A method for generating bitmap image data of a page includes acquiring print data of a page including compressed images, and performing rendering of bands included in the page based on the print data to generate the bitmap image data. The performing of the rendering performs rendering at least two of the bands concurrently. The performing of the rendering includes decompressing the compressed images, and using the decompressed images for corresponding bands of the bands to generate the bitmap image data. The decompressing decompresses, into a same memory area in a decompression buffer, at least two compressed images used for different bands, so that one of the two compressed images is decompressed into the same memory area and another of the two compressed images is decompressed, after rendering of a last band for which the one of the two compressed images is lastly used is finished, into the same memory area.

A data processing method processes data using a processor including N (N is an integer equal to or more than 2) cores and a memory. The data processing method includes: searching a new character as a character whose raster data is not stored in the memory among a plurality of characters specified by character data included in print data to count a count of the searched new characters; generating M (M is an integer equal to or less than the N) threads, wherein the M is a count determined based on the count of the counted new characters among the N; dividing and allocating the plurality of characters to the M threads to generate raster data for the new characters using any one of the N cores for each of the M threads; and rendering the plurality of characters using raster data corresponding to the character data.

A Raster Image Processing (RIP) module includes an object detection module configured to receive at least one input file, detect objects in the at least one input file and create at least one image comprising a predefined number of stripes along the edges of the detected objects, an edge processing module configured to receive the at least one image and process the at least one image by changing the gray level of each one of the objects' stripes according to an edge processing table; and a dithering module configured to receive the at least one processed image, dither the at least one processed image according to the at least one image's gray levels and output a printing ready file.

A data processing method processes data using a processor including N (N is an integer equal to or more than 2) cores and a memory. The data processing method includes: searching a new character as a character whose raster data is not stored in the memory among a plurality of characters specified by character data included in print data to count a count of the searched new characters; generating M (M is an integer equal to or less than the N) threads, wherein the M is a count determined based on the count of the counted new characters among the N; dividing and allocating the plurality of characters to the M threads to generate raster data for the new characters using any one of the N cores for each of the M threads; and rendering the plurality of characters using raster data corresponding to the character data.

A Raster Image Processing (RIP) module includes an object detection module configured to receive at least one input file, detect objects in the at least one input file and create at least one image comprising a predefined number of stripes along the edges of the detected objects, an edge processing module configured to receive the at least one image and process the at least one image by changing the gray level of each one of the objects' stripes according to an edge processing table; and a dithering module configured to receive the at least one processed image, dither the at least one processed image according to the at least one image's gray levels and output a printing ready file.

A method for generating bitmap image data of a page includes acquiring print data of a page including compressed images, and performing rendering of bands included in the page based on the print data to generate the bitmap image data. The performing of the rendering performs rendering at least two of the bands concurrently. The performing of the rendering includes decompressing the compressed images, and using the decompressed images for corresponding bands of the bands to generate the bitmap image data. The decompressing decompresses, into a same memory area in a decompression buffer, at least two compressed images used for different bands, so that one of the two compressed images is decompressed into the same memory area and another of the two compressed images is decompressed, after rendering of a last band for which the one of the two compressed images is lastly used is finished, into the same memory area.