I have calculated the distance between fixed object and moving object in a video. Using this distance I am trying to calculate the displacement of moving object in consecutive frame.

5 次查看（过去 30 天）
rohan gupta
rohan gupta 2014-11-20
编辑： rohan gupta 2014-11-21
I have tried doing it, but I am getting error.
if true
% code
end X(r)=thisCentroid(:,1);
Y(r)=thisCentroid(:,2);
if r>=2
dx=X(2)-X(1);
dy=Y(2)-Y(1);
dist_c(k)=hypot(dx,dy);
save dist_c dist_c;
for k=2:numberOfFrames
q(k)=imsubtract(dist_c(k),dist_c(k-1));
end
The error which I am getting while running the code is
  • Attempted to access dist_c(2); index out of bounds because numel(dist_c)=1 .
Error in Untitled2 (line 92)
*q(k)=imsubtract(dist_c(k),dist_c(k-1));*
*

请先登录，再回答此问题。

回答（1 个）

sandeep
sandeep 2014-11-20
Try using pdist() function to calculate the distance between two points and save it to an array. It is not clear in the code about k value from the loop. It looks your dist_c has only one value and you are trying access from the second value.
  1 个评论
rohan gupta
rohan gupta 2014-11-20
编辑：rohan gupta 2014-11-21
I tried using pdist(), its not working. I am still getting same error
When I comment the
q(k)=imsubtract(dist_c(k),dist_c(k-1));
I am able to get the distance between stationary object and moving object for all the frames. Now I am trying to find the displacement of the moving object with respect to stationary object by subtracting the obtained distance of previous frame & present frame. In my video there are in all 900 frames.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Tracking and Motion Estimation 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by