Image recognition device and distance image generation method
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsShigeru SAITOU, Shinzo KOYAMA, Masato TAKEMOTO, Motonori ISHII
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Abstract
An image recognition device includes a light source that emits lighting pulses to a measurement space, a image generator that generates a distance image based on reflected light acquired by a light receiving element, a reflectivity calculator that calculates a correction coefficient corresponding to a reflectivity for each measurement section, and a lighting pulse controller that controls a number of lighting pulses emitted from the light source according to the correction coefficient for each measurement section.
Claims9
An image recognition device, comprising:
- a light source that emits lighting pulses to a measurement space;
- a light receiver that receives reflected light from a measurement object present in the measurement space;
- an image generator that receives a light reception signal based on the reflected light from the light receiver and generates a distance image based on the light reception signal;
- a calculator that divides a time range corresponding to a distance in an emission direction of the lighting pulses into a plurality of measurement sections and calculates a correction coefficient corresponding to a reflectivity for each of the plurality of measurement sections;
- and
- a lighting pulse controller that adjusts an emission amount of lighting pulses to be emitted from the light source, according to the correction coefficient for each of the plurality of measurement sections.
A distance image generation method, comprising:
- emitting lighting pulses in a predetermined number to a measurement space, and calculating a correction coefficient corresponding to a reflectivity of a measurement object in the measurement space from a distance to the measurement object and an intensity of reflected light;
- and
- emitting further lighting pulses of an emission amount corresponding to the correction coefficient to the measurement object, and
- generating a distance image based on reflected light of the further lighting pulses.
Dependencies are inferred from the claim text.