What do you mean by adjusting brightness and contrast of an image?
What is the use of RGB?
Give the answer in simple words so that a 7th class student can understand it.
Answers
Answer:
Brightness ; Brightness is an attribute of visual perceptionin which a source appears to be radiating or reflecting light.
Contrast; Contrast is the difference in luminance or colour that makes an object (or its representation in an image or display) distinguishable. In visual perception of the real world, contrast is determined by the difference in the color and brightness of the object and other objects within the same field of view. The human visual system is more sensitive to contrast than absolute luminance; we can perceive the world similarly regardless of the huge changes in illumination over the day or from place to place. The maximum contrast of an image is the contrast ratio or dynamic range.
Use of R.G.B.
The main purpose of the RGB color model is for the sensing, representation, and display of images in electronic systems, such as televisions and computers, though it has also been used in conventional photography. Before the electronic age, the RGB color model already had a solid theory behind it, based in human perception of colors.
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