我使用Berkeley_sockets在Linux中有一台服务器,我与iPod客户端建立TCP连接。我有一个IplImage* img;
从服务器发送到iPod。我使用write(socket,/*DATA*/,43200);
命令,我尝试发送的数据是:reinterpret_cast<char*>(img)
,img
和img->imageData
。所有这些选择实际上都会发送任何类型的数据。
在iPod方面,我以这种方式接收数据(正如我在SO中看到的那样。不要介意复杂的东西,它只是用于从单个图像接收所有数据。):
bytesRead = [iStream read: (char*)[buffer mutableBytes] + totalBytesRead maxLength: 43200 - totalBytesRead];
收到整张图片后,我有了这个:
[buffer setLength: 43200];
NSData *imagem = [NSData dataWithBytes:buffer length:43200];
UIImage *final= [self UIImageFromIplImage:imagem];
现在..我知道我可以让openCV在iPod上工作,但是我找不到关于如何让它工作的简单解释,所以我使用the second code from this webpage并对其进行了调整,因为我知道所有我的图像的规格(例如我设置了CGImageCreate()
函数中的所有变量。):
- (UIImage *)UIImageFromIplImage:(NSData *)image {
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
// Allocating the buffer for CGImage
NSData *data = [NSData dataWithBytes:image length:43200];
CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)data);
// Creating CGImage from chunk of IplImage
size_t width = 240;
size_t height = 180;
size_t depth = 8; //bitsPerComponent
size_t depthXnChannels = 8; //bitsPerPixel
size_t widthStep = 240; //bytesPerRow
CGImageRef imageRef = CGImageCreate(width, height, depth, depthXnChannels, widthStep, colorSpace, kCGImageAlphaNone|kCGBitmapByteOrderDefault,provider, NULL, false, kCGRenderingIntentDefault);
// Getting UIImage from CGImage
UIImage *ret = [UIImage imageWithCGImage:imageRef];
lolView.image = ret;
CGImageRelease(imageRef);
CGDataProviderRelease(provider);
CGColorSpaceRelease(colorSpace);
return ret;
}
问题:当我显示图像时,即使发送的图像始终相同,我也会感到非常奇怪和“随机”。我真的不知道出了什么问题......
PS:TCP连接与其他数据(如数字或单词)一起正常工作。图像是灰度图像。
感谢您的帮助。
答案 0 :(得分:1)
我让它像这样工作。 在服务器端(linux中的code :: blocks with openframeworks(&amp; ofxOpenCv)):
img.allocate(240, 180, OF_IMAGE_COLOR); //ofImage
img2.allocate(240, 180); //ofxCvColorImage
frame = cvCreateImage(cvSize(240,180), IPL_DEPTH_8U, 3); //IplImage
bw = cvCreateImage(cvSize(240,180), IPL_DEPTH_8U, 1); //IplImage
gray.allocate(240, 180); //ofxCvGrayscaleImage
///ofImage
img.loadImage("lol.jpg");
///ofImage -> ofxCvColor
img2.setFromPixels(img.getPixels(), 240, 180);
///ofxCvColor -> IplImage
frame = img2.getCvImage();
///IplImage in GRAY
cvCvtColor(frame,bw,CV_RGB2GRAY);
cvThreshold(bw,bw,200,255,CV_THRESH_BINARY); //It is actually a binary image
gray = bw;
pix = gray.getPixels();
n=write(newsockfd,pix,43200);
在客户端(iPod 4.3):
-(UIImage *) dataFromIplImageToUIImage:(unsigned char *) rawData;
{
size_t width = 240;
size_t height = 180;
size_t depth = 8; //bitsPerComponent
size_t depthXnChannels = 8; //bitsPerPixel
size_t widthStep = 240; //bytesPerRow
CGContextRef ctx = CGBitmapContextCreate(rawData, width, height, depth, widthStep, CGColorSpaceCreateDeviceGray(), kCGImageAlphaNone);
CGImageRef imageRef = CGBitmapContextCreateImage (ctx);
UIImage* rawImage = [UIImage imageWithCGImage:imageRef];
CGContextRelease(ctx);
myImageView.image = rawImage;
return rawImage;
free(rawData);
}
可能有一种更简单的方法可以做到这一点,但是,嘿,完成工作。希望这对任何人都有帮助。