In digital imaging, which device converts the analog signal into digital data?

In digital imaging, which device converts the analog signal into digital data?

• A. Digital-to-analog converter
• B. Flux capacitor
• C. Analog-to-digital converter
• D. DVD-ROM

Answer: (C)

An analog-to-digital converter turns a continuous analog signal into discrete digital data. In digital imaging, the light that hits a sensor is converted into a continuous electrical signal that represents brightness for each pixel. The ADC samples that signal at regular intervals and assigns each sample a finite digital value, translating the continuous levels into a set of binary numbers. This process, called sampling and quantization, lets the image be stored, processed, and displayed using digital systems. The sampling rate affects temporal resolution and potential aliasing, while the bit depth determines the precision and dynamic range of each pixel. The other options don’t fit because a digital-to-analog converter does the opposite: it converts digital values back into an analog signal. A flux capacitor is a fictional device, and a DVD-ROM is just a storage medium, not a signal converter.

An analog-to-digital converter turns a continuous analog signal into discrete digital data. In digital imaging, the light that hits a sensor is converted into a continuous electrical signal that represents brightness for each pixel. The ADC samples that signal at regular intervals and assigns each sample a finite digital value, translating the continuous levels into a set of binary numbers. This process, called sampling and quantization, lets the image be stored, processed, and displayed using digital systems. The sampling rate affects temporal resolution and potential aliasing, while the bit depth determines the precision and dynamic range of each pixel.

The other options don’t fit because a digital-to-analog converter does the opposite: it converts digital values back into an analog signal. A flux capacitor is a fictional device, and a DVD-ROM is just a storage medium, not a signal converter.