is to reduce the redundancy of the image and to store or transmit data in an efficient form.image croppingimage resizingimage compression

It seems like you're asking about image processing techniques such as cropping, resizing, and compression. Here's a brief explanation of each:

1. Image Cropping: This is the process of removing unwanted outer areas from an image. This can be done to remove distractions from the image, to emphasize the subject, to change the aspect ratio, or to improve the overall composition.

2. Image Resizing: This is the process of changing the dimensions of an image, either to enlarge it or to reduce it. This can be done to fit the image into a certain space, to reduce the file size, or to create thumbnails.

3. Image Compression: This is the process of reducing the file size of an image without degrading the quality of the image below an acceptable level. This can be done to save storage space or to reduce the time required to transmit the image over the network.

These techniques are often used together in various combinations to prepare images for different uses.