Brightness in image

1. What is brightness in an image?
2. What is brightness in digital imaging?
3. What is the difference between brightness and contrast of an image?

What is brightness in an image?

Image brightness (or luminous brightness) is a measure of intensity after the image has been acquired with a digital camera or digitized by an analog-to-digital converter.

What is brightness in digital imaging?

Instead, in terms of digital image processing, brightness is more properly described as the measured intensity of all the pixels comprising an ensemble that constitutes the digital image after it has been captured, digitized, and displayed.

What is the difference between brightness and contrast of an image?

Brightness increases the overall lightness of the image—for example, making dark colors lighter and light colors whiter—while contrast adjusts the difference between the darkest and lightest colors. Below is an example of adjustments made to the brightness and contrast of an image.