2014/10/15 下午 10:09:56

iphone Programming Glossary: greyscale

http://stackoverflow.com/questions/1021801/cgpathref-intersection

RGBA context. This solution is superior to the old one because it is simpler uses a quarter of the memory as an 8bit greyscale context suffices obviates the need for hairy difficult to debug transparency code Who could ask for more I guess you could..

Convert image to grayscale

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

function returning an invalid image or is the display not showing it correctly This is the method I use to convert to greyscale. UIImage convertToGreyscale UIImage i int kRed 1 int kGreen 2 int kBlue 4 int colors kGreen int m_width i.size.width int..

How to tint a transparent PNG image in iPhone?

http://stackoverflow.com/questions/3514066/how-to-tint-a-transparent-png-image-in-iphone

to figure out what suits you best. iphone ios image uiimage tint share improve this question If you have a greyscale image and want white become the tinting color kCGBlendModeMultiply is the way to go. With this method you cannot have highlights.. With this method you cannot have highlights lighter than your tinting color. On the contrary if you have either a non greyscale image OR you have highlights and shadows that should be preserved the blend mode kCGBlendModeColor is the way to go. White..

How do I convert the live video feed from the iPhone camera to grayscale?

http://stackoverflow.com/questions/4381513/how-do-i-convert-the-live-video-feed-from-the-iphone-camera-to-grayscale

For OpenGL ES 1.1 devices I'd look at using Apple's GLImageProcessing sample application as a base it has an OpenGL greyscale filter within it and running your live video frames through that. For OpenGL ES 2.0 you might want to use a programmable..

How to implement alpha gradient on a image?

http://stackoverflow.com/questions/5908731/how-to-implement-alpha-gradient-on-a-image

to apply a masking image to it. You could generate an appropriate mask simply enough by drawing to a greyscale or alpha only CGBitmapContext with CGContextDrawLinearGradient . If it's being displayed as the content of a CALayer you..

GLImageProcessing Multiple Filters?

http://stackoverflow.com/questions/6425861/glimageprocessing-multiple-filters

V2fT2f float typedef struct procfunc func procfunc degen Filter const Filter filter brightness contrast extrapolate greyscale hue extrapolate blur The blur could be exaggerated by downsampling to half size #define NUM_FILTERS sizeof filter sizeof..

Create image from RGB data?

http://stackoverflow.com/questions/7235991/create-image-from-rgb-data

but just don't get it. Tried looking at the class reference and am feeling quite stuck. All I want is a 10x10 greyscale image generated from some calculations and if there is an easy way to create a png or something that would be great. iphone..