Image Processing Toolbox

Image Cropping

To extract a rectangular portion of an image, use the imcrop function. imcrop accepts two primary arguments:

• The image to be cropped
• The coordinates of a rectangle that defines the crop area

If you call imcrop without specifying the crop rectangle, the cursor changes to a cross hair when it is over the image. Click on one corner of the region you want to select, and while holding down the mouse button, drag across the image. imcrop draws a rectangle around the area you are selecting. When you release the mouse button, imcrop creates a new image from the selected region.

In this example, you display an image and call imcrop. The rectangle you select is shown in red.

• imshow ic.tif
  I = imcrop;
  

The imcrop function waits for you to draw the cropping rectangle on the image.

Now call imshow to display the cropped image. If you call imcrop without specifying any output arguments, imcrop displays the image in a new figure.

• imshow(I)
  
  
  

Image Rotation

Performing General Spatial Transformations