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Image resolution is the level of detail of an image. The term applies to digital images, film images, and other types of images. "Higher resolution" means more image detail. Image resolution can be measured in various ways. Resolution quantifies how close lines can be to each other and still be visibly resolved. Resolution units can be tied to ...
A featured picture : Is of a high technical standard. It has good contrast, accurate exposure and neutral colour balance. It shows no significant compression artifacts, burned-out highlights, image noise ("graininess") or other processing anomalies. Examples of common technical problems can be found here. Its main subject is in focus, it has ...
Structural similarity index measure. The structural similarity index measure (SSIM) is a method for predicting the perceived quality of digital television and cinematic pictures, as well as other kinds of digital images and videos. It is also used for measuring the similarity between two images. The SSIM index is a full reference metric; in ...
Check composition Cropping an image to remove irrelevant parts of it can make the subject more prominent and improve its visual balance. If the centre of a scene isn't vertical or the horizon isn't horizontal, it might also be an idea to rotate it before cropping. Check color Make sure the colours look natural.
The ability of a lens to resolve detail is usually determined by the quality of the lens, but is ultimately limited by diffraction.Light coming from a point source in the object diffracts through the lens aperture such that it forms a diffraction pattern in the image, which has a central spot and surrounding bright rings, separated by dark nulls; this pattern is known as an Airy pattern, and ...
Image fidelity refers to the ability of a process to render a given copy in a perceptually similar way to the original (without distortion or information loss), i.e., through a digitization or conversion process from analog media to digital image. The process of determining the level of accuracy is called Image Quality Assessment (IQA).
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