Doc:Glossary/Alpha Channel
< Doc:Glossary
2011年10月15日 (土) 18:54時点におけるwiki>Mindronesによる版 (moved Doc:Reference/Glossary/Alpha Channel to Doc:Glossary/Alpha Channel)
Alpha Channel
Additional channel in 2D image for transparency. In a image element which stores a color for each pixel, an additional value is stored in the alpha channel containing a value between 0 and 1. A value of 0 means that the pixel does not have any coverage information; i.e. there was no color contribution from any geometry because the geometry did not overlap this pixel. A value of 1 means that the pixel is fully opaque because the geometry completely overlapped the pixel.