The process of assigning a value to each pixel to represent a gray tone is called:

The process of assigning a value to each pixel to represent a gray tone is called:

• A. Quantization
• B. Scintillating
• C. Nyquist Frequency
• D. Sampling

Answer: (A)

Quantization is the process of assigning a value to each pixel to represent a gray tone. In digital imaging, after sampling the image, the continuous brightness values are mapped to a finite set of discrete gray levels defined by the bit depth (for example, 8-bit depth yields 256 possible levels). This mapping creates the final gray-scale representation and can introduce small errors when original tones fall between representable levels. The other terms describe related but different ideas: sampling is about capturing brightness at discrete locations; Nyquist frequency relates to the minimum sampling rate to avoid aliasing; scintillating is not an imaging term related to grayscale values.

Quantization is the process of assigning a value to each pixel to represent a gray tone. In digital imaging, after sampling the image, the continuous brightness values are mapped to a finite set of discrete gray levels defined by the bit depth (for example, 8-bit depth yields 256 possible levels). This mapping creates the final gray-scale representation and can introduce small errors when original tones fall between representable levels. The other terms describe related but different ideas: sampling is about capturing brightness at discrete locations; Nyquist frequency relates to the minimum sampling rate to avoid aliasing; scintillating is not an imaging term related to grayscale values.