c++ - Draw Histogram of depth image? -


i working depth image kinect. want calculate histogram of depth image, a/f:

     mat depth; //(take kinect sdk)     int histsize = 64;   // set ranges ( b,g,r) )    float range[] = { 0, 256 } ;     const float* histrange = { range };      bool uniform = true; bool accumulate = false;      mat depth_hist;     // compute histograms:    calchist( &depth, 1, 0, mat(), depth_hist, 1, &histsize, &histrange, uniform, accumulate );   // draw histograms depth     int hist_w = 320; int hist_h = 240;     int bin_w = cvround( (double) hist_w/histsize );     mat histimage( hist_h, hist_w, cv_8uc1, 1 );     // normalize result [ 0, histimage.rows ]      normalize(depth_hist, depth_hist, 0, histimage.rows, norm_minmax, -1, mat() );       // draw each channel   for( int = 1; < histsize; i++ )           {   line( histimage, point( bin_w*(i-1), hist_h - cvround(depth_hist.at<float>(i-1)) ) ,                    point( bin_w*(i), hist_h - cvround(depth_hist.at<float>(i)) ),                    scalar( 255), 2, 8, 0  );   }   // display  namedwindow("calchist demo", window_autosize );  imshow("calchist demo", histimage );

but, not working :(. take code grayscale image, works fine. don't know

what error?

thanks!

depth has range bigger 0-256 (you should assume 0-10000), maybe reason failure...


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