convert matrix coordenates at cartesian coordenate

Question

Jesus Luevano 2012-8-27

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https://ww2.mathworks.cn/matlabcentral/answers/46816-convert-matrix-coordenates-at-cartesian-coordenate

Hello, when I use the function in matlab centroids, the latter gives me coordinates matrix, and when I want to represent objects in a plane, this is like the Cartesian coordinates, my question is how I can change the source for my flat matlab, or represent objects in a plane ij.

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Answer 1

Walter Roberson 2012-8-27

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https://ww2.mathworks.cn/matlabcentral/answers/46816-convert-matrix-coordenates-at-cartesian-coordenate#answer_57241

在 MATLAB Online 中打开

Ycoords = interp1( [1 size(YourMatrix,1)], [TopY BottomY], CentroidRowValues );
Xcoords = interp1( [1 size(YourMatrix,2)], [LeftX RightX], CentroidColumnValues );

Note: you need to be careful about whether the coordinates are considered to be at the edge of pixels or at the center of pixels.

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Walter Roberson 2012-8-27

TopY is the Y coordinate corresponding to the top of the matrix (lowest row index.) BottomY is the Y coordinate corresponding to the bottom of the matrix (greatest row index.) LeftX is the X coordinate corresponding to the left of the matrix (lowest column index.) RightX is the X coordinate corresponding to the right of the matrix (greatest column index).

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