Image Acquisition in Digital Image Processing
Image Acquisition is the first step in any image processing system.
The general aim of any image acquisition is to transform an optical image (real-world data) into an array of numerical data which could be later manipulated on a computer.
Image acquisition is achieved by suitable cameras. We use different cameras for different applications.
If we need an X-ray image, we use a camera (film) that is sensitive to X-rays. If we want an infrared image, we use cameras that are sensitive to infrared radiation.
For normal images (family pictures, etc.), we use cameras that are sensitive to the visual spectrum.