Patent ID: 6115150
Filing Date: 2000-09-05
Classification: H04N

Abstract:
An image data processing apparatus that is adapted to process received image data in accordance with a selected one of a plurality of image modes and provide the processed data as an output, the image data processing apparatus comprising:selective input means for selecting any one of the plurality of image modes;output gradation reference curve storage means storing therein an output gradation reference curve;computation data storage means storing therein computation data that is to be used for computing values to be plotted on an output gradation curve suitable for each of the image modes on the basis of the output gradation reference curve; anddata processing means for processing received data in accordance with the image mode selected by the selective input means on the basis of the output gradation reference curve stored in the output gradation reference curve storage means and the computation data stored in the computation data storage means;wherein the computation data storage means is adapted to be addressed on the basis of the received data, and stores therein the computation data in the form of a plurality of computation tables from which addressed data is generated;wherein the output gradation reference curve storage means is adapted to be addressed on the basis of data generated by any of the computation tables, and stores therein the output gradation reference curve in the form of a table from which addressed data is generated; andwherein the data processing means selects one of the computation tables which corresponds to the image mode selected by the selective input means, and applies the received image data as an address to the selected computation table.