Color image processing method, color image processing device, and color image processing program

摘要

An object area detection means detects an object area which is an area to be subjected to image processing from an input image. A reflection component reconstruction means calculates color information of the object area and a perfect diffusion component, which is a low-frequency component of the object area, and reconstructs a surface reflection component based on the color information and the low-frequency component. An albedo calculation means calculates an albedo, which is color information obtained by removing shading information, which is information that represents luminance of the perfect diffusion component, from the perfect diffusion component. An albedo correction processing means reconstructs a surface reflectance of the object area based on the albedo and the color information in the object area, and then calculates the corrected albedo, which is color information obtained by correcting the albedo based on the surface reflectance.

主权项

1. A color image processing method comprising:
detecting an object area which is an area to be subjected to image processing from an input image; calculating color information of the object area and a perfect diffusion component which is a low-frequency component of the object area; reconstructing a surface reflection component based on the color information and the low-frequency component; calculating an albedo, which is color information obtained by removing shading information which is information that represents luminance of the perfect diffusion component, from the perfect diffusion component; reconstructing a surface reflectance of the object area based on the color information and the albedo of the object area; calculating a corrected albedo which is color information obtained by correcting the albedo based on the surface reflectance; calculating a reproduced color which is color information obtained by adding the shading information and the surface reflection component to the corrected albedo; and generating an output image based on the reproduced color.