What does HDR stand for in photography?

In photography, HDR stands for High Dynamic Range. This technique involves capturing a wider range of luminance levels than what a standard camera can capture in a single exposure. By taking multiple photos at different exposure levels and then combining them, HDR allows photographers to create images that have greater detail in both the shadows and highlights. This results in richer colors and a more realistic representation of the scene, resembling how the human eye perceives light and dark areas.

The other terms do not accurately describe HDR in the context of photography. High Definition Resolution primarily relates to video quality and image clarity, while High Depth Ratio and High Detail Range are not commonly recognized terms within photographic vocabulary. Thus, High Dynamic Range is the only correct answer that captures the essence of the HDR technique used to enhance image quality in photography.