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2014/10/15 ¤U¤È 10:05:04
iphone Programming Glossary: cgimagegetcolorspacehttp://stackoverflow.com/questions/12214273/opencv-install-in-xcode UIImageCVMatConverter UIImage UIImageFromCVMat cv Mat cvMat withUIImage UIImage image CGColorSpaceRef colorSpace CGImageGetColorSpace image.CGImage CGFloat cols image.size.width CGFloat rows image.size.height CGFloat widthStep image.size.width CGContextRef.. CGColorSpaceRelease colorSpace return finalImage cv Mat cvMatFromUIImage UIImage image CGColorSpaceRef colorSpace CGImageGetColorSpace image.CGImage CGFloat cols image.size.width CGFloat rows image.size.height cv Mat cvMat rows cols CV_8UC4 CGContextRef contextRef..
Resizing UIimages pulled from the Camera also ROTATES the UIimage? http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage CGContextRef bitmap CGBitmapContextCreate NULL width height CGImageGetBitsPerComponent imageRef 4 width CGImageGetColorSpace imageRef alphaInfo CGContextDrawImage bitmap CGRectMake 0 0 width height imageRef CGImageRef ref CGBitmapContextCreateImage.. imageRef sourceImage CGImage CGBitmapInfo bitmapInfo CGImageGetBitmapInfo imageRef CGColorSpaceRef colorSpaceInfo CGImageGetColorSpace imageRef if bitmapInfo kCGImageAlphaNone bitmapInfo kCGImageAlphaNoneSkipLast CGContextRef bitmap if sourceImage.imageOrientation..
How to Rotate a UIImage 90 degrees? http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees imageRef sourceImage CGImage CGBitmapInfo bitmapInfo CGImageGetBitmapInfo imageRef CGColorSpaceRef colorSpaceInfo CGImageGetColorSpace imageRef if bitmapInfo kCGImageAlphaNone bitmapInfo kCGImageAlphaNoneSkipLast CGContextRef bitmap if sourceImage.imageOrientation..
How do I create/render a UIImage from a 3D transformed UIImageView? http://stackoverflow.com/questions/1949003/how-do-i-create-render-a-uiimage-from-a-3d-transformed-uiimageview CGBitmapContextCreate outputData CGImageGetWidth imageRef CGImageGetHeight imageRef 8 CGImageGetBytesPerRow imageRef CGImageGetColorSpace imageRef kCGImageAlphaPremultipliedLast imageRef CGBitmapContextCreateImage ctx UIImage rawImage UIImage imageWithCGImage..
http://stackoverflow.com/questions/2635371/how-to-crop-the-uiimage CGContextRef context CGBitmapContextCreate void pixels image.size.width image.size.height 8 image.size.width 4 CGImageGetColorSpace image.CGImage kCGImageAlphaPremultipliedLast if context NULL Draw the image in the bitmap CGContextDrawImage context CGRectMake..
iPhone SDK: accessing indexed color PNG images http://stackoverflow.com/questions/3251595/iphone-sdk-accessing-indexed-color-png-images reference.html which lists CGColorSpaceCreateIndexed CGColorSpaceGetColorTable and more. Use CGColorSpaceGetModel CGImageGetColorSpace img to see if the color space you end up with is an indexed one then use CGImageGetDataProvider to get a CGDataProviderRef.. NO kCGRenderingIntentDefault if img printf image failed n printf Color space model d indexed d n CGColorSpaceGetModel CGImageGetColorSpace img kCGColorSpaceModelIndexed output path Users .... 638...8C12 test.app test.png Color space model 5 indexed 5 qed ps...
How to display an image on a MKOverlayView? http://stackoverflow.com/questions/3891850/how-to-display-an-image-on-a-mkoverlayview imageReference self.scaleFactor Calculate colorspace for the specified image CGColorSpaceRef imageColorSpace CGImageGetColorSpace imageReference Allocate and clear memory for the data of the image unsigned char imageData unsigned char malloc height width..
CoreGraphics for retina display http://stackoverflow.com/questions/4707465/coregraphics-for-retina-display section.size.width int h originalHeight section.size.height CGContextRef ctx CGBitmapContextCreate nil w h 8 w 8 CGImageGetColorSpace image CGImage kCGImageAlphaPremultipliedLast CGContextClearRect ctx CGRectMake 0 0 originalWidth section.size.width originalHeight..
iOS UIImagePickerController result image orientation after upload http://stackoverflow.com/questions/5427656/ios-uiimagepickercontroller-result-image-orientation-after-upload ctx CGBitmapContextCreate NULL self.size.width self.size.height CGImageGetBitsPerComponent self.CGImage 0 CGImageGetColorSpace self.CGImage CGImageGetBitmapInfo self.CGImage CGContextConcatCTM ctx transform switch self.imageOrientation case UIImageOrientationLeft..
iPhone CGContextRef CGBitmapContextCreate unsupported parameter combination http://stackoverflow.com/questions/5545600/iphone-cgcontextref-cgbitmapcontextcreate-unsupported-parameter-combination CGBitmapContextCreate NULL newRect.size.width newRect.size.height CGImageGetBitsPerComponent imageRef 0 CGImageGetColorSpace imageRef CGImageGetBitmapInfo imageRef if bitmap nil return nil CGContextConcatCTM bitmap transform CGContextSetInterpolationQuality.. cgbitmapcontextcreate share improve this question I figured out it's a problem with the color space. Just replace CGImageGetColorSpace imageRef with CGColorSpaceCreateDeviceRGB . This works for me when trying to save image I got from AVCaptureSession. And.. NULL newRect.size.width newRect.size.height CGImageGetBitsPerComponent imageRef 0 rgbColorSpace CGImageGetColorSpace imageRef sometimes contains unsupported colorspace bitmapInfo CGColorSpaceRelease rgbColorSpace share improve this answer..
Getting RGB pixel data from CGImage http://stackoverflow.com/questions/6073259/getting-rgb-pixel-data-from-cgimage bpp bpc CGBitmapInfo info CGImageGetBitmapInfo cgimage NSLog @ n @ n CGImageGetHeight d n CGImageGetWidth d n CGImageGetColorSpace @ n CGImageGetBitsPerPixel d n CGImageGetBitsPerComponent d n CGImageGetBytesPerRow d n CGImageGetBitmapInfo 0x .8X n kCGBitmapAlphaInfoMask.. s n kCGBitmapByteOrder32Little s n kCGBitmapByteOrder16Big s n kCGBitmapByteOrder32Big s n file int width int height CGImageGetColorSpace cgimage int bpp int bpc int bpr unsigned info info kCGBitmapAlphaInfoMask YES NO info kCGBitmapFloatComponents YES NO info.. 5x3 rgb. The a.png image has an alpha channel while the b.rgb does not. a.png CGImageGetHeight 5 CGImageGetWidth 3 CGImageGetColorSpace CGColorSpace 0x4d08ff0 kCGColorSpaceDeviceRGB CGImageGetBitsPerPixel 32 CGImageGetBitsPerComponent 8 CGImageGetBytesPerRow..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud CGImageGetBitsPerComponent originalImage CGImageGetBitsPerPixel originalImage CGImageGetBytesPerRow originalImage CGImageGetColorSpace originalImage CGImageGetBitmapInfo originalImage imageDataProvider CGImageGetDecode originalImage CGImageGetShouldInterpolate..
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