Digital image processing involves using computer algorithms to analyze and manipulate digital images. It includes techniques for image acquisition like capturing with cameras and scanning, then converting analog images to digital. Methods are described for enhancing images through color correction, noise reduction, and sharpening. Image restoration can filter blurred images and undo degradation from motion blur. Algorithms are presented for lossless and lossy image compression to reduce file sizes. Segmentation divides images into regions while feature extraction identifies edges, corners and blobs. Deep learning and pattern recognition can recognize and classify objects. Applications discussed are in medical imaging, robotics, and remote sensing.