centerCropWindow2d

Create rectangular center cropping window

Syntax

win = centerCropWindow2d(inputSize,targetSize)

Description

win = centerCropWindow2d(inputSize,targetSize) determines the window to crop from a 2-D input image of size inputSize such that the size of the cropped image is targetSize. The coordinates of the window are centered in the input image.

Examples

Center Crop Image To Target Size

Read and display an image.

chips = imread('coloredChips.png');
imshow(chips)

Specify the target size of the cropping window.

targetSize = [256 256];

Create a center crop window.

win1 = centerCropWindow2d(size(chips),targetSize);

Crop the original image using the center crop window.

B1 = imcrop(chips,win1);

Display the cropped image.

imshow(B1)

Read and display a second image of a different size.

kobi = imread('kobi.png');
imshow(kobi)

Try applying the center crop window to this image. The cropped region does not come from the center of the image because the center crop window uses the spatial extents of the chips image.

B2 = imcrop(kobi,win1);
imshow(B2)

To crop the kobi image from the center, specify a new center crop window.

win2 = centerCropWindow2d(size(kobi),targetSize);
B3 = imcrop(kobi,win2);
imshow(B3)

Input Arguments

inputSize — Input image size

2-element vector of positive integers | 3-element vector of positive integers

Input image size, specified as one of the following.

Type of Input Image	Format of inputSize
2-D grayscale or binary image	2-element vector of positive integers of the form [height width]
2-D RGB or multispectral image of size	3-element vector of positive integers of the form [height width channels]

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

targetSize — Target image size

2-element vector of positive integers | 3-element vector of positive integers

Target image size, specified as one of the following.

Type of Target Image	Format of targetSize
2-D grayscale or binary image	2-element vector of positive integers of the form [height width]
2-D RGB or multispectral image of size	3-element vector of positive integers of the form [height width channels]

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Output Arguments

win — Cropping window

Rectangle object

Cropping window, returned as a Rectangle object.

Version History

Introduced in R2019b