Synonyms
Definition
Multi-focus images are a set of images of the same scene focused at different depths in the scene.
Background
Conventional imaging systems have a finite depth of field (DOF), which depends on the aperture size and the focal length of the lens. The DOF is the depth range within which the scene points appear sharp in the captured image. For scene points within the DOF, the size of the defocus blur is smaller than the minimum acceptable circle of confusion. Often, a single photo is unable to capture the entire scene in sharp focus.
DOF can be increased by decreasing the aperture size (increasing the F-number). However, reducing the aperture size decreases the light throughput, resulting in a dark and noisy image. Multi-focus images offer a solution to increase the DOF without decreasing light throughput. By capturing different photos focused at different depths in the scene and combining them, the entire scene can be brought into focus. This capture...
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Agrawal, A. (2014). Multi-focus Images. In: Ikeuchi, K. (eds) Computer Vision. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-31439-6_445
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DOI: https://doi.org/10.1007/978-0-387-31439-6_445
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