METHOD FOR DETERMINING THE LUMINANCE OF TRAFFIC SIGNS AND DEVICE FOR IMPLEMENTING SAME

摘要

The procedure of the present invention is based on: - Obtaining a sequence of at least two images with different illumination levels.
- Extracting the region where the sign is on the image.
- Calculating the luminance values of the signs.
- Obtaining the difference in luminance of the sign corresponding to the two illumination levels. The value obtained is the luminance of the sign (11) corresponding to an illumination equal to the difference in the illuminations, or additional illumination. This result is based on the additive property of luminance, according to which the luminance of a sign is the sum of the luminances produced by each light source. In order to embody the procedure it is necessary to have a base illumination device (5), an additional illumination device (7), at least one camera for the image capture, and image recording, positioning and synchronism systems.