Pixel input-output method, image compressing method, pixel input-output apparatus, image compressing apparatus, image processing apparatus, image forming apparatus, computer program and recording medium

An image processing apparatus, comprising:

• an accepting unit that accepts an image;
• a packing unit that packs, at an input interval, pixels of the image accepted by the accepting unit, wherein one data package consists of α pixels, the α being a positive integer greater than 1;
• a memory that has a first memory region and a second memory region, and stores the data package generated by the packing unit;
• and
• a control unit that controls the data package in the memory,
• wherein
• the control unit stores, in the first memory region, one data package generated by the packing unit, at a store interval that is α times longer than the input interval;
• the control unit reads out the “one data package” stored in the first memory region at a read interval that is the same as the input interval;
• during reading out the “one data package” stored in the first memory region, the control unit stores, in the second memory region at the store interval, another data package generated by the packing unit;
• the control unit reads out the “another data package” stored in the second memory region at the read interval;
• and
• during reading out the “another data package” stored in the second memory region, the control unit stores, in the first memory region at the store interval, other data package generated by the packing unit.

A recording medium having stored thereon computer executable program for processing data, the computer program when executed causes a computer system to execute steps of:

• generating a data package by packing, at an input interval, pixels of an accepted image, wherein one data package consists of α pixels, the α being a positive integer greater than 1;
• storing the generated data package in a memory;
• and
• reading out the data package stored in the memory,
• wherein
• one data package generated by packing is stored in a first memory region of the memory, at a store interval that is α times longer than the input interval;
• the “one data package” stored in the first memory region is read out at a read interval that is the same as the input interval;
• during reading out the “one data package” stored in the first memory region, another data package generated by packing is stored in a second memory region of the memory at the store interval;
• the “another data package” stored in the second memory region is read out at the read interval;
• and
• during reading out the “another data package” stored in the second memory region, other data package generated by packing is stored in the first memory region at the store interval.