iOS - CIImage autoAdjustmentFilters leak - ios

Question

I'm using the auto enhance feature to improve a lot of images.
But it seems there is a big leak, so here's the code I'm using :
#import <CoreImage/CoreImage.h>
#import <ImageIO/ImageIO.h>
#implementation UIImage (AutoEnhanced)
- (UIImage *)autoEnhancedImage
{
#autoreleasepool {
CIImage *ciOriginal = self.CIImage;
if(!ciOriginal) {
ciOriginal = [[CIImage alloc] initWithCGImage:self.CGImage];
}
NSDictionary *options = #{ CIDetectorImageOrientation : #(self.CGImagePropertyOrientation)};
NSArray *adjustments = [ciOriginal autoAdjustmentFiltersWithOptions:options];
for (CIFilter *filter in adjustments) {
[filter setValue:ciOriginal forKey:kCIInputImageKey];
ciOriginal = filter.outputImage;
}
CIContext *context = [CIContext contextWithOptions:nil];
CGImageRef cgImage = [context createCGImage:ciOriginal fromRect:ciOriginal.extent];
UIImage *enhancedImage = [[UIImage alloc] initWithCGImage:cgImage];
CGImageRelease(cgImage);
return enhancedImage;
}
}
- (CGImagePropertyOrientation)CGImagePropertyOrientation
{
switch (self.imageOrientation) {
case UIImageOrientationUp:
return kCGImagePropertyOrientationUp;
case UIImageOrientationUpMirrored:
return kCGImagePropertyOrientationUpMirrored;
case UIImageOrientationDown:
return kCGImagePropertyOrientationDown;
case UIImageOrientationDownMirrored:
return kCGImagePropertyOrientationDownMirrored;
case UIImageOrientationLeftMirrored:
return kCGImagePropertyOrientationLeftMirrored;
case UIImageOrientationRight:
return kCGImagePropertyOrientationRight;
case UIImageOrientationRightMirrored:
return kCGImagePropertyOrientationRightMirrored;
case UIImageOrientationLeft:
return kCGImagePropertyOrientationLeft;
}
}
#end
And here's the log from Instruments :
Even with an autoreleasepool, I can't fix it. Any idea would be very much appreciated ! Thanks !