Which technique is referred to as HDR in photography?

High dynamic range imaging, commonly known as HDR, is a photographic technique that captures a greater range of luminosity than what is typically possible with standard digital imaging or photographic techniques. The essence of HDR is its ability to reproduce the wide-ranging intensity levels found in real scenes, from the brightest highlights to the darkest shadows.

This technique involves taking multiple photographs of the same scene at different exposure levels—typically one with a standard exposure, one overexposed, and one underexposed. These images are then combined using software to create a final image that preserves detail across the entire range of brightness. This is particularly useful in scenes that have very bright and very dark areas, allowing photographers to create images that more closely resemble what the human eye would see.

Using HDR can result in striking, dynamic images that showcase an impressive array of colors and details, making it popular for landscape photography, architectural images, and other scenarios where there are challenging lighting conditions. The other options do not pertain to this technique, such as reducing file sizes, standard exposure settings, or basic color correction, which do not capture the same range of luminosity that HDR is specifically designed to manage.