Abstract: An image processing apparatus includes an image partitions manipulating unit that manipulates image partitions of encoded image information, each image partition containing plural values of pixels; a decoding unit that decodes the image information manipulated by the image partitions manipulating unit; and a pixels manipulating unit that manipulates pixels of the image information decoded by the decoding unit, partitioning an image into partitions which are manipulated by the image partitions manipulating unit being changed according to what manipulation is to be performed by the pixels manipulating unit.

Abstract: A coding apparatus includes a predicting unit, an intermediate-code generating unit, a first coding unit and a second coding unit. The predicting unit generates a piece of prediction data based on each piece of pixel data constituting a color image. The intermediate-code generating unit compares each piece of prediction data with the corresponding piece of pixel data, to generate an intermediate code in accordance with whether or not a difference between each piece of prediction data and the corresponding piece of pixel data is in a predetermined range. The first coding unit performs entropy coding on the generated intermediate code. The second coding unit performs entropy coding on the generated intermediate code. The intermediate-code generating unit assigns each generated intermediate code to either of the first and second coding units according to whether or not the difference is in the predetermined range.

Abstract: This invention provides an encoding apparatus including a group generating unit that puts plural information values to be compressed together and generates a group of information values to be compressed; a code assignment unit that assigns a code to each group generated by the group generating unit; and an information encoding unit that encodes the information values to be compressed belonging to each group, using the code assigned to each group.

Abstract: An encoding apparatus includes a block dividing unit that divides an inputted data file into blocks each including plural data elements arranged in the order of encoding, a predicted data creating unit that creates predicted data for each of the blocks resulting from the division by the block dividing unit on the basis of data elements contained in other blocks, a comparing unit that compares the predicted data created by the predicted data creating unit with data elements contained in the blocks, and a code creating unit that creates codes for the inputted data file on the basis of results of the comparison by the comparing unit.

Abstract: A coding apparatus includes a predicting unit, an intermediate-code generating unit, a first coding unit and a second coding unit. The predicting unit generates a piece of prediction data based on each piece of pixel data constituting a color image. The intermediate-code generating unit compares each piece of prediction data with the corresponding piece of pixel data, to generate an intermediate code in accordance with whether or not a difference between each piece of prediction data and the corresponding piece of pixel data is in a predetermined range. The first coding unit performs entropy coding on the generated intermediate code. The second coding unit performs entropy coding on the generated intermediate code. The intermediate-code generating unit assigns each generated intermediate code to either of the first and second coding units according to whether or not the difference is in the predetermined range.

Abstract: An encoder includes a prediction unit and a code generation unit. The prediction unit predicts target data and judges whether prediction is right or wrong. When the prediction unit judges that consecutive predictions for respective target data are wrong, the code generation unit generates coded data including symbols corresponding to the respective target data for which the consecutive wrong predictions are made, using a code representing number of the consecutive predictions judged as wrong.

Abstract: A coding device includes a first coding unit that uses a Markov model coding system to code noticed data as a coding object, a second coding unit that uses a coding system different from the Markov model coding system to code the noticed data, and a selection unit that selects, as a coding unit to be applied, one of the first coding unit and the second coding unit based on the noticed data.