2014/10/15 下午 10:10:34

iphone Programming Glossary: invert

http://stackoverflow.com/questions/11154585/face-detection-issue-using-cidetector

and mouth coordinates. I have seen 2 3 sample codes for this but all are approximately same in all codes we have to invert my view for matching the coordinates which i dont want because my view have some other controls. And one more thing they.. eyes and mouth coordinates wrong. I had started my code from this sample code but in this also view is being invert its Y coordinate. Can any one help me how can i detect the face eyes and mouth position on UIImageView's image without invert.. its Y coordinate. Can any one help me how can i detect the face eyes and mouth position on UIImageView's image without invert my self.view. let me know if my question is not clear enough. Any help would be appreciated Thanks in advance iphone objective..

Flipped NSString drawing in CGContext

http://stackoverflow.com/questions/1252343/flipped-nsstring-drawing-in-cgcontext

share improve this question As describe here the coordinate system for a context within a UIView or its layer is inverted when compared to the normal Quartz drawing space. However when using Quartz to draw to an image this is no longer the.. case. The UIStringDrawing Cocoa Touch category on NSString that gives you the drawAtPoint withFont method assumes an inverted layout and that's why you're seeing the flipped text in your image. One way to work around this would be to save the graphics.. you're seeing the flipped text in your image. One way to work around this would be to save the graphics state apply an invert transform to the image draw the text and restore the old graphics state. This would look something like the following CGContextSaveGState..

Get directory contents in date modified order

http://stackoverflow.com/questions/1523793/get-directory-contents-in-date-modified-order

NSDictionary dictionaryWithObjectsAndKeys file @ path modDate @ lastModDate nil sort using a block order inverted as we want latest date first NSArray sortedFiles filesAndProperties sortedArrayUsingComparator ^ id path1 id path2 .. compare NSComparisonResult comp path1 objectForKey @ lastModDate compare path2 objectForKey @ lastModDate invert ordering if comp NSOrderedDescending comp NSOrderedAscending else if comp NSOrderedAscending comp NSOrderedDescending..

Apple gyroscope sample code

http://stackoverflow.com/questions/3245733/apple-gyroscope-sample-code

rotMatrix 12 0 rotMatrix 13 0 rotMatrix 14 0 rotMatrix 15 1 Depending on what you want to do with that you may have to invert it which is very easy. The inverse of a rotation is just its transpose which means swapping the columns and rows. So the..

Drawing in CATiledLayer with CoreGraphics CGContextDrawImage

http://stackoverflow.com/questions/4067512/drawing-in-catiledlayer-with-coregraphics-cgcontextdrawimage

length CGContextRestoreGState context CGContextRestoreGState context As you can see I am using a Scale transform to invert the coordinate system and a translation transform to shift the origin to the lower left corner. The images draw correctly..

Create layer mask with custom-shaped hole

http://stackoverflow.com/questions/5721196/create-layer-mask-with-custom-shaped-hole

colors around...from white to black to clear for fill and background. A simple solution if it existed would be to invert the area of the UIBezierPath. I've tried clipping as well using the path...but no luck. I'm hoping that it's something simple..

Is programmatically inverting the colors of an image possible?

http://stackoverflow.com/questions/6672517/is-programmatically-inverting-the-colors-of-an-image-possible

programmatically inverting the colors of an image possible I want to take an image and invert the colors in iOS. iphone ios ipad uiimage share.. programmatically inverting the colors of an image possible I want to take an image and invert the colors in iOS. iphone ios ipad uiimage share improve this question To expand on quixoto's answer and because I.. the memory of draws the UIImage to it runs through every pixel converting from premultiplied alpha to uninflected RGB inverting each channel separately multiplying by alpha again and storing back gets an image from the context and wraps it into..

Use the x-ray or thermal effect on iPhone

http://stackoverflow.com/questions/6704976/use-the-x-ray-or-thermal-effect-on-iphone

1 1 1 1 1 1 I have been change around the numbers but nothing works right it just turns the screen white. When you invert something in Photoshop it gives it a thermal look that is my thought process. Thank you very much Joe iphone camera share..

OpenGL ES 2.0 / MonoTouch: Texture is colorized red

http://stackoverflow.com/questions/7986153/opengl-es-2-0-monotouch-texture-is-colorized-red

imageSize.Height ctxt.DrawImage rect inImage.CGImage var data ctxt.Data return data I think the channels are inverted but maybe there is a way to invert the bitmap without some custom code. This is the image which is rendered ignore the.. rect inImage.CGImage var data ctxt.Data return data I think the channels are inverted but maybe there is a way to invert the bitmap without some custom code. This is the image which is rendered ignore the fancy model in front of it And the expected..