How to extract the information from a specific line which draws on an image in matlab?

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Ali Hariri 2022-1-18

评论： Ali Hariri 2022-1-20

Dear all, I have a problem for my project. I have a bunch of matrixs M by N by Z.

I binerized all matrixs and find the boundaries for each M by N matrix and apply them on original image same as the attached images (Red lines).

I would like to extract the information from cells which assign to a specific line.

To do this, I draw a shrinked border in black color and I would like to extract the information of the cells that the black line overlab with them.

Here I mean the black line which shows in the third image.

Adam Danz 2022-1-18

编辑：Adam Danz 2022-1-18

...or do you want to get color information of the image within the black circle?

Ali Hariri 2022-1-19

Dear Max Heimann and Adam Danz

I need the color information of the pixels in my original image which has the same location as black line in the processes image.

imagine the (x,y) positions of the black line is my target which I need to know its color information from my original image.

Image Analyst 2022-1-19

If xBlack and yBlack are the vectors that you plotted for the black curve, you can get the values underneath the lines by doing this

for k = 1 : length(xBlack)
    v(k) = data(yBlack(k), xBlack(k));  % Note that y comes first because it's "row".
end

v will be a vector of data values at the black curve locations.

Anonymous 2022-1-20

No, it was a seperate question actually, I am sorry if that was an inappropriate way to ask here in this discussion.

Ali Hariri 2022-1-20

Dear @Image Analyst I found my mistake here, thank you for your support. Furthermore, I dont know Anonymous, as said it was a separate question.

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