Which technique increases or decreases the number of pixels in a digital image? a. pixel depth b. pixel dimension c. interpolation d. resolution

Answer:  

Interpolation is the technique that increases or decreases the number of pixels in a digital image.

Explanation:

Interpolation comes when you resize image from one picture element to another picture element. Image resizing is needed when we want to maximize or minimize total number of picture elements.

Interpolation works by using the known points to guess the values at unknown points. Image interpolation works in two directions, and tries to achieve a best approximation of a pixel's intensity depending on the values at surrounding pixels.  Interpolation designs are divided into two types:  

Adaptive design and non-adaptive design.