This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

Crop an Image


You can also crop an image interactively using the Image Tool — see Crop Image Using Image Viewer App.

To extract a rectangular portion of an image, use the imcrop function. Using imcrop, you can specify the crop region interactively using the mouse or programmatically by specifying the size and position of the crop region.

This example illustrates an interactive syntax. The example reads an image into the MATLAB® workspace and calls imcrop specifying the image as an argument. imcrop displays the image in a figure window and waits for you to draw the crop rectangle on the image. When you move the pointer over the image, the shape of the pointer changes to cross hairs . Click and drag the pointer to specify the size and position of the crop rectangle. You can move and adjust the size of the crop rectangle using the mouse. When you are satisfied with the crop rectangle, double-click to perform the crop operation, or right-click inside the crop rectangle and select Crop Image from the context menu. imcrop returns the cropped image in J.

I = imread('circuit.tif')
J = imcrop(I);

You can also specify the size and position of the crop rectangle as parameters when you call imcrop. Specify the crop rectangle as a four-element position vector, [xmin ymin width height].

In this example, you call imcrop specifying the image to crop, I, and the crop rectangle. imcrop returns the cropped image in J.

I = imread('circuit.tif');
J = imcrop(I,[60 40 100 90]);
Was this topic helpful?