CPC G01S 7/487 (2013.01) [G01S 7/4808 (2013.01); G01S 7/4863 (2013.01); G01S 17/08 (2013.01)] | 18 Claims |
1. A distance measuring device, comprising:
a first circuitry configured to:
acquire a histogram, wherein
the histogram indicates a frequency of reception of reflected light, and
the reflected light includes active light components that are active light emitted from a light emitting unit and reflected by a target object and ambient light components that are ambient light reflected by the target object;
execute a statistical processing operation on the histogram;
detect a distribution of the active light components in the histogram;
obtain, for each histogram of a plurality of histograms, an occurrence rate by dividing each value of the histogram by a specific value, wherein the specific value is obtained by subtracting a smallest frequency from a total number in the histogram,
obtain peaks and peak areas of occurrence rates of the plurality of histograms;
obtain an area of a region of the target object from a ratio between the peak areas; and
measure a distance to the target object as distance information based on the obtained area of the region of the target object.
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