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; 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.