2014/10/15 下午 10:12:56
iphone Programming Glossary: processimagehttp://stackoverflow.com/questions/1298867/convert-image-to-grayscale CGContextDrawImage context CGRectMake 0 0 width height image CGContextRelease context return rawData UIImage processImage UIImage pImage DebugLog @ processing image unsigned char rawData self getBytesForImage pImage NSUInteger width pImage.size.width.. newPixelData free rawData DebugLog @ image processed return newImage So when I want to convert an image I just call processImage imageToDisplay.image self processImage image But imageToDisplay doesn't display. What may be the problem Thanks. iphone.. image processed return newImage So when I want to convert an image I just call processImage imageToDisplay.image self processImage image But imageToDisplay doesn't display. What may be the problem Thanks. iphone cocoa touch cgimage share improve this..
http://stackoverflow.com/questions/1317978/iphone-get-camera-preview viewImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext imageToDisplay.image PixelProcessing processImage viewImage In this case the image is black imageToDisplay.image viewImage In this case the image is black too imageToDisplay.image..
How i count red color pixel from the UIImage using objective-C in iphone? http://stackoverflow.com/questions/2342327/how-i-count-red-color-pixel-from-the-uiimage-using-objective-c-in-iphone format struct pixel unsigned char r g b a Process the image and return the number of pure red pixels in it. NSUInteger processImage UIImage image NSUInteger numberOfRedPixels 0 Allocate a buffer big enough to hold all the pixels struct pixel pixels struct.. CGContextRelease context free pixels return numberOfRedPixels A simple example on how to call this IBAction processImage NSUInteger numberOfRedPixels self processImage UIImage imageNamed @ DutchFlag.png label_.text NSString stringWithFormat.. return numberOfRedPixels A simple example on how to call this IBAction processImage NSUInteger numberOfRedPixels self processImage UIImage imageNamed @ DutchFlag.png label_.text NSString stringWithFormat @ There are d red pixels in the image numberOfRedPixels..
iPhone AVFoundation camera orientation http://stackoverflow.com/questions/3662930/iphone-avfoundation-camera-orientation jpegStillImageNSDataRepresentation imageDataSampleBuffer UIImage image UIImage alloc initWithData imageData self processImage image processImage uses the same writeImage... method as the WWDC code and the code from the WWDC app is... AVCaptureConnection.. imageDataSampleBuffer UIImage image UIImage alloc initWithData imageData self processImage image processImage uses the same writeImage... method as the WWDC code and the code from the WWDC app is... AVCaptureConnection videoConnection..
Converting a UIImage black'n white and not grayscale for using tesseract http://stackoverflow.com/questions/9992078/converting-a-uiimage-blackn-white-and-not-grayscale-for-using-tesseract alloc init stillImageFilter.threshold 0.5 stillImageSource addTarget stillImageFilter stillImageSource processImage UIImage imageWithAppliedThreshold stillImageFilter imageFromCurrentlyProcessedOutput You can just pass your color image..
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