Pikselikohtaisesti

Pikselikohtaisesti is a Finnish term used in digital imaging and computer science to describe operations that are performed at the level of individual pixels. It denotes a per-pixel approach, in which processing or analysis is applied separately to each image element, rather than to larger regions or using information from neighboring pixels. The expression is common in technical writing, documentation, and discussions of image processing, video encoding, and computer vision.

The term is formed from the Finnish words pikseli (pixel) and kohtainen (related to a point or manner) with the adverb suffix -isesti, yielding “in a per-pixel manner.” In practice, pikselikohtaisesti means that changes, comparisons, or analyses are carried out on a pixel-by-pixel basis.

Typical applications include per-pixel color adjustments, pixel-wise differencing for change detection, thresholding, and simple lossless or lossy compression schemes that encode values independently. It is also used to describe straightforward scripts or algorithms that compute pixel-wise metrics such as absolute differences, mean squared error, or other per-pixel statistics.

Limitations of per-pixel approaches include neglecting spatial relationships, which can lead to artifacts or inefficient results for high-resolution media. Per-pixel methods are often easy to implement and highly parallelizable, but may be combined with higher-level, region-based or convolution-based techniques to incorporate context.

See also: pixel, pixel-level processing, image processing, thresholding, convolution.