core image几个滤镜例子 oc版本和swift版本

oc版本

//万花筒模式
+ (CGImageRef) getKaleidoscope:(CIContext *)context
{
CIImage * image =
[CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];

CIFilter * kaleidoscope = [CIFilter filterWithName:@"CIKaleidoscope"];
[kaleidoscope setDefaults];
[kaleidoscope setValue:image forKey:kCIInputImageKey];
[kaleidoscope setValue:[CIVector vectorWithX:5 Y:0] forKey:kCIInputCenterKey];
CIImage * result = [kaleidoscope valueForKey:kCIOutputImageKey];

CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];

return cgImage;
}

//凹凸变形
+ (CGImageRef) getBumpDistortion:(CIContext *)context
{
CIImage * image =
[CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * bumpDistortion = [CIFilter filterWithName:@"CIBumpDistortion"];
[bumpDistortion setDefaults];
[bumpDistortion setValue:image forKey:kCIInputImageKey];
[bumpDistortion setValue:[CIVector vectorWithX:10 Y:5] forKey:kCIInputCenterKey];
[bumpDistortion setValue:@55.0f forKey:kCIInputRadiusKey];
[bumpDistortion setValue:@(3.0f) forKey:kCIInputScaleKey];
CIImage * result = [bumpDistortion valueForKey:kCIOutputImageKey];

CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

//色调调整
+ (CGImageRef) getHueAdjust:(CIContext *)context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * hueAdjust = [CIFilter filterWithName:@"CIHueAdjust"];
[hueAdjust setValue:image forKey:kCIInputImageKey];
[hueAdjust setValue:@2.094f forKey:kCIInputAngleKey];
CIImage * result = [hueAdjust valueForKey:kCIOutputImageKey];
CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

//变暗
+ (CGImageRef) getGloom:(CIContext *) context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * gloom = [CIFilter filterWithName:@"CIGloom"];
[gloom setDefaults];
[gloom setValue:image forKey:kCIInputImageKey];
[gloom setValue:@5.0f forKey:kCIInputRadiusKey];
[gloom setValue:@1.0f forKey:kCIInputIntensityKey];
CIImage * result = [gloom valueForKey:kCIOutputImageKey];
CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

//深褐色调
+ (CGImageRef) getSepiaTone:(CIContext *) context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * sepiaTone = [CIFilter filterWithName:@"CISepiaTone"];
[sepiaTone setDefaults];
[sepiaTone setValue:image forKey:kCIInputImageKey];
[sepiaTone setValue:@0.8f forKey:kCIInputIntensityKey];
CIImage * result = [sepiaTone valueForKey:kCIOutputImageKey];
CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

//合成
+ (CGImageRef) getAdditionCompositing:(CIContext *) context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];

CIImage * image1 = [CIImage imageWithCGImage:[UIImage imageNamed:@"ren"].CGImage];

CIFilter * accordionFoldTransition = [CIFilter filterWithName:@"CIAdditionCompositing"];
[accordionFoldTransition setDefaults];
[accordionFoldTransition setValue:image forKey:kCIInputImageKey];
[accordionFoldTransition setValue:image1 forKey:kCIInputBackgroundImageKey];
CIImage * result = [accordionFoldTransition valueForKey:kCIOutputImageKey];
CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}
//高斯模糊
+ (CGImageRef) getGaussianBlur:(CIContext *) context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * gaussianBlur = [CIFilter filterWithName:@"CIGaussianBlur"];
[gaussianBlur setDefaults];
[gaussianBlur setValue:image forKey:kCIInputImageKey];
[gaussianBlur setValue:@5.0f forKey:kCIInputRadiusKey];

CIImage * result = [gaussianBlur valueForKey:kCIOutputImageKey];
CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

//变焦模糊
+ (CGImageRef) getZoomBlur:(CIContext *) context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * zoomBlur = [CIFilter filterWithName:@"CIZoomBlur"];
[zoomBlur setDefaults];
[zoomBlur setValue:image forKey:kCIInputImageKey];
[zoomBlur setValue:@10.0f forKey:@"inputAmount"];
[zoomBlur setValue:[CIVector vectorWithCGPoint:CGPointMake(10, 10)] forKey:kCIInputCenterKey];

CIImage * result = [zoomBlur valueForKey:kCIOutputImageKey];
CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

//白点调整
+ (CGImageRef) getWhitePointAdjust:(CIContext *) context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * zoomBlur = [CIFilter filterWithName:@"CIWhitePointAdjust"];
[zoomBlur setDefaults];
[zoomBlur setValue:image forKey:kCIInputImageKey];
[zoomBlur setValue:[CIColor colorWithRed:1.0 green:0.5 blue:1.0 alpha:1.0] forKey:@"inputColor"];

CIImage * result = [zoomBlur valueForKey:kCIOutputImageKey];
CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

//标签效应
+ (CGImageRef) getVignetteEffect:(CIContext *) context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * zoomBlur = [CIFilter filterWithName:@"CIVignetteEffect"];
[zoomBlur setDefaults];
[zoomBlur setValue:image forKey:kCIInputImageKey];
[zoomBlur setValue:[CIVector vectorWithCGPoint:CGPointMake(10, 10)] forKey:kCIInputCenterKey];
[zoomBlur setValue:@0.5f forKey:@"inputFalloff"];
[zoomBlur setValue:@1.0f forKey:@"inputIntensity"];
[zoomBlur setValue:@100.0f forKey:@"inputRadius"];

CIImage * result = [zoomBlur valueForKey:kCIOutputImageKey];
CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

//多个效果合成
+ (CGImageRef) getMix:(CIContext *) context
{
CIImage * image = [CIImage imageWithCGImage:[UIImage imageNamed:@"Icon"].CGImage];
CIFilter * zoomBlur = [CIFilter filterWithName:@"CIVignetteEffect"];
[zoomBlur setDefaults];
[zoomBlur setValue:image forKey:kCIInputImageKey];
[zoomBlur setValue:[CIVector vectorWithCGPoint:CGPointMake(10, 10)] forKey:kCIInputCenterKey];
[zoomBlur setValue:@0.5f forKey:@"inputFalloff"];
[zoomBlur setValue:@1.0f forKey:@"inputIntensity"];
[zoomBlur setValue:@100.0f forKey:@"inputRadius"];

CIImage * result = [zoomBlur valueForKey:kCIOutputImageKey];

CIFilter * gaussianBlur = [CIFilter filterWithName:@"CIGaussianBlur"];
[gaussianBlur setDefaults];
[gaussianBlur setValue:result forKey:kCIInputImageKey];
[gaussianBlur setValue:@5.0f forKey:kCIInputRadiusKey];

result = [gaussianBlur valueForKey:kCIOutputImageKey];

CGRect extent = [result extent];
CGImageRef cgImage = [context createCGImage:result fromRect:extent];
return cgImage;
}

以上介绍了几个滤镜模式，如果想查询系统内置了多少种滤镜，可以执行以下代码查看：

//查看所有内置滤镜

NSArray *filterNames=[CIFilterfilterNamesInCategory:kCICategoryBuiltIn];
for (NSString *filterNamein filterNames) {
CIFilter *filter=[CIFilterfilterWithName:filterName];
NSLog(@"\rfilter:%@\rattributes:%@",filterName,[filterattributes]);
}

下面截取控制台输出的部分滤镜消息。



就拿CIZoomBlur滤镜模式来说，打印出来的信息，可以看到，里面定义了一些属性（每种滤镜，所含有的属性会有差别，在使用的时候，特别要注意）。
属性名称可以使用定义好的结构体成员kCIInputImageKey，或者直接@"inputImage"调用，都是表示输入的图片。inputImage对应的value里面定义了这个属性是什么类型的，属性描述等。如果需要其他滤镜模式的可以去查看。

swift版本

//万花筒模式
static func getKaleidoscope(context: CIContext) -> CGImageRef {

let imageName = UIImage(named:"Icon")?.CGImage

let image = CIImage(CGImage: (imageName)!)

let kaleidoscope  = CIFilter(name:"CIKaleidoscope");
kaleidoscope?.setDefaults();
kaleidoscope?.setValue(image, forKey: kCIInputImageKey);
kaleidoscope?.setValue(CIVector(x: 5, y: 0), forKey: kCIInputCenterKey);

let result  = kaleidoscope?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;

let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//凹凸变形
static func getBumpDistortion(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)

let bumpDistortion = CIFilter(name: "CIBumpDistortion")
bumpDistortion?.setDefaults()
bumpDistortion?.setValue(image, forKey: kCIInputImageKey)
bumpDistortion?.setValue(CIVector(x: 10, y: 5), forKey: kCIInputCenterKey)
bumpDistortion?.setValue(55.0, forKey: kCIInputRadiusKey)
bumpDistortion?.setValue(3.0, forKey: kCIInputScaleKey)
let result  = bumpDistortion?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//色调调整
static func getHueAdjust(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)
let hueAdjust = CIFilter(name: "CIHueAdjust")
hueAdjust?.setValue(image, forKey: kCIInputImageKey)
hueAdjust?.setValue(2.094, forKey:kCIInputAngleKey)

let result  = hueAdjust?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//变暗
static func getGloom(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)

let gloom = CIFilter(name: "CIGloom")
gloom?.setDefaults()
gloom?.setValue(image, forKey: kCIInputImageKey)
gloom?.setValue(5.0, forKey: kCIInputRadiusKey)
gloom?.setValue(1.0, forKey: kCIInputIntensityKey)

let result  = gloom?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//深褐色调
static func getSepiaTone(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)

let sepiaTone = CIFilter(name: "CISepiaTone")
sepiaTone?.setDefaults()
sepiaTone?.setValue(image, forKey: kCIInputImageKey)
sepiaTone?.setValue(0.8, forKey: kCIInputIntensityKey)

let result  = sepiaTone?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//合成
static func getAdditionCompositing(context: CIContext) -> CGImageRef {

let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)
let image1 = CIImage(CGImage: (UIImage(named:"ren")?.CGImage)!)

let accordionFoldTransition = CIFilter(name: "CIAdditionCompositing");
accordionFoldTransition?.setDefaults()
accordionFoldTransition?.setValue(image, forKey: kCIInputImageKey)
accordionFoldTransition?.setValue(image1, forKey: kCIInputBackgroundImageKey)

let result  = accordionFoldTransition?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//高斯模糊
static func getGaussianBlur(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)

let gaussianBlur = CIFilter(name: "CIGaussianBlur")
gaussianBlur?.setDefaults()
gaussianBlur?.setValue(image, forKey: kCIInputImageKey)
gaussianBlur?.setValue(5.0, forKey: kCIInputRadiusKey)

let result  = gaussianBlur?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//变焦模糊
static func getZoomBlur(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)

let zoomBlur = CIFilter(name: "CIZoomBlur")
zoomBlur?.setDefaults()
zoomBlur?.setValue(image, forKey: kCIInputImageKey)
zoomBlur?.setValue(10.0, forKey: "inputAmount")
zoomBlur?.setValue(CIVector(x: 10, y: 10), forKey: kCIInputCenterKey)

let result  = zoomBlur?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//白点调整
static func getWhitePointAdjust(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)

let whitePointAdjust = CIFilter(name: "CIWhitePointAdjust")
whitePointAdjust?.setDefaults()
whitePointAdjust?.setValue(image, forKey: kCIInputImageKey)
whitePointAdjust?.setValue(CIColor(red: 1.0, green: 0.5, blue: 1.0, alpha: 1.0), forKey: "inputColor")

let result  = whitePointAdjust?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//标签效应
static func getVignetteEffect(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)
let vignetteEffect = CIFilter(name: "CIVignetteEffect")
vignetteEffect?.setDefaults()
vignetteEffect?.setValue(image, forKey: kCIInputImageKey)
vignetteEffect?.setValue(CIVector(x: 10, y: 10), forKey: kCIInputCenterKey)
vignetteEffect?.setValue(0.5, forKey: "inputFalloff")
vignetteEffect?.setValue(1.0, forKey: "inputIntensity")
vignetteEffect?.setValue(100.0, forKey: "inputRadius")

let result  = vignetteEffect?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

//多个效果合成
static func getMix(context: CIContext) -> CGImageRef {
let imageName = UIImage(named:"Icon")?.CGImage
let image = CIImage(CGImage: (imageName)!)

let vignetteEffect = CIFilter(name: "CIVignetteEffect")
vignetteEffect?.setDefaults()
vignetteEffect?.setValue(image, forKey: kCIInputImageKey)
vignetteEffect?.setValue(0.5, forKey: "inputFalloff")
vignetteEffect?.setValue(1.0, forKey: "inputIntensity")
vignetteEffect?.setValue(100.0, forKey: "inputRadius")

var result  = vignetteEffect?.valueForKey(kCIOutputImageKey);

let gaussianBlur = CIFilter(name: "CIGaussianBlur")
gaussianBlur?.setDefaults()
gaussianBlur?.setValue(result, forKey: kCIInputImageKey)
gaussianBlur?.setValue(5.0, forKey: kCIInputRadiusKey)

result = gaussianBlur?.valueForKey(kCIOutputImageKey);

let extent = result?.extent;
let cgImage = context.createCGImage(result as! CIImage, fromRect: extent!)
return cgImage
}

以上介绍了几个滤镜模式，如果想查询系统内置了多少种滤镜，可以执行以下代码查看：

//查看所有内置滤镜

let filterNames = CIFilter.filterNamesInCategory(kCICategoryBuiltIn)

for filterName in filterNames {
let filter = CIFilter(name: filterName)
print("\rfilter:\(filterName)\rattributes:\(filter?.attributes)")
}

下面截取控制台输出的部分滤镜消息。



就拿CIZoomBlur滤镜模式来说，打印出来的信息，可以看到，里面定义了一些属性（每种滤镜，所含有的属性会有差别，在使用的时候，特别要注意）。
属性名称可以使用定义好的结构体成员kCIInputImageKey，或者直接"inputImage"调用，都是表示输入的图片。inputImage对应的value里面定义了这个属性是什么类型的，属性描述等。如果需要其他滤镜模式的可以去查看。

工程下载地址：http://download.csdn.net/detail/xiaopingping1234567/9458261