C++ (Cpp) DImage::desaturate Examples

Example #1

File: OpticalFlow.cpp Project: mgharbi/video_var

//---------------------------------------------------------------------------------------
// function to convert image to feature image
//---------------------------------------------------------------------------------------
void OpticalFlow::im2feature(DImage &imfeature, const DImage &im)
{
	int width=im.width();
	int height=im.height();
	int nchannels=im.nchannels();
	if(nchannels==1)
	{
		imfeature.allocate(im.width(),im.height(),3);
		DImage imdx,imdy;
		im.dx(imdx,true);
		im.dy(imdy,true);
		_FlowPrecision* data=imfeature.data();
		for(int i=0;i<height;i++)
			for(int j=0;j<width;j++)
			{
				int offset=i*width+j;
				data[offset*3]=im.data()[offset];
				data[offset*3+1]=imdx.data()[offset];
				data[offset*3+2]=imdy.data()[offset];
			}
	}
	else if(nchannels==3)
	{
		DImage grayImage;
		im.desaturate(grayImage);

		imfeature.allocate(im.width(),im.height(),5);
		DImage imdx,imdy;
		grayImage.dx(imdx,true);
		grayImage.dy(imdy,true);
		_FlowPrecision* data=imfeature.data();
		for(int i=0;i<height;i++)
			for(int j=0;j<width;j++)
			{
				int offset=i*width+j;
				data[offset*5]=grayImage.data()[offset];
				data[offset*5+1]=imdx.data()[offset];
				data[offset*5+2]=imdy.data()[offset];
				data[offset*5+3]=im.data()[offset*3+1]-im.data()[offset*3];
				data[offset*5+4]=im.data()[offset*3+1]-im.data()[offset*3+2];
			}
	}
	else
		imfeature.copyData(im);
}