Image forming apparatus, image forming method, and storage medium storing program
AssigneeCanon Kabushiki Kaisha
InventorKenji Kasuya
Life of this patent
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Abstract
Image data stored in a spool memory and respectively corresponding to a plurality of colors is read and sequentially decompressed, and image forming processing is performed based on the decompressed image data. In the decompression, the image data respectively corresponding to the plurality of colors is sequentially decompressed, switching between decompression target data in units of bands.
Claims13
An image forming apparatus, comprising:
- a spool memory configured to store compressed image data corresponding to each of a plurality of printing material colors used in image forming processing;
- a first decompression unit configured to read and sequentially decompress image data stored in the spool memory and respectively corresponding to the plurality of colors;
- and
- an image forming unit configured to perform the image forming processing based on the image data decompressed by the first decompression unit,
- wherein the first decompression unit sequentially decompresses the image data respectively corresponding to the plurality of colors, switching between decompression target data in units of bands.
An image forming method that is executed in an image forming apparatus equipped with a spool memory for storing compressed image data corresponding to each of a plurality of printing material colors used in image forming processing, the method comprising:
- reading and sequentially decompressing the respective image data stored in the spool memory and corresponding to the plurality of colors;
- performing the image forming processing based on the decompressed image data;
- and
- in performing the decompression, sequentially decompressing the image data respectively corresponding to the plurality of colors, switching between decompression target data in units of bands.
A non-transitory computer-readable storage medium storing a program for causing a computer to function to read and sequentially decompress image data stored in a spool memory, which is for storing compressed image data corresponding to each of a plurality of printing material colors used in image forming processing, and respectively corresponding to the plurality of colors;
- perform the image forming processing based on the decompressed image data;
- and
- in performing the decompression, sequentially decompress the image data respectively corresponding to the plurality of colors, switching between decompression target data in units of bands.
An image forming apparatus, comprising:
- a compression unit configured to compress, in units of bands, image data corresponding to each of a plurality of printing material colors used in image forming processing;
- a storage unit configured to store the image data corresponding to each color and compressed by the compression unit;
- a decompression unit configured to read and decompress, in units of bands, the compressed image data stored in the storage unit and corresponding to each color;
- a processing unit configured to sequentially input the image data decompressed in units of bands by the decompression unit, and perform analysis processing in the order in which the bands are inputted;
- and
- an image forming unit configured to perform image forming processing of the decompressed image data based on a result of the analysis by the processing unit, wherein
- the decompression unit, in a single band to be processed, a first decompression unit, after performing decompression of the stored compressed data of a first color, performs decompression of the stored compressed data of a second color, and
- in parallel to the decompression processing by the first decompression unit in the single band, a second decompression unit, in the single band, after performing decompression of the stored compressed data of a third color, performs decompression of the stored compressed data of a fourth color.
An image forming method, comprising:
- compressing, in units of bands, image data corresponding to each of a plurality of printing material colors used in image forming processing;
- storing the compressed image data corresponding to each of the colors in a storage unit;
- reading and decompressing, in units of bands, the compressed image data stored in the storage unit and corresponding to each color;
- sequentially inputting the image data decompressed in units of bands, and performing analysis processing in the order in which the bands are inputted;
- performing image forming processing of the decompressed image data based on a result of the analysis by the analysis processing;
- when performing the decompression, in a single band to be processed, a first decompression unit, after performing decompression of the stored compressed data of a first color, performs decompression of the stored compressed data of a second color;
- and
- in parallel to the decompression processing by the first decompression unit in the single band, a second decompression unit, in the single band, after performing decompression of the stored compressed data of a third color, performs decompression of the stored compressed data of a fourth color.
Dependencies are inferred from the claim text.