Patent ID: 6873437
Filing Date: 2005-03-29
Classification: H04N

Abstract:
1. A method for multi-valuation processing of image data wherein an original image is quantized into n-levels and outputted, said method comprising the steps of: ranking the respective pixels in an area according to the value of the image data of said pixels, said area being a scanning window in an original image data containing an object pixel, pixels around said object pixel and an input pixel and said ranking effected in said scanning window, level division to extract the pixels belonging to the same division levels, the pixels being obtained when the image data of the respective re-allocated pixels and said input pixel are divided in (n−1) levels in said scanning window, calculating, by levels, an allocation number or quotient and residual by working out the sum of re-allocation values or the sum of image data of said respective level divided pixels, said quotient and residual obtained when said re-allocation value sum is divided by the specific value, re-allocating, by levels, said specific value and said residuals in said allocation number according to said rank order, and multi-leveling and outputting the sum of re-allocation values at the position of said object pixel.