Adding the Image in bundle to the UIImageView using GPU Image? <p>I am very new to the user of GPU Image Framework. In my application I use the following code to get the filter effect of the Image in bundle(knee.png) , But I get only Black ImageView . I get the code from this <a href="http://stackoverflow.com/questions/12935166/gpuimage-imagebyfilteringimage-and-imagefromcurrentlyprocessedoutputwithorienta">link</a> </p> <p>show me where I went wrong </p> <pre><code>UIImage *inputImage = [UIImage imageNamed:@"knee.png"]; GPUImagePicture *stillImageSource = [[GPUImagePicture alloc] initWithImage:inputImage]; GPUImageSepiaFilter *stillImageFilter = [[GPUImageSepiaFilter alloc] init]; [stillImageSource addTarget:stillImageFilter]; [stillImageSource processImage]; UIImage *quickFilteredImage = [stillImageFilter imageByFilteringImage:inputImage]; [self.imgView setImage:quickFilteredImage]; </code></pre>