Image system and denoising method therefor

摘要

There is provided an image system including at least one image sensor, a light source and a processing unit. The at least one image sensor sequentially acquires at least two images within each of the brightness variation intervals of an ambient light source. The light source lights once within each of the brightness variation intervals and the lighting of the light source is synchronized to one of the images acquired by the at least one image sensor. The processing unit calculates an image difference between the image synchronizing to the lighting of the light source and the image not synchronizing to the lighting of the light source thereby eliminating interference from the ambient light source. There is further provided a denoising method for an image system.

主权项

1. A denoising method for an image system, the image system comprising at least one image sensor and a light source and operating under an ambient light, which has a brightness value varying with brightness variation intervals, the denoising method comprising the steps of:
using the image sensor to sequentially acquire an odd number of at least three images within each of the brightness variation intervals; lighting the light source once within each of the brightness variation intervals, wherein the lighting of the light source is synchronized to a middle image of the odd number of at least three images; and subtracting a sum or an average of the other images not synchronized to the lighting of the light source from the middle image synchronized to the lighting of the light source thereby eliminating interference from the ambient light.