How to extract pixel position from Image in app designer ?

Question

karan padariya 2022-6-28

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https://ww2.mathworks.cn/matlabcentral/answers/1749580-how-to-extract-pixel-position-from-image-in-app-designer

回答： Siraj 2023-9-7

Basically , I am devleping an matlab app using matlab app designer.In that I want to exterct pixel position for ferther operation.

I have tried impoint and ginput but proble with that is they are opening grap in new window, I want to select pixel from the same app window.

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Aman Banthia 2022-6-29

Please refer to the following link, you may find your answer there:

https://in.mathworks.com/matlabcentral/answers/554002-how-to-get-pixel-s-position-of-an-image-in-uiaxis-in-appdesigner

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Answer 1

Siraj 2023-9-7

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https://ww2.mathworks.cn/matlabcentral/answers/1749580-how-to-extract-pixel-position-from-image-in-app-designer#answer_1304236

在 MATLAB Online 中打开

Hi! It is my understanding that you have an image displayed in the app designer and would like to obtain the coordinates of the pixel that the mouse pointer is currently hovering over.

To extract the coordinates of the pixel under the mouse pointer in an image displayed in the app designer, you can utilize the "datacursormode" function. This function enables interactive data exploration by creating and editing data tips, which are small text boxes displaying information about specific data points. To better understand the implementation, refer to the provided code example below:

% Button pushed function: TrackanImageButton 
function TrackanImageButtonPushed(app, event) 
img = imread("TestImage.jpeg"); 
img = rgb2gray(img); 
dcm = datacursormode(ancestor(app.UIAxes, 'figure'));  
dcm.Enable = 'on';  
imshow(img, 'Parent',app.UIAxes) 
end 