topic Hi. in Intel® Integrated Performance Primitives

Convert IplImage to CIppImage

Changbu_Jeong — Fri, 16 May 2014 07:04:16 GMT

Hi~

I currently use the UIC sample code.

I want to convert IplImage to CIppImage. and to save *.jpg using the CIppImage type.

So, i try to convert, but i can't save to *.jpg.

For example, My sample code is

/////////////////////////////////////////////////////////////////////////////////////////////

CIppImage image;
IM_TYPE fmtIn;
IM_TYPE fmtOut;

Ipp8u* buf;

CStdFileOutput fo;
CMemBuffOutput mo;

fmtOut = IT_BMP;
fo.Open(cmdOptions.dst);

IplImage *img = cvLoadImage(cmdOptions.src,CV_LOAD_IMAGE_GRAYSCALE);
// cvShowImage("test",cmdOptions.src);

//   cvSaveImage(cmdOptions.dst,img);

   image.Width(img->width);
   image.Height(img->height);
   image.Color(IC_GRAY);
   image.Format(IF_FIXED);
   image.Sampling(IS_444);
   image.ComponentOrder(0);
   image.NChannels(img->nChannels);
   image.Precision(img->depth);
   image.Step(4096);
   image.DataPtr((Ipp8u*)img->imageData);

   // Encoder
   BaseStream::TPosition pos = 0;
   size = image.Step()*image.Height()*2;
   buf = (Ipp8u*)ippMalloc((int)size);
   mo.Open(buf, (int)size);
   res = EncodeImage(image, mo, cmdOptions, fmtOut, &encTime);
   mo.Position(pos);
   mo.Close();
   fo.Write(buf, pos, cnt);
   ippFree(buf);

///////////////////////////////////////////////////////////////////////////////////////////////////////

Thanks in advance for your help!

Hi,

Sergey_K_Intel — Fri, 16 May 2014 14:39:27 GMT

Hi,

I am preparing a test workspace for this. Meanwhile could you explain what is "can't save to *jpg"? The output file is broken? Any exception?

Hi.

Changbu_Jeong — Mon, 19 May 2014 00:50:00 GMT

Hi. Sergey Khlystov

Thank you for your response.

I currently try to convert bmp image type to jpg image type using the IplImage and CIppImage.

So, first, loading xxx.bmp image using the "cvLoadImage".

Second, converting IplImage to CIppImage.

Finally, saving xxx.jpg image using the "CIppImage"

But, it don't make the xxx.jpg file. Clicking the Image file, i can see the message "The file is empty, you can not display this photo"

I think it is a image type converting issue.

Thanks in advance your help.

I propose do that using the

Sergey_K_Intel — Mon, 19 May 2014 09:26:30 GMT

I propose do that using the following code:

/////////////////////////////////////////////////////////////////////////////////////////////

	fmtOut = IT_JPEG;
	fo.Open(cmdOptions.dst);
	IplImage *img = cvLoadImage(cmdOptions.src,CV_LOAD_IMAGE_GRAYSCALE);

	image.Attach(img->width, img->height, img->nChannels, img->depth, img->imageData, img->widthStep);
	image.Color(IC_GRAY);

    // Encoder
	BaseStream::TPosition pos = 0;  
	size = image.Step()*image.Height()*2;
	buf = (Ipp8u*)ippMalloc((int)size);
	mo.Open(buf, (int)size);
	res = EncodeImage(image, mo, cmdOptions, fmtOut, &encTime);
	mo.Position(pos);    

    mo.Close();
	fo.Write(buf, pos, cnt);

ippFree(buf);

///////////////////////////////////////////////////////////////////////////////////////////////////////

Should work.