CODEWITHSUNDEEP
matlabuser-interfacematlab-guideaxescontrast
Vikrant Karale
Vikrant Karale

Reputation: 147

How to read the image data from particular axes of MATLAB GUI?

I have designed one MATLAB GUI in which there are two axes for displaying images. I am using 'imcontrast' function to adjust brightness/contrast of the images on first axes. Now, I want to store this enhanced output(brightness/contrast adjusted output) in some variable. As 'imcontrast' function does not returns the output image, so how can i get output image? or Is there any way to read image data from particular axes? I have tried with 'getimage' function but it returns the first image data contained in the Handle Graphics object (i.e previously displayed input image) and not latest brightness/contrast adjusted Image. Please help me out in saving the brightness/contrast adjusted Image given by 'imcontrast' function.

Upvotes: 1

Views: 2284

Answers (1)

Divakar
Divakar

Reputation: 221514

Use this -

imcontrast(gca) %// Perform imcontrast
waitfor(gcf); %// Wait for figure data to be updated with imcontrast
image_data = getimage(gcf);%// Store image data as image_data variable

How to use within a GUI

Just to showcase on how to use it, you can create a pushbutton with MATLAB-Guide and in it's callback function use this -

%// Show the image on an existing image axes of the GUI.
imshow('pout.tif') %// This image is available in MATLAB image library.

imc_figure = imcontrast(gca) %// Perform imcontrast
waitfor(imc_figure); %// Wait for the data to be updated in the current figure
image_data = getimage(gcf);%// image data stored into image_data variable

%// Open image_data on a separate figure window for verification.
%// Make sure this is the updated image.
figure,imshow(image_data)

How to use as a standalone code

Im = imread('cameraman.tif');%// This image is available in MATLAB image library.
h1 = imshow(Im)
h2 = imcontrast(gca); %// Perform imcontrast 
waitfor(h2); %// Wait for figure data to be updated with imcontrast 
image_data = getimage(gcf);%// Store modified image data

%// Show modified image data for verification
figure,imshow(image_data)

Upvotes: 1

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