Viitepintoja
Viitepintoja, literally “reference spots,” is a Finnish term describing standardized patches, spots, or markers used as calibration or alignment references in imaging, printing, and measurement workflows. The core idea is to provide known, repeatable targets that can be detected in data to correct for variations in color, scale, pose, or lens distortion.
They appear in several domains. In photography and printing, color reference patches or color checkers serve
Form and detection: Viitepintoja can take the form of grids of colored patches, grayscale steps, or fiducial
Standards and considerations: The exact size, color values, and spacing depend on the domain and the equipment