Patent ID: 11867870
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 9:
10. A non-transitory computer readable medium storing a fog determination program for causing a computer to execute:
a point data acquisition process to acquire point data indicating a reflection point obtained by an optical sensor that receives reflected light of an emitted light beam reflected at the reflection point;
an image data acquisition process to acquire image data of an area around the reflection point indicated by the point data acquired by the point data acquisition process;
a luminance calculation process to calculate, as a value indicating smoothness of luminance of the image data, a sum of absolute values of values resulting from calculating a second derivative of luminance of each pixel constituting one or more horizontal lines of the image data acquired by the image data acquisition process; and
a fog determination process to determine a density of fog based on a distance, which is determined from the point data, from the optical sensor to the reflection point and the smoothness of the luminance calculated by the luminance calculation process.