Toonikaartimine

Toonikaartimine, also known as toon mapping or tone reproduction, is a digital image processing technique used to map a high dynamic range (HDR) image to a low dynamic range (LDR) display. HDR images contain a wider range of luminance values than can be accurately reproduced by standard displays, such as computer monitors or televisions. Toonikaartimine aims to preserve as much visual detail and perceptual information as possible from the original HDR image during this conversion.

The process involves compressing the luminance range of the HDR image while simultaneously enhancing contrast and local details. Various algorithms exist for toonikaartimine, each with different approaches to achieving this goal. Some methods focus on preserving the overall visual appearance, while others prioritize specific aspects like edge preservation or color fidelity. The term "toonikaartimine" itself is derived from the idea of mapping tones or luminance levels.

A key challenge in toonikaartimine is to avoid undesirable artifacts such as posterization, banding, or loss of detail in both the very dark and very bright areas of the image. The effectiveness of a toonikaartimine algorithm is often judged by its ability to produce a visually pleasing and informative LDR image that closely resembles the intended appearance of the HDR source. This technique is widely used in computer graphics, photography, and video processing to make HDR content viewable on everyday devices.