php直播源码，iOS 图片去背景相关的代码
-(UIImage*)removeBackgroudWithImage:(UIImage*)image{
unsignedchar*targetData=malloc(sizeof(unsignedchar)*image.size.width*image.size.height*4);
UIGraphicsBeginImageContext(image.size);
[imagedrawInRect:CGRectMake(0,0,image.size.width,image.size.height)];
unsignedchar*data=malloc(sizeof(unsignedchar)*image.size.width*image.size.height*4);
[selfimageRGBABytesRef:&dataFromImage:image];
for(inti=0;i
UIColor*pixleColor=[UIColorcolorWithRed:data[i]/255.0green:data[i+1]/255.0blue:data[i+2]/255.0alpha:data[i+3]/255.0];
CGFloatc,m,y,k,a;
[pixleColorgetCyan:&cmagenta:&myellow:&yblack:&kalpha:&a];//YYKit中的类别方法
targetData[i]=data[i];
targetData[i+1]=data[i+1];
targetData[i+2]=data[i+2];
if(k
targetData[i+3]=0;
}else{
targetData[i+3]=255;
}
}
UIImage*result=[selfimageFromBRGABytes:targetDataimageSize:image.size];
free(targetData);
returnresult;
}
-(UIImage*)imageFromBRGABytes:(unsignedchar*)imageBytesimageSize:(CGSize)imageSize{
CGImageRefimageRef=[selfimageRefFromBGRABytes:imageBytesimageSize:imageSize];
UIImage*image=[UIImageimageWithCGImage:imageRef];
CGImageRelease(imageRef);
returnimage;
}
-(CGImageRef)imageRefFromBGRABytes:(unsignedchar*)imageBytesimageSize:(CGSize)imageSize{
CGColorSpaceRefcolorSpace=CGColorSpaceCreateDeviceRGB();
CGContextRefcontext=CGBitmapContextCreate(imageBytes,
imageSize.width,
imageSize.height,
8,
imageSize.width*4,
colorSpace,
kCGImageAlphaPremultipliedLast);
CGImageRefimageRef=CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
returnimageRef;
}
-(void)imageRGBABytesRef:(unsignedchar**)dataFromImage:(UIImage*)image{
unsignedchar*targetData=malloc(sizeof(unsignedchar)*image.size.width*image.size.height*4);
CGColorSpaceRefcolorSpace=CGColorSpaceCreateDeviceRGB();
CGContextRefcontext=CGBitmapContextCreate(targetData,
image.size.width,
image.size.height,
8,
image.size.width*4,
colorSpace,
kCGImageAlphaPremultipliedLast);
CGContextDrawImage(context,CGRectMake(0,0,image.size.width,image.size.height),image.CGImage);
memcpy(*data,targetData,sizeof(unsignedchar)*image.size.width*image.size.height*4);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
}
以上就是
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