GPUImage 的部分使用和介绍

来源：互联网发布：西厢记赏析网络课答案编辑：程序博客网时间：2024/05/17 18:12
使用 GPUImage了。一个示例代码：
 1 - (void)viewDidLoad { 2     [super viewDidLoad]; 3      4     UIImage *inputImage = [UIImage imageNamed:@"zzy"]; 5     //创建一个亮度的滤镜 6 //    GPUImageBrightnessFilter *passthroughFilter = [[GPUImageBrightnessFilter alloc] init]; 7 //    passthroughFilter.brightness = -0.5f; 8 //    //设置要渲染的区域 9 //    [passthroughFilter forceProcessingAtSize:inputImage.size];10 //    [passthroughFilter useNextFrameForImageCapture];11 //    //获取数据源12 //    GPUImagePicture *stillImageSource = [[GPUImagePicture alloc]initWithImage:inputImage];13 //    //添加上滤镜14 //    [stillImageSource addTarget:passthroughFilter];15 //    //开始渲染16 //    [stillImageSource processImage];17 //    //获取渲染后的图片18 //    UIImage *newImage = [passthroughFilter imageFromCurrentFramebuffer];19 //    //加载出来20 //    UIImageView *imageView = [[UIImageView alloc] initWithImage:newImage];21 //    imageView.frame = CGRectMake(0,0,inputImage.size.width ,inputImage.size.height);22 //    [self.view addSubview:imageView];23     24     25     //GPUImageStretchDistortionFilter *disFilter =[[GPUImageStretchDistortionFilter alloc] init];26     //GPUImageBulgeDistortionFilter *disFilter = [[GPUImageBulgeDistortionFilter alloc] init];27     //GPUImagePinchDistortionFilter *disFilter = [[GPUImagePinchDistortionFilter alloc] init];28     //GPUImageGlassSphereFilter *disFilter = [[GPUImageGlassSphereFilter alloc] init];29     //GPUImageSphereRefractionFilter *disFilter = [[GPUImageSphereRefractionFilter alloc] init];30     //GPUImageToonFilter *disFilter = [[GPUImageToonFilter alloc] init];31     GPUImageVignetteFilter *disFilter = [[GPUImageVignetteFilter alloc] init];32     //设置要渲染的区域33     [disFilter forceProcessingAtSize:inputImage.size];34     [disFilter useNextFrameForImageCapture];35     //获取数据源36     GPUImagePicture *stillImageSource = [[GPUImagePicture alloc]initWithImage:inputImage];37     //添加上滤镜38     [stillImageSource addTarget:disFilter];39     //开始渲染40     [stillImageSource processImage];41     //获取渲染后的图片42     UIImage *newImage = [disFilter imageFromCurrentFramebuffer];43     //加载出来44     UIImageView *imageView = [[UIImageView alloc] initWithImage:newImage];45     imageView.frame = CGRectMake(50,50,inputImage.size.width ,inputImage.size.height);46     [self.view addSubview:imageView];47 }
GPUImage提供的过滤器很多，每个头文件就是一个过滤器，这里贴一个过滤器的简介：

#import "GLProgram.h"

 // Base classes
#import "GPUImageOpenGLESContext.h"
#import "GPUImageOutput.h"
#import "GPUImageView.h"
#import "GPUImageVideoCamera.h"
#import "GPUImageStillCamera.h"
#import "GPUImageMovie.h"
#import "GPUImagePicture.h"
#import "GPUImageRawDataInput.h"
#import "GPUImageRawDataOutput.h"
#import "GPUImageMovieWriter.h"
#import "GPUImageFilterPipeline.h"
#import "GPUImageTextureOutput.h"
#import "GPUImageFilterGroup.h"
#import "GPUImageTextureInput.h"
#import "GPUImageUIElement.h"
#import "GPUImageBuffer.h"

 // Filters
#import "GPUImageFilter.h"
#import "GPUImageTwoInputFilter.h"


#pragma mark - 调整颜色 Handle Color

#import "GPUImageBrightnessFilter.h"                //亮度
#import "GPUImageExposureFilter.h"                  //曝光
#import "GPUImageContrastFilter.h"                  //对比度
#import "GPUImageSaturationFilter.h"                //饱和度
#import "GPUImageGammaFilter.h"                     //伽马线
#import "GPUImageColorInvertFilter.h"               //反色
#import "GPUImageSepiaFilter.h"                     //褐色（怀旧）
#import "GPUImageLevelsFilter.h"                    //色阶
#import "GPUImageGrayscaleFilter.h"                 //灰度
#import "GPUImageHistogramFilter.h"                 //色彩直方图，显示在图片上
#import "GPUImageHistogramGenerator.h"              //色彩直方图
#import "GPUImageRGBFilter.h"                       //RGB
#import "GPUImageToneCurveFilter.h"                 //色调曲线
#import "GPUImageMonochromeFilter.h"                //单色
#import "GPUImageOpacityFilter.h"                   //不透明度
#import "GPUImageHighlightShadowFilter.h"           //提亮阴影
#import "GPUImageFalseColorFilter.h"                //色彩替换（替换亮部和暗部色彩）
#import "GPUImageHueFilter.h"                       //色度
#import "GPUImageChromaKeyFilter.h"                 //色度键
#import "GPUImageWhiteBalanceFilter.h"              //白平横
#import "GPUImageAverageColor.h"                    //像素平均色值
#import "GPUImageSolidColorGenerator.h"             //纯色
#import "GPUImageLuminosity.h"                      //亮度平均
#import "GPUImageAverageLuminanceThresholdFilter.h" //像素色值亮度平均，图像黑白（有类似漫画效果）

#import "GPUImageLookupFilter.h"                    //lookup 色彩调整
#import "GPUImageAmatorkaFilter.h"                  //Amatorka lookup
#import "GPUImageMissEtikateFilter.h"               //MissEtikate lookup
#import "GPUImageSoftEleganceFilter.h"              //SoftElegance lookup




#pragma mark - 图像处理 Handle Image

#import "GPUImageCrosshairGenerator.h"              //十字
#import "GPUImageLineGenerator.h"                   //线条

#import "GPUImageTransformFilter.h"                 //形状变化
#import "GPUImageCropFilter.h"                      //剪裁
#import "GPUImageSharpenFilter.h"                   //锐化
#import "GPUImageUnsharpMaskFilter.h"               //反遮罩锐化

#import "GPUImageFastBlurFilter.h"                  //模糊
#import "GPUImageGaussianBlurFilter.h"              //高斯模糊
#import "GPUImageGaussianSelectiveBlurFilter.h"     //高斯模糊，选择部分清晰
#import "GPUImageBoxBlurFilter.h"                   //盒状模糊
#import "GPUImageTiltShiftFilter.h"                 //条纹模糊，中间清晰，上下两端模糊
#import "GPUImageMedianFilter.h"                    //中间值，有种稍微模糊边缘的效果
#import "GPUImageBilateralFilter.h"                 //双边模糊
#import "GPUImageErosionFilter.h"                   //侵蚀边缘模糊，变黑白
#import "GPUImageRGBErosionFilter.h"                //RGB侵蚀边缘模糊，有色彩
#import "GPUImageDilationFilter.h"                  //扩展边缘模糊，变黑白
#import "GPUImageRGBDilationFilter.h"               //RGB扩展边缘模糊，有色彩
#import "GPUImageOpeningFilter.h"                   //黑白色调模糊
#import "GPUImageRGBOpeningFilter.h"                //彩色模糊
#import "GPUImageClosingFilter.h"                   //黑白色调模糊，暗色会被提亮
#import "GPUImageRGBClosingFilter.h"                //彩色模糊，暗色会被提亮
#import "GPUImageLanczosResamplingFilter.h"         //Lanczos重取样，模糊效果
#import "GPUImageNonMaximumSuppressionFilter.h"     //非最大抑制，只显示亮度最高的像素，其他为黑
#import "GPUImageThresholdedNonMaximumSuppressionFilter.h" //与上相比，像素丢失更多

#import "GPUImageSobelEdgeDetectionFilter.h"        //Sobel边缘检测算法(白边，黑内容，有点漫画的反色效果)
#import "GPUImageCannyEdgeDetectionFilter.h"        //Canny边缘检测算法（比上更强烈的黑白对比度）
#import "GPUImageThresholdEdgeDetectionFilter.h"    //阈值边缘检测（效果与上差别不大）
#import "GPUImagePrewittEdgeDetectionFilter.h"      //普瑞维特(Prewitt)边缘检测(效果与Sobel差不多，貌似更平滑)
#import "GPUImageXYDerivativeFilter.h"              //XYDerivative边缘检测，画面以蓝色为主，绿色为边缘，带彩色
#import "GPUImageHarrisCornerDetectionFilter.h"     //Harris角点检测，会有绿色小十字显示在图片角点处
#import "GPUImageNobleCornerDetectionFilter.h"      //Noble角点检测，检测点更多
#import "GPUImageShiTomasiFeatureDetectionFilter.h" //ShiTomasi角点检测，与上差别不大
#import "GPUImageMotionDetector.h"                  //动作检测
#import "GPUImageHoughTransformLineDetector.h"      //线条检测
 #import "GPUImageParallelCoordinateLineTransformFilter.h" //平行线检测

 #import "GPUImageLocalBinaryPatternFilter.h"        //图像黑白化，并有大量噪点

 #import "GPUImageLowPassFilter.h"                   //用于图像加亮
 #import "GPUImageHighPassFilter.h"                  //图像低于某值时显示为黑


 #pragma mark - 视觉效果 Visual Effect

 #import "GPUImageSketchFilter.h"                    //素描
 #import "GPUImageThresholdSketchFilter.h"           //阀值素描，形成有噪点的素描
 #import "GPUImageToonFilter.h"                      //卡通效果（黑色粗线描边）
 #import "GPUImageSmoothToonFilter.h"                //相比上面的效果更细腻，上面是粗旷的画风
 #import "GPUImageKuwaharaFilter.h"                  //桑原(Kuwahara)滤波,水粉画的模糊效果；处理时间比较长，慎用

 #import "GPUImageMosaicFilter.h"                    //黑白马赛克
 #import "GPUImagePixellateFilter.h"                 //像素化
 #import "GPUImagePolarPixellateFilter.h"            //同心圆像素化
 #import "GPUImageCrosshatchFilter.h"                //交叉线阴影，形成黑白网状画面
 #import "GPUImageColorPackingFilter.h"              //色彩丢失，模糊（类似监控摄像效果）

 #import "GPUImageVignetteFilter.h"                  //晕影，形成黑色圆形边缘，突出中间图像的效果
 #import "GPUImageSwirlFilter.h"                     //漩涡，中间形成卷曲的画面
 #import "GPUImageBulgeDistortionFilter.h"           //凸起失真，鱼眼效果
 #import "GPUImagePinchDistortionFilter.h"           //收缩失真，凹面镜
 #import "GPUImageStretchDistortionFilter.h"         //伸展失真，哈哈镜
 #import "GPUImageGlassSphereFilter.h"               //水晶球效果
 #import "GPUImageSphereRefractionFilter.h"          //球形折射，图形倒立

 #import "GPUImagePosterizeFilter.h"                 //色调分离，形成噪点效果
 #import "GPUImageCGAColorspaceFilter.h"             //CGA色彩滤镜，形成黑、浅蓝、紫色块的画面
 #import "GPUImagePerlinNoiseFilter.h"               //柏林噪点，花边噪点
 #import "GPUImage3x3ConvolutionFilter.h"            //3x3卷积，高亮大色块变黑，加亮边缘、线条等
 #import "GPUImageEmbossFilter.h"                    //浮雕效果，带有点3d的感觉
 #import "GPUImagePolkaDotFilter.h"                  //像素圆点花样
 #import "GPUImageHalftoneFilter.h"                  //点染,图像黑白化，由黑点构成原图的大致图形


 #pragma mark - 混合模式 Blend

 #import "GPUImageMultiplyBlendFilter.h"             //通常用于创建阴影和深度效果
 #import "GPUImageNormalBlendFilter.h"               //正常
 #import "GPUImageAlphaBlendFilter.h"                //透明混合,通常用于在背景上应用前景的透明度
 #import "GPUImageDissolveBlendFilter.h"             //溶解
 #import "GPUImageOverlayBlendFilter.h"              //叠加,通常用于创建阴影效果
 #import "GPUImageDarkenBlendFilter.h"               //加深混合,通常用于重叠类型
 #import "GPUImageLightenBlendFilter.h"              //减淡混合,通常用于重叠类型
 #import "GPUImageSourceOverBlendFilter.h"           //源混合
 #import "GPUImageColorBurnBlendFilter.h"            //色彩加深混合
 #import "GPUImageColorDodgeBlendFilter.h"           //色彩减淡混合
 #import "GPUImageScreenBlendFilter.h"               //屏幕包裹,通常用于创建亮点和镜头眩光
 #import "GPUImageExclusionBlendFilter.h"            //排除混合
 #import "GPUImageDifferenceBlendFilter.h"           //差异混合,通常用于创建更多变动的颜色
 #import "GPUImageSubtractBlendFilter.h"             //差值混合,通常用于创建两个图像之间的动画变暗模糊效果
 #import "GPUImageHardLightBlendFilter.h"            //强光混合,通常用于创建阴影效果
 #import "GPUImageSoftLightBlendFilter.h"            //柔光混合
 #import "GPUImageChromaKeyBlendFilter.h"            //色度键混合
 #import "GPUImageMaskFilter.h"                      //遮罩混合
 #import "GPUImageHazeFilter.h"                      //朦胧加暗
 #import "GPUImageLuminanceThresholdFilter.h"        //亮度阈
 #import "GPUImageAdaptiveThresholdFilter.h"         //自适应阈值
 #import "GPUImageAddBlendFilter.h"                  //通常用于创建两个图像之间的动画变亮模糊效果
 #import "GPUImageDivideBlendFilter.h"               //通常用于创建两个图像之间的动画变暗模糊效果


 #pragma mark - 尚不清楚
 #import "GPUImageJFAVoroniFilter.h"
 #import "GPUImageVoroniConsumerFilter.h"
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