decoded and rotated by 90 °, the rotated block data is converted into raster data, and the raster data is processed and output. Image processing method.   Receive and store the input image information, block the input image information in units of multiple pixels in the line direction and compress the fixed length, block the attribute information of the input image information in units of the same line direction, Attribute information is packed and saved for each block, the packed data is rotated 90 degrees and stored, the packed data is decoded and converted to raster data, and the raster data is processed and output. An image processing method characterized by the above.