| 摘要 |
PURPOSE:To perform a correct picture processing at high speed and to require no troublesome correction processing afterward by selectively counting the density in image data applied to a window area during the formation of a histogram. CONSTITUTION:The image data IMD read from a picture memory 20 is outputted to a look up table (LUT)32 and window data WDD applied to a corresponding picture element read from a window memory 22 is inputted to a microprogram sequencer 28. When it is indicated that the window data WDD is within the window area WDA (WDD='1'), a density counting processing command is applied to a histogram processor 24 to count the image data IMD' outputted from the LUT32 for the density, on the other hand, when it is indicated that the window data WDD is not within the window area WDA (WDD = 'o'), the density counting processing command is not applied to the histogram processor 24 but the processing is shifted to the next picture element, thereby, the historgram is formed only for the data within the window area. |
