What is aliasing and antialiasing

What is aliasing and antialiasing? Briefly explain both the terms.

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In line drawing algorithms, all rasterzed positions do not match with the true line and encompass to symbolize a straight line. This problem is rigorous in low resolution screens. In these screens line looks like a stair-step. This effect is termed as aliasing.

The procedure of adjusting intensities of pixels all along the line to minimize the consequence of aliasing is termed as antialiasing.

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