Is there anyway to interactively change the color of a data point in an imagesc plot?

2 次查看（过去 30 天）

Alex Weaver 2020-1-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501979-is-there-anyway-to-interactively-change-the-color-of-a-data-point-in-an-imagesc-plot

回答： Alex Weaver 2020-1-28

Say I had an imagesc plot and wanted to change one of the values from black to white. Is there anyway to do that in the plot itself, or is there any way to maybe use a GUI to allow the user to do that?

Here is the code for reference

nRows = 20;
nCols = 50;
Matrix = zeros(nRows,nCols);
Rndm = randi([0 1],size(Matrix));
imagesc(Rndm)
colormap(gca, gray)

4 个评论
显示 2更早的评论隐藏 2更早的评论

Walter Roberson 2020-1-25

Well, you could do it with techniques such as first converting your image to rgb using mat2gray() followed by im2uint8() followed by ind2rgb() . After that, you could use ginput() or similar to designate points you wanted to change the color of, and some kind of interface indicating the color you wanted to change to, and store the results in a matrix .

Alex Weaver 2020-1-25