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2014/10/15 ¤U¤È 10:09:30
iphone Programming Glossary: gaussianhttp://stackoverflow.com/questions/12257429/how-do-i-modify-a-gpuimagegaussianselectiveblurfilter-to-operate-over-a-rectangl do I modify a GPUImageGaussianSelectiveBlurFilter to operate over a rectangle instead of a circle I have used the GPUImage framework for a blur effect.. effects is a selective blur effect in which only a small part of the image is clear the rest is blurred. The GPUImageGaussianSelectiveBlurFilter chooses the circular part of the image to not be blurred. How can I alter this to make the sharp region.. distanceFromCenter This fragment shader takes in a pixel color value from both the original sharp image and a Gaussian blurred version of the image. It then blends between these based on the logic of the last three lines. The first and second..
http://stackoverflow.com/questions/1356250/iphone-blur-uiimage Blur UIImage In my iPhone application I have a black and white UIImage . I need to blur that image Gaussian blur would do . iPhone clearly knows how to blur images as it does that when it draws shadows . However I did not found.. quartz 2d share improve this question Try this found here @interface UIImage ImageBlur UIImage imageWithGaussianBlur @end @implementation UIImage ImageBlur UIImage imageWithGaussianBlur float weight 5 0.2270270270 0.1945945946 0.1216216216.. @interface UIImage ImageBlur UIImage imageWithGaussianBlur @end @implementation UIImage ImageBlur UIImage imageWithGaussianBlur float weight 5 0.2270270270 0.1945945946 0.1216216216 0.0540540541 0.0162162162 Blur horizontally UIGraphicsBeginImageContext..
How do I create blurred text in an iPhone view? http://stackoverflow.com/questions/227305/how-do-i-create-blurred-text-in-an-iphone-view to display some text in the view with a blurry copy of the text behind it but not just a text shadow. How do I apply Gaussian blurred text onto a UIImage or layer iphone objective c cocoa touch graphics uikit share improve this question Take..
Gaussian filter with OpenGL Shaders http://stackoverflow.com/questions/4804732/gaussian-filter-with-opengl-shaders filter with OpenGL Shaders I am trying to learn Shaders to implement something in my iPhone app. So far I have understood.. modification of the colors of the same pixel But how about Convolutions . For example the easiest example would the Gaussian filter in where output image pixel O x y depends not only on I x y but also on surrounding 8 pixels. O x y I x y surrounding..
Blur Effect (Wet in Wet effect) in Paint Application Using OpenGL-ES http://stackoverflow.com/questions/6980402/blur-effect-wet-in-wet-effect-in-paint-application-using-opengl-es Application Using OpenGL ES I am developing Paint application using OpenGL ES for iPhone and i want to implement Gaussian blur effect Wet in Wet for painting. Please have look at the image describing my requirement for Blur effect I tried to.. to render the same brush stroke many times pixels apart to get the effect you want. If you jitter the renders with a Gaussian distribution you will get a Gaussian blur. This would be similar to jitter antialiasing with an accumulation buffer but.. times pixels apart to get the effect you want. If you jitter the renders with a Gaussian distribution you will get a Gaussian blur. This would be similar to jitter antialiasing with an accumulation buffer but instead of using subpixel offsets you..
How to implement a box or gaussian blur on iPhone http://stackoverflow.com/questions/1140117/how-to-implement-a-box-or-gaussian-blur-on-iphone to implement a box or gaussian blur on iPhone I want to be able to take an image and blur it relatively quickly say in 0.1 sec . Image size would almost.. neighbors or is there a higher level way that I could do this PS I am aware that multiple box blurs can approximate a gaussian blur. iphone image processing blur share improve this question I found a really fast pretty crappy way for iOS3.2 apps..
Create a mask from difference between two images (iPhone) http://stackoverflow.com/questions/3901404/create-a-mask-from-difference-between-two-images-iphone 2 images creating a mask of the area that's different in order to process the area that's common to both images gaussian blur for example EDIT I'm currently using this code to get the RGBA value of pixels NSArray getRGBAsFromImage UIImage image..
OpenGL ES 2.0 fragment shader to blur is slow and low quality http://stackoverflow.com/questions/4355525/opengl-es-2-0-fragment-shader-to-blur-is-slow-and-low-quality 0.234375 gaussFilter 5 vec2 2.0 0.09375 gaussFilter 6 vec2 3.0 0.015625 highp float blurSize blurAmount 1.0 7x1 gaussian blur fragment shader highp vec4 color vec4 0 0 0 1 for int i 0 i 7 i color texture2D texture vec2 fragTexCoord.x gaussFilter..
Blur an UIImage on change of slider http://stackoverflow.com/questions/8758433/blur-an-uiimage-on-change-of-slider an UIImage on change of slider I have tried gaussian blur and checked out all the questions on stackoverflow but no one of them solved my crash issue.Please help is there is.. stackoverflow but no one of them solved my crash issue.Please help is there is any other way to blur image other than gaussian blur algorithm. My image size is 768x1024 and the loops iterates for 2 1024 768 times and this is not feasible. CGContextRef..
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