How to draw a line on a image (result of data plotting) and get the data crossed by the line? like a cross section.

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Fercho_Sala 2021-2-8

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评论： Fercho_Sala 2021-2-12

Hello, I know there is a fuction called 'imgprofile' that works for Pixel-value cross-sections along line segments, but this is onli for images (.jpg o .png) . My idea is to do that cross section on an image from a data set. How do you do it?, Thanks.

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Answer 1

Shiva Kalyan Diwakaruni 2021-2-11

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Hi,

if you want to do cross section on images from dataset . You can try writting a for loop in below manner.

OutputFolder = 'C:\Temp'; % Set as needed [EDITED]

dinfo = dir('*.jpg');% image extension can be changed or you can write another outer loop for the list of extensions available in your dataset.

for K = 1 : length(dinfo)

thisimage = dinfo(K).name;

Img = imread(thisimage);

Y = imshow(Img);

improfile(I,x,y),grid on; %x,y can be defined

end

You can also try using imageSet function which returns an object for storing an image data set or a collection of image data sets.

follow the below link for more information on imageset.

https://www.mathworks.com/help/vision/ref/imageset-class.html

hope it helps,

thanks.

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Fercho_Sala 2021-2-12

ok Shiva thanks for the answer, the function 'improfile' works good if your are working on the image a '.jpg .bmp' etc extentions, as a result it gives you the number of pixels your profile is crossing, but in my case I want to work directly with the data set, and cross the profile like a graphic view.

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