JP2006024132A5

JP2006024132A5 -

Info

Publication number: JP2006024132A5
Application number: JP2004203702A
Authority: JP
Filing date: 2004-07-09
Publication date: 2007-08-23
Anticipated expiration: 2024-07-09

Claims

An acquisition step of acquiring an image captured by the imaging device;
An extraction step of extracting the skin area of the subject from the image;
An analysis step of analyzing the image data of the skin region;
And a determination step of determining whether or not the subject has been photographed in an oblique state based on the analysis result of the image data.

The analysis step calculates a region where the difference between the luminance value of each skin region of the subject and the luminance average value of the skin region is a predetermined value or more, and calculates the area ratio of the region in the skin region;
The image processing method according to claim 1, wherein the determination step determines a degree of an oblique light state when the image is captured according to the area ratio.

A changing step of changing a correction target value when correcting the image based on the degree of the oblique state of the image determined by the determining step;
The image processing method according to claim 2, further comprising: a correction step of correcting the image in accordance with the correction target value changed by the changing step.

The image processing method according to claim 1, wherein the extracting step extracts a human face area from the image as a skin area of the subject.

The changing step changes an exposure correction target value when correcting the exposure of the image,
The image processing method according to claim 3, wherein the correction step corrects the exposure of the image in accordance with the exposure correction target value changed by the changing step.

Acquisition means for acquiring an image captured by the imaging device;
Extracting means for extracting a skin area of the subject from the image;
Analyzing means for analyzing the image data of the skin region;
An image processing apparatus comprising: determination means for determining whether or not the subject has been photographed in an oblique light state based on the analysis result of the image data.

The analysis means calculates a region where the difference between each luminance value of the skin region of the subject and the average luminance value of the skin region is a predetermined value or more, and calculates the area ratio of the region in the skin region;
The image processing apparatus according to claim 6, wherein the determination unit determines a degree of an oblique light state when the image is captured according to the area ratio.

Changing means for changing a correction target value when correcting the image based on the degree of the oblique light state of the image determined by the determining means;
The image processing apparatus according to claim 7, further comprising: a correcting unit that corrects the image according to the correction target value changed by the changing unit.

The image processing apparatus according to claim 6, wherein the extraction unit extracts a human face area from the image as the skin area of the subject.

The changing means changes an exposure correction target value when correcting the exposure of the image,
The image processing apparatus according to claim 8, wherein the correction unit corrects the exposure of the image according to the exposure correction target value changed by the changing unit.

On the computer,
An acquisition procedure for acquiring an image captured by the imaging device;
An extraction procedure for extracting the skin area of the subject from the image;
An analysis procedure for analyzing the image data of the skin region;
A determination procedure for determining whether or not the subject has been photographed in a slanted state based on the analysis result of the image data.

A computer-readable recording medium storing the program according to claim 11.