Image data processing apparatus, image data processing method, and computer readable medium

An image data processing method comprising:

• performing lossless compression for each line of image data;
• performing control so that a first configuration and a second configuration are selectively set in a reconfigurable circuit, the first configuration including a first line memory set for retaining therein compressed image data obtained by performing lossless compression and a decompression circuit set for decompressing the compressed image data, the second configuration including a second line memory set for retaining therein the image data in the form of non-compressed image data, a capacity of the first line memory set being determined so that a circuit scale of the first configuration is equal to or smaller than a circuit scale of the second configuration;
• when compressing each of the lines of a unit of processing of the image data, determining a maximum size among data sizes of the lines of the compressed image data;
• and
• performing control so that, when the determined maximum size is equal to or smaller than a predetermined threshold which corresponds to the capacity of the first line memory set, the first configuration is set in the reconfigurable circuit and the obtained compressed image data is output to an image processing circuit via the first line memory set, and so that, when the determined maximum size is greater than the predetermined threshold, the second configuration is set in the reconfigurable circuit and the non-compressed image data is output to the image processing circuit via the second line memory set.

A non-transitory computer readable medium storing a program causing a computer to execute a process, the process comprising:

• performing lossless compression for each line of image data;
• performing control so that a first configuration and a second configuration are selectively set in a reconfigurable circuit, the first configuration including a first line memory set for retaining therein compressed image data obtained by performing lossless compression and a decompression circuit set for decompressing the compressed image data, the second configuration including a second line memory set for retaining therein the image data in the form of non-compressed image data, a capacity of the first line memory set being determined so that a circuit scale of the first configuration is equal to or smaller than a circuit scale of the second configuration;
• when compressing each of the lines of a unit of processing of the image data, determining a maximum size among data sizes of the lines of the compressed image data;
• and
• performing control so that, when the determined maximum size is equal to or smaller than a predetermined threshold which corresponds to the capacity of the first line memory set, the first configuration is set in the reconfigurable circuit and the obtained compressed image data is output to an image processing circuit via the first line memory set, and so that, when the determined maximum size is greater than the predetermined threshold, the second configuration is set in the reconfigurable circuit and the non-compressed image data is output to the image processing circuit via the second line memory set.