Question

A digital camera processes the images images in the real-world and stores them in binary form. Using the principles of digital signal processing, practically explain how this phenomenon occurs

Answer 1

For any real world object, when light falls on it, the light reflects back from the object. Light then passes through the eye lens on a specific angle. Image is then formed on the retina and is inverted.

For digital cameras, a CCD sensor array is used to form an image. CCD or charge coupled device senses the pixel values and creates an electric signal out of it. The array is more like a censor matrix and senses the photon's intensity.

As the light falls on an item, it is reflected back and enters the camera. The light photons strike the sensor chip and a small charge is created in the sensor. Number of sensors together form the actual image. Total number of photons are stored due to charge created by array and converted to voltage. Voltage is then transformed into digital data and saved.