Patent ID: 7221476
Filing Date: 2007-05-22
Classification: G06K,G06T,H04N

Abstract:
1. A picture image processing apparatus, comprising: an image storage portion which stores RGB data pixel by pixel which data is obtained from a photographed film image while being separated into color components of R, G, B; a hue calculator which calculates a hue pixel by pixel based on the RGB data; a first sampling device which samples pixels having a hue corresponding to a skin color from the RGB data stored on the image storage portion; a first characteristic quantity calculator which calculates a first characteristic quantity representing a characteristic of the RGB data of the pixels sampled by the first sampling device; a second sampling device which samples the pixels located in a central part of an image area; a second characteristic quantity calculator which calculates a second characteristic quantity representing a characteristic of the RGB data of the pixels sampled by the second sampling device; a correction amount calculator which calculates a density correction amount using the first and second characteristic quantities; and a density corrector which applies a density correction to the RGB data using the density correction amount; wherein the correction amount calculator normalizes a group of the first characteristic quantities and a group of the second characteristic quantities of the RGB data of a plurality of standard photographed images, applies Schmidt orthogonalization to the normalized two groups, and calculates a density correction amount by an equation defined by a factor obtained by normalizing the orthogonalized two groups again and variables including the first and second characteristic quantities.