#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 "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
// 这些是不同滤镜的头文件
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
// 摄像头方向
_position = AVCaptureDevicePositionBack;
_mCamera = [[GPUImageStillCamera alloc]initWithSessionPreset:AVCaptureSessionPreset640x480 cameraPosition:_position];
// 竖屏方向
_mCamera.outputImageOrientation = UIInterfaceOrientationPortrait;
_mCamera.horizontallyMirrorRearFacingCamera = NO;
_mCamera.horizontallyMirrorFrontFacingCamera = YES;
// 滤镜
_mFilter = [[GPUImageVignetteFilter alloc]init];
// 创建GPIImage及尺寸
_mGPUImageView = [[GPUImageView alloc]initWithFrame:self.view.bounds];
//添加滤镜到相机上
[_mCamera addTarget:_mFilter];
[_mFilter addTarget:_mGPUImageView];
//添加视图到view上
[self.view addSubview:_mGPUImageView];
// 启动相机
[_mCamera startCameraCapture];
// 将按键视图放置顶层
[self.view bringSubviewToFront:buttonEffect];
self.btnBgView.hidden = YES;
self.btnBgView.frame =CGRectMake(375, 667 - 250, 375 - 80, 80);
[self creatSetectBtn];
[self createBtn];
[self buttonEffect];
_tempBtn = nil;
}
// 添加一个按钮触发拍照
-(void)createBtn
{
UIButton *btn =[UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake((375 - 80) * 0.5, 667 - 100, 80, 80);
[btn setTitle:@"拍照" forState:0];
[btn addTarget:self action:@selector(takePhoto:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
UIButton *button =[UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0, 667 - 100, 80, 80);
[button setTitle:@"切换摄像头" forState:0];
[button addTarget:self action:@selector(button:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
}
- (void)button:(UIButton *)sender
{
[_mCamera rotateCamera];
}
- (void)takePhoto:(UIButton *)sender
{
[_mCamera capturePhotoAsJPEGProcessedUpToFilter:_mFilter withCompletionHandler:^(NSData *processedJPEG, NSError *error) {
// 将相片保存到手机相册
ALAssetsLibrary *library = [[ALAssetsLibrary alloc]init];
[library writeImageDataToSavedPhotosAlbum:processedJPEG metadata:_mCamera.currentCaptureMetadata completionBlock:^(NSURL *assetURL, NSError *error) {
if (error) {
NSLog(@"保存失败");
}else{
NSLog(@"保存成功");
}
}];
}];
}
//设置btnBgView的位置 设置其为隐藏状态
- (void)resumeState
{
[UIView animateWithDuration:1.0 animations:^{
self.btnBgView.transform = CGAffineTransformMakeTranslation(375, 0);
}];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
self.btnBgView.hidden = YES;
});
}
// 创建滤镜按钮,这里的滤镜按钮是总按钮 弹出多个滤镜选项的按钮
- (void)buttonEffect
{
buttonEffect =[UIButton buttonWithType:UIButtonTypeCustom];
buttonEffect.frame = CGRectMake(375 - 80, 667 - 250, 80, 80);
[buttonEffect addTarget:self action:@selector(effectAction:) forControlEvents:UIControlEventTouchUpInside];
[buttonEffect setTitle:@"滤镜" forState:0];
[self.view addSubview:buttonEffect];
}
- (void)effectAction:(UIButton *)sender
{
if (self.btnBgView.hidden) {
[UIView animateWithDuration:1 animations:^{
self.btnBgView.transform = CGAffineTransformMakeTranslation(-375, 0);
}];
self.btnBgView.hidden = NO;
}else{
[self resumeState];
}
}
// 设置button 不设置颜色 放在btnBgView上
- (UIButton *)addSetBtn:(NSString *)btnTitle withBtnTAg:(NSInteger)btnTAg withBtnX:(CGFloat)btnX
{
UIButton *btn =[UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(btnX, 0, (self.btnBgView.frame.size.width - 8) / 5, 80);
btn.tag = btnTAg;
[btn addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
[btn setTitle:btnTitle forState:0];
[self.btnBgView addSubview:btn];
return btn;
}
- (void)creatSetectBtn
{
for (int i= 0; i<5; i++) {
CGFloat x = (self.btnBgView.frame.size.width -8) / 5 * i + 2 * i;
[self addSetBtn:[NSString stringWithFormat:@"效果%d",i+ 1] withBtnTAg:i withBtnX:x];
}
}
//滤镜切换
- (void)changeEffct:(GPUImageFilter *)mFilter withBtn:(UIButton *)btn
{
[_mCamera removeTarget:_mFilter];
_mFilter = mFilter; // 添加滤镜到相机上
[_mCamera addTarget:_mFilter];
[_mFilter addTarget:_mGPUImageView];
//调用收缩滤镜方法的方法
[self resumeState];
}
// 切换的方法
- (void)btnAction:(UIButton *)btn
{
// 这里可以把上方的头文件滤镜更换下来
switch (btn.tag) {
case (0):{
GPUImageToonFilter *mfilter = [[GPUImageToonFilter alloc]init];
[self changeEffct:mfilter withBtn:btn];
}
break;
case (1):{
GPUImageSketchFilter *mfilter = [[GPUImageSketchFilter alloc]init];
[self changeEffct:mfilter withBtn:btn];
}
break;
case (2):{
GPUImageStretchDistortionFilter *mfilter = [[GPUImageStretchDistortionFilter alloc]init];
[self changeEffct:mfilter withBtn:btn];
}
break;
case (3):{
GPUImageSepiaFilter *mfilter = [[GPUImageSepiaFilter alloc]init];
[self changeEffct:mfilter withBtn:btn];
}
break;
case (4):{
GPUImageSobelEdgeDetectionFilter *mfilter = [[GPUImageSobelEdgeDetectionFilter alloc]init];
[self changeEffct:mfilter withBtn:btn];
}
break;
default:
break;
}
}
主要感谢http://www.jianshu.com/p/e310e5dd9317
给的入门参考,初识GPUImage的强大,本篇也只是入门级别的简单的用法,仅供参考!生命不息,代码不止