How Phone Cameras Merge Several Exposures
How Phone Cameras Merge Several Exposures
Computational photography can combine short captures to recover detail in dark and bright parts of a scene.
A phone may take a burst around the time the shutter is pressed. Software aligns the images and chooses how to combine cleaner shadows, sharp edges and highlights from different captures.
Movement complicates that alignment. Hair, water or a fast-moving person can produce artifacts, and aggressive processing can change the texture of skin or foliage.
Photograph both a still scene and a moving subject under the same lighting. The comparison shows where the camera's processing adds useful detail and where it alters the scene.
