VEHICLE VISION SYSTEM WITH REDUCTION OF TEMPORAL NOISE IN IMAGES

摘要

A vision system of a vehicle includes a camera disposed at a vehicle and having a field of view exterior of the vehicle. The camera includes an imaging array having rows and columns of photosensing elements that may include red light sensing elements, green light sensing elements and blue light sensing elements. An image processor is operable to process image data captured by the camera. A display is disposed in the vehicle and viewable by a driver of the vehicle and is operable to display images derived from captured image data. Responsive to image processing of captured image data by the image processor, temporal noise in images derived from captured image data is reduced by determining a change in luminance of photosensing elements from a first frame of captured image data to a second frame of captured image data.

主权项

1. A vision system of a vehicle, said vision system comprising:
a camera disposed at a vehicle and having a field of view exterior of the vehicle; wherein said camera comprises an imaging array having rows and columns of photosensing elements; an image processor operable to process image data captured by said camera; a display disposed in the vehicle and viewable by a driver of the vehicle, wherein said display is operable to display images derived from captured image data; wherein, responsive to image processing of captured image data by said image processor, temporal noise in displayed images derived from captured image data is reduced by determining a change in luminance of photosensing elements from a first frame of captured image data to a second frame of captured image data and adjusting luminance values of photosensing elements for the displayed derived image responsive, at least in part, to the determined change in luminance of photosensing elements being above or below a threshold change; and wherein luminance values of photosensing elements for the displayed derived image are adjusted by adjusting a weighting ratio of luminance values in said first frame of captured image data to luminance values in said second frame of captured image data.