About

A simplified UIImage category for using Core Image Filters. To accomplish vintage or double exposure effects I am using blend modes using two images.

Vintage

Vignette

Double Exposure using Blend Modes

Black & White

How to use on your project

• Drag UIImage+Filters.h and UIImage+Filters.m to your project
• Include the header file #import "UIImage+Filters.h"
• Be sure to include the CoreImage.framework on your project
• To apply a filter to an UIImage just to this

Sample Code

UIImage* myImage  = [UIImage imageNamed:@"myphoto.jpg"];
myImage = [myImage saturateImage:0 withContrast:1.05];

Current Filters

- (UIImage*) saturateImage:(float)saturationAmount withContrast:(float)contrastAmount;
- (UIImage*) vignetteWithRadius:(float)inputRadius andIntensity:(float)inputIntensity;
- (UIImage*) blendMode:(NSString *)blendMode withImageNamed:(NSString *) imageName;
- (UIImage*) curveFilter;

Blend Mode

- (UIImage*) blendMode:(NSString *)blendMode withImageNamed:(NSString *) imageName;

Will use imageName as a background layer to blendit into your image.

Available blend modes you can use are:

• CISoftLightBlendMode
• CIMultiplyBlendMode
• CISaturationBlendMode
• CIScreenBlendMode
• CIMultiplyCompositing
• CIHardLightBlendMode

Apple Documentation

Core Image Filter Reference