Patent ID: 7889250
Filing Date: 2011-02-15
Classification: G06T,H04N

Abstract:
1. An image-acquisition apparatus for performing grayscale conversion processing on an image signal from an image-acquisition device, in each of regions in an image represented by the image signal, comprising: an image processing part for performing image processing on the image signal from the image-acquisition device; a reduced-image generating part for reducing the image signal, after being subjected to the image processing, with a prescribed reduction ratio to generate a reduced-image signal; a correction-coefficient-group calculating part for creating a first correction-coefficient group formed of a plurality of correction coefficients corresponding to a plurality of pixels in the image signal after being subjected to the image processing, in each of the regions, using the reduced-image signal; a correction-coefficient-group adjusting part for creating a second correction-coefficient group by adjusting the first correction-coefficient group by using the image signal from the image-acquisition device or a feature of the image signal after being subjected to the image processing; and a grayscale converting part for performing the grayscale conversion processing in each of the regions by using the second correction-coefficient group.