Computer Hacking Forensic Investigator (CHFI) Practice Exam 2025 - Free CHFI Practice Questions and Comprehensive Study Guide

Bit depth is a critical aspect of digital images as it directly influences the color fidelity, which refers to the accuracy and richness of colors that can be represented in an image. A higher bit depth allows for a greater range of colors to be displayed. For example, an 8-bit image can represent 256 different colors, while a 24-bit image can represent over 16 million colors. This increased color depth results in smoother gradients and more accurate color reproduction, vital for applications like digital photography and graphic design.

The other choices relate to different attributes of an image. The file format pertains to how data is structured and stored and does not influence color fidelity directly. Resolution refers to the amount of detail an image holds, usually described by the dimensions (width x height) in pixels, not the color depth. Compression ratio affects how much the file size is reduced but also does not directly inform color accuracy.