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Why does my image does not conert to grayscale?

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Andrew Killian
Andrew Killian 2021-8-31
评论： Image Analyst 2021-9-5
I need to convert an image that we were given to grayscale.
I wrote the code below. When I highlight the whole 'imagesc' line and 'evaluate selction' the image pops up but in color.
logo = imread('..._logo.jpg');
figure;
imagesc(logo);
colormap gray;

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Image Analyst
Image Analyst 2021-8-31
Use imshow() because imagesc() applies some funky colormap by default, and that is usually not what you want.
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Image Analyst
Image Analyst 2021-8-31
No, you don't need that last line. The default for gray scale images is to not use a colormap and show everything in it's original, native gray color.
Image Analyst
Image Analyst 2021-9-5
Andrew, if this solved it, can you click the "Accept this answer" link? Thanks in advance.

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