2014/10/15 下午 10:13:29

iphone Programming Glossary: rgbimage

http://stackoverflow.com/questions/1298867/convert-image-to-grayscale

i int kRed 1 int kGreen 2 int kBlue 4 int colors kGreen int m_width i.size.width int m_height i.size.height uint32_t rgbImage uint32_t malloc m_width m_height sizeof uint32_t CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef context.. sizeof uint32_t CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate rgbImage m_width m_height 8 m_width 4 colorSpace kCGBitmapByteOrder32Little kCGImageAlphaNoneSkipLast CGContextSetInterpolationQuality.. m_imageData uint8_t malloc m_width m_height for int y 0 y m_height y for int x 0 x m_width x uint32_t rgbPixel rgbImage y m_width x uint32_t sum 0 count 0 if colors kRed sum rgbPixel 24 255 count if colors kGreen sum rgbPixel 16 255 count..

How to crop the image in iPhone

http://stackoverflow.com/questions/7950719/how-to-crop-the-image-in-iphone

UIImageOrientationDown imageRect CGRectMake 0 0 m_wint m_hint else imageRect CGRectMake 0 0 m_hint m_wint uint32_t rgbImage uint32_t malloc m_wint m_hint sizeof uint32_t CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef context.. sizeof uint32_t CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate rgbImage m_wint m_hint 8 m_wint sizeof uint32_t colorSpace kCGBitmapByteOrder32Little kCGImageAlphaNoneSkipLast CGContextSetInterpolationQuality.. m_wint here float fx x double xx m_width asin m_width 2 R asin m_width 2 fx R 2 asin m_width 2 R uint32_t rgbPixel rgbImage int yy m_wint int xx int intRedSource rgbPixel 24 255 int intGreenSource rgbPixel 16 255 int intBlueSource rgbPixel 8 255..