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How to highlight a area in figure
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I want to hightlight the defect in croppedImage.mat by convHull.mat.
It's better set transparent.
the size of two figures is same.
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prabhat kumar sharma
2025년 1월 22일
이동: Mathieu NOE
2025년 1월 22일
To highlight an area in a figure and make it transparent, you can use the alpha data property in MATLAB. Here's a step-by-step guide to achieve this:
- Load your data: First, load your croppedImage and convHull data.
- Create a mask: Use the convHull to create a mask that identifies the region you want to highlight.
- Display the image with transparency: Use the imshow function with the 'AlphaData' property to make the highlighted area transparent.
Here's an example code snippet:
% Load the data
load('croppedImage.mat'); % Assuming this loads a variable named croppedImage
load('convHull.mat'); % Assuming this loads a variable named convHull
% Display the original image
imshow(croppedImage);
hold on;
% Create a mask for the highlighted area
highlightMask = false(size(croppedImage));
highlightMask(convHull) = true;
% Overlay the highlighted area with transparency
h = imshow(croppedImage);
set(h, 'AlphaData', ~highlightMask); % Set the non-highlighted part to transparent
% Optional: Add a color to the highlighted area
highlightedArea = imshow(cat(3, ones(size(croppedImage)), zeros(size(croppedImage)), zeros(size(croppedImage))));
set(highlightedArea, 'AlphaData', highlightMask * 0.5); % Adjust transparency level
추가 답변 (2개)
Image Analyst
2025년 1월 23일
You can try imoverlay to make the mask overlaid on the image, or you can use plot to plot a red outline at the mask perimeter location in the image.
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