ios - How to send IplImage from server to iPod client UIImage via TCP -

i have server in linux using berkeley_sockets , create tcp connection ipod client. have iplimage* img; send server ipod. use write(socket,/*data*/,43200); command , data tried send is: reinterpret_cast<char*>(img), img , img->imagedata. of choices send kind of data.

on ipod side receive data way (as i've seen here in so. don't mind complicated stuff, it's receiving data single image.):

bytesread = [istream read: (char*)[buffer mutablebytes] + totalbytesread maxlength: 43200 - totalbytesread]; 

after receiving whole image, have this:

[buffer setlength: 43200]; nsdata *imagem = [nsdata datawithbytes:buffer length:43200]; uiimage *final= [self uiimagefromiplimage:imagem]; 

now.. know have opencv working on ipod, can't find simple explanation on how work, used the second code webpage , adapted it, since know specifications of image (for instance set variables cgimagecreate() function.):

- (uiimage *)uiimagefromiplimage:(nsdata *)image {  cgcolorspaceref colorspace = cgcolorspacecreatedevicegray();  // allocating buffer cgimage nsdata *data = [nsdata datawithbytes:image length:43200];  cgdataproviderref provider = cgdataprovidercreatewithcfdata((cfdataref)data);  // creating cgimage 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 cgimage uiimage *ret = [uiimage imagewithcgimage:imageref]; lolview.image = ret; cgimagerelease(imageref); cgdataproviderrelease(provider); cgcolorspacerelease(colorspace); return ret; 

}

the problem: when display image, weird , ´random´, though image sent same. have no idea what's wrong..

ps: tcp connection working fine other data, numbers or words. , image grayscale.

thanks help.

i got working this. on server side (code::blocks in linux openframeworks (& 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 binary image gray = bw; pix = gray.getpixels();  n=write(newsockfd,pix,43200); 

on client side (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); } 

probably there's easier way this, hey, gets work done. hope helps anyone.