A histogram is a chart based on the tonal distribution of pixels in a picture.
From the left to the right (horizontally) the brightness is indicated, and from the bottom up (vertically) the amount of the photo area of a particular tonality. It is often said that vertical columns simply show the ratios of the number of pixels of a particular pitch. That is, the diagram shows how much light or dark shades prevail in the picture, how many green or red or other shades of colors in the picture are larger. Histograms are different. In photography, basically, three types are used: Continue reading
Distortion is mainly of two types – barrel-shaped (convex, Barrel distortion) and pillow-shaped (concave, Pincushion distortion). Distortion is usually called simple ‘barrel‘ and ‘pillow‘. But there is also a complex or complex distortion (complex distortion), in which the distortions in different areas of the image have a different type and intensity. Complex distortion is quite difficult to correct with the help of graphic editors, since there the distortion can be waves ’. Professional photographers are affectionately referred to as “camel’, sometimes ‘a double-humped camel‘, as such distortion often gives a kind of visual humps and depressions in the image. Continue reading