MoiréGitters

MoiréGitters is a phenomenon observed in digital imaging and display technologies. It occurs when two similar patterns, often with slight differences in spacing or angle, are superimposed. This superimposition can create a new, often undesirable, visual pattern that appears as wavy lines, speckles, or moiré fringes. These moiré patterns are not present in the original source material but are an artifact of the sampling and reconstruction processes.

In digital cameras, moiré can arise when capturing an image of a finely patterned surface, such as fabric or a screen, with a resolution that is too close to the pattern's density. The camera's sensor, which has its own grid of pixels, interacts with the object's pattern, leading to interference. Similarly, when displaying images on screens, if the pixel structure of the display interacts with the patterns within the image, moiré effects can become visible.

The visual appearance of moiréGitters can vary greatly depending on the specific patterns involved and their relative orientations. While sometimes perceived as an interesting visual effect, in many contexts, particularly in scientific imaging, printing, and high-fidelity displays, moiréGitters is considered an error that degrades image quality. Techniques to mitigate moiréGitters include anti-aliasing filters, adjusting sampling rates, or altering the display or capture resolution.