CIImage *saveToSave = [filter outputImage];CGImageRef cgImg = [context createCGImage:saveToSave fromRect:[saveToSave extent]];
ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:cgImg                              metadata:[saveToSave properties]                       completionBlock:^(NSURL *assetURL, NSError *error) {                                       CGImageRelease(cgImg);
                              }];