OpticalFlow workflow?

Lukita · December 16, 2022, 2:48am

Hi,
I’m new to OpenMV and currently testing optical flow on the H7.
I have a question: Does it work based on the opencv or it is a your own code of the optical flow, if so, where can I read the source code of how things work, cause I can’t find functions such as “find_displacement” anywhere on the Github page.
Thank you

kwagyeman · December 16, 2022, 9:38pm

github.com

openmv/openmv/blob/master/src/omv/imlib/phasecorrelation.c#L246


      
              memset(img->data, 0, size);
          
          
    imlib_logpolar_int(img, &img_2, &rect, linear, reverse);
          
          
    fb_free();
          }
          #endif //defined(IMLIB_ENABLE_LOGPOLAR) || defined(IMLIB_ENABLE_LINPOLAR)
          
          
#ifdef IMLIB_ENABLE_FIND_DISPLACEMENT
          // Note that both ROI widths and heights must be equal.
          void imlib_phasecorrelate(image_t *img0, image_t *img1, rectangle_t *roi0, rectangle_t *roi1, bool logpolar, bool fix_rotation_scale,
                                    float *x_translation, float *y_translation, float *rotation, float *scale, float *response)
          {
              // Step 1 - Get Rotation/Scale Differences
              if ((!logpolar) && fix_rotation_scale) {
                  fft2d_controller_t fft0, fft1;
          
          
        fft2d_alloc(&fft0, img0, roi0);
                  fft2d_alloc(&fft1, img1, roi1);
          
          
        fft2d_run(&fft0);

kwagyeman · March 3, 2023, 7:43pm

Hi, you need to understand that code yourself. If you are new to C then you are diving into the deep end here.

(Also, I haven’t touched that method in years so I don’t know anymore. Don’t have time to look right now).