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US 8,013,891 B2Granted
Illuminance acquiring device, illuminance acquiring method, and illuminance acquiring program
AssigneeSeiko Epson Corporation
InventorYoshihito Yamada
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AssigneeSeiko Epson Corporation
InventorYoshihito Yamada
Estimating the term…
An illuminance acquiring device calculates the intensity of light sensed by the image pickup device acquired every different exposure time, and acquires the calculated intensity of light. The illuminance acquiring device including a noise-model data calculating section calculating noise-model data for modeling an influence of a noise generated in the image pickup device by using image pickup data obtained by means of the image pickup at different exposure time; and an illuminance calculating section calculating the output value of the image pickup device in consideration of the influence of the noise from the noise-model data and the output value of the image pickup device, acquiring the light energy by using the calculated output value, and calculating the intensity of the sensed light.
An illuminance acquiring device which acquires light energy corresponding to an output value of an image pickup device every different exposure time by using a correspondence relation between the output value of the image pickup device for converting intensity of sensed light into electric energy and outputting the electric energy and the light energy obtained by multiplying the intensity of light sensed by the image pickup device by the exposure time, calculates the intensity of the light sensed by the image pickup device from the light energy acquired every different exposure time and the correspondence relation, and acquires the calculated intensity of the light sensed by the image pickup device, the illuminance acquiring device comprising:
An illuminance acquiring method of acquiring light energy corresponding to an output value of an image pickup device every different exposure time by using a correspondence relation between the output value of the image pickup device for converting intensity of sensed light into electric energy and outputting the electric energy and the light energy obtained by multiplying the intensity of light sensed by the image pickup device with the exposure time, calculating the intensity of the light sensed by the image pickup device from the light energy acquired every different exposure time and the correspondence relation, and acquiring the calculated intensity of the light sensed by the image pickup device, the illuminance acquiring method comprising:
A non-transitory computer-readable medium configured to store an illuminance acquiring program of acquiring light energy corresponding to an output value of an image pickup device every different exposure time by using a correspondence relation between the output value of the image pickup device for converting intensity of sensed light into electric energy and outputting the electric energy and the light energy obtained by multiplying the intensity of light sensed by the image pickup device with the exposure time, calculates the intensity of light sensed by the image pickup device from the light energy acquired every different exposure time and the correspondence relation, and acquiring the calculated intensity of light sensed by the image pickup device, the illuminance acquiring program comprising:
Dependencies are inferred from the claim text.