Which statement best describes the starting and processing of the digital image in this context?

• A. It starts as an analog signal and is converted to digital via sampling
• B. It starts as digital code and is amplified
• C. It starts as photons and ends as color channels
• D. It starts as voltage and ends as photos

Answer: (A)

Digital image capture begins with light that the sensor translates into an analog electrical signal. To work with this data on a computer, that continuous signal must be converted into discrete digital values through sampling (and quantization) in an analog-to-digital converter. That step produces the digital image data that can then be processed in the digital domain—applying filters, enhancements, and color handling—before storage or display. The other options miss a part of the actual flow: digital data aren’t merely amplified, the starting input isn’t already digital, and while photons are the initial input, the crucial step is turning that optical signal into digital values via sampling.