randomCropWindow2d

(Not recommended) Create randomized rectangular cropping window

randomCropWindow2d is not recommended. Use randomWindow2d instead. For more information, see Version History.

Syntax

win = randomCropWindow2d(inputSize,targetSize)

Description

win = randomCropWindow2d(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 selected from a random position in the input image.

Examples

Randomly Crop Image to Target Size

Read and display an image.

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

Specify the target size of the cropping window.

targetSize = [1000 1000];

Create three random crop windows. Each window has a different position from the input image.

win1 = randomCropWindow2d(size(A),targetSize);
win2 = randomCropWindow2d(size(A),targetSize);
win3 = randomCropWindow2d(size(A),targetSize);

Crop the original image using each of the random crop windows.

B1 = imcrop(A,win1);
B2 = imcrop(A,win2);
B3 = imcrop(A,win3);

Display the three cropped images as a montage.

montage({B1,B2,B3},'Size',[1 3]);

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

R2021a: randomCropWindow2d is not recommended

randomCropWindow2d is limited to selecting regions of fixed size. In R2021a, the randomWindow2d function was introduced. This function enables randomizing the size and shape of the cropped region.

To update your code, change instances of the function name randomCropWindow2d to randomWindow2d. You do not need to change the input arguments.

There are no plans to remove randomCropWindow2d at this time.