Image capturing apparatus for adjusting an exposure value that is set lower than the correct exposure value
In an image capturing apparatus, a hue shift is prevented. A digital camera has a gray level correction function. Image data obtained with a CCD 10 is divided into a plurality of blocks and further has brightness data and color difference data converted in a brightness/color difference conversion section 20 . When it is determined, based on the color difference data, that image data includes blue sky image or that chroma of the image data is high, an image processing exposure compensation adjustment/exposure correction amount calculation section 30 sets an underexposure value, which is employed when capturing images with an exposure value being lower than a correct exposure value, to be smaller than a default value to prevent a hue shift caused by gray level correction performed by a gray level correction section 32.
1. An image capturing apparatus for capturing an image of a subject, comprising:
exposure control means which calculates a correct exposure value;
image correction means which applies gray level correction to image data of an image captured with an exposure value being set lower than the correct exposure value; and
adjustment means which adjusts an exposure value which is to be set lower than the correct exposure value by determining whether or not color data of the image data prior to the gray level correction performed by the image correction means satisfies a particular condition;
wherein the adjustment means provides data concerning an amount of adjustment to the image correction means, and the image correction means uses the data concerning an amount of adjustment to adjust a correction amount; and
wherein blue sky image data in the image data causes the adjustment means to set the exposure value which is to be set lower than the correct exposure value to a value whose amount of the exposure compensation is smaller than a default value.
2. An image capturing apparatus for capturing an image of a subject, comprising:
exposure control means which calculates a correct exposure value;
image correction means which applies gray level correction to image data of an image captured with an exposure value being set lower than the correct exposure value; and
adjustment means which adjusts an exposure value which is to be set lower than the correct exposure value by determining whether or not color data of the image data prior to the gray level correction performed by the image correction means satisfies a particular condition;
wherein the adjustment means provides data concerning an amount of adjustment to the image correction means, and the image correction means uses the data concerning an amount of adjustment to adjust a correction amount; and
wherein saturated color data of the image data causes the adjustment means to set the exposure value which is to be set lower than the correct exposure value to a value whose amount of the exposure compensation is smaller than a default value.