How to change pixels to a different colour with a greyscale image?

2 次查看（过去 30 天）
Anon
Anon 2020-2-3
回答： Tom Holz 2020-2-3
Hi everyone,
I want to change all the pixels with the intensity less than 8000 to the colour red. However, I am struggling with this as the image is greyscale and not sure how to change this. As I want to clearly differentiate the metal clip from the tissue and to make sure that no pixels of the tissue are being identified with the metal clip. The metal clip in the image uploaded can be seen as the thick black line within the tube connected to the tissue.

请先登录，再回答此问题。

采纳的回答

Tom Holz
Tom Holz 2020-2-3
Here's a hacky approach that does the job:
I = imread('CTimagem.png');
mask = I < 8000;
Ired = I;
Igreen = I;
Iblue = I;
Ired(mask) = max(I, [], 'all');
Igreen(mask) = 0;
Iblue(mask) = 0;
img = cat(3, Ired, Igreen, Iblue);
figure
imagesc(img)

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Read, Write, and Modify Image 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by