Memory Leak CGBitmapContextCreateImage - iphone

Question

In Instruments it tells me that there is a leak caused by CGBitmapContextCreateImage in my resizedImage method. However after a lot of research and trial and error, I have come to the conclusion that it is caused somewhere else in the call chain.
The call chain is as follows:
takeFoto -> saveFoto -> setImage_bg -> bolly -> resizedImage
Here is all the related code
-(void)takeFoto
{
[stillImageOutput captureStillImageAsynchronouslyFromConnection:self.videoConnection completionHandler:
^(CMSampleBufferRef imageSampleBuffer, NSError *error)
{
NSData* idata = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageSampleBuffer];//[od copy];
UIImage *image = [UIImage imageWithData:idata];
CGImageRef cgi = [image CGImage];
CGImageRef cgi2 = CGImageCreateWithImageInRect(cgi, CGRectMake(0, 0, CGImageGetWidth(cgi), CGImageGetHeight(cgi));
UIImageOrientation iori;
if(self.devOri==UIInterfaceOrientationLandscapeRight)
{
if([self isFrontCamera]) iori = UIImageOrientationDownMirrored;
else iori = UIImageOrientationUp;
}
else if(self.devOri==UIInterfaceOrientationLandscapeLeft)
{
if([self isFrontCamera]) iori = UIImageOrientationUpMirrored;
else iori = UIImageOrientationDown;
}
else if(self.devOri==UIInterfaceOrientationPortraitUpsideDown)
{
if([self isFrontCamera]) iori = UIImageOrientationRightMirrored;
else iori = UIImageOrientationLeft;
}
else
{
if([self isFrontCamera]) iori = UIImageOrientationLeftMirrored;
else iori = UIImageOrientationRight;
}
UIImage *scaledImage = [[UIImage alloc] initWithCGImage:cgi2 scale:1 orientation:iori];
CGImageRelease(cgi2);
self.foto = scaledImage;
[scaledImage release];
[parent saveFoto];
}];
}
-(void)saveFoto
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
[self setImage_bg:captureManager.foto];
[pool release];
}
-(void)setImage_bg:(UIImage*)oimg
{
CGSize sz = savePreview.frame.size;
UIImage* img = [oimg copy];
[savePreview setImage:[filters resizeImage:img size:sz]];
sz = CGSizeMake(64, 64);
UIImage* img2 = [filters resizeImage:img size:sz];
bolPrv.image = [filters bolly:img2];
[img release];
}
//filters bolly
-(UIImage*)bolly:(UIImage*)img
{
CIImage *beginImage = [CIImage imageWithCGImage:img.CGImage];
CIContext *context = [CIContext contextWithOptions:nil];
UIImage* bb = [UIImage fromFile:#"bollywoodBlend3.png"];
UIImage* bb2 = [bb resizedImage:img.size interpolationQuality:kCGInterpolationMedium];
CIFilter *filter = [CIFilter filterWithName:#"CIOverlayBlendMode"
keysAndValues: kCIInputImageKey, beginImage,
#"inputBackgroundImage", [CIImage imageWithCGImage:bb2.CGImage], nil];
CIImage *outputImage = filter.outputImage;
filter = [CIFilter filterWithName:#"CIColorControls"
keysAndValues: kCIInputImageKey, outputImage,
#"inputSaturation", [NSNumber numberWithFloat:1.8],
#"inputBrightness", [NSNumber numberWithFloat:0.1],
#"inputContrast", [NSNumber numberWithFloat:1.5],
nil];
outputImage = filter.outputImage;
CGImageRef cgimg = [context createCGImage:outputImage fromRect:[outputImage extent]];
UIImage *newImg = [UIImage imageWithCGImage:cgimg];
CGImageRelease(cgimg);
return [newImg autorelease];
}
// filters resizeImage (same code used for resizedImage)
- (UIImage *)resizeImage:(UIImage*)img size:(CGSize)newSize
{
CGRect newRect = CGRectIntegral(CGRectMake(0, 0, newSize.width, newSize.height));
CGImageRef imageRef = img.CGImage;
// Build a context that's the same dimensions as the new size
CGColorSpaceRef csr = CGImageGetColorSpace(imageRef);
CGContextRef bitmap = CGBitmapContextCreate(NULL,
newRect.size.width,
newRect.size.height,
CGImageGetBitsPerComponent(imageRef),
4*newRect.size.width,
csr,
CGImageGetBitmapInfo(imageRef));
// Draw into the context; this scales the image
CGContextDrawImage(bitmap, newRect, imageRef);
// CGImageSourceCreateThumbnailAtIndex
// Get the resized image from the context and a UIImage
CGImageRef newImageRef = CGBitmapContextCreateImage(bitmap);
UIImage *newImage = [UIImage imageWithCGImage:newImageRef scale:img.scale orientation:img.imageOrientation];
// Clean up
CGImageRelease(newImageRef);
CGContextRelease(bitmap);
return newImage;
}
- (UIImage *)resizedImage:(CGSize)newSize
transform:(CGAffineTransform)transform
drawTransposed:(BOOL)transpose
interpolationQuality:(CGInterpolationQuality)quality
{
CGRect newRect = CGRectIntegral(CGRectMake(0, 0, newSize.width, newSize.height));
CGRect transposedRect = CGRectMake(0, 0, newRect.size.height, newRect.size.width);
CGImageRef imageRef = self.CGImage;
// Build a context that's the same dimensions as the new size
CGColorSpaceRef csr = CGImageGetColorSpace(imageRef);
CGContextRef bitmap = CGBitmapContextCreate(NULL,
newRect.size.width,
newRect.size.height,
CGImageGetBitsPerComponent(imageRef),
4*newRect.size.width,
csr,
CGImageGetBitmapInfo(imageRef));
// Rotate and/or flip the image if required by its orientation
CGContextConcatCTM(bitmap, transform);
// Set the quality level to use when rescaling
CGContextSetInterpolationQuality(bitmap, quality);
// Draw into the context; this scales the image
CGContextDrawImage(bitmap, transpose ? transposedRect : newRect, imageRef);
// CGImageSourceCreateThumbnailAtIndex
// Get the resized image from the context and a UIImage
CGImageRef newImageRef = CGBitmapContextCreateImage(bitmap);
UIImage *newImage = [UIImage imageWithCGImage:newImageRef];
// Clean up
CGImageRelease(newImageRef);
CGContextRelease(bitmap);
return newImage;
}
// UIImage from file
+(UIImage*)fromFile:(NSString*)fname
{
NSString* bundlePath = [[NSBundle mainBundle] bundlePath];
return [UIImage imageWithContentsOfFile:[NSString stringWithFormat:#"%#/%#", bundlePath,fname]];
}