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US 8,508,609 B2Granted
Image pickup apparatus, imaging method and method for correcting infrared light
AssigneeKYOCERA Corporation
InventorsNaoto Ohara, Yusuke Hayashi, Tomoya Sugita
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Abstract
An image pickup device comprising visible color optimization under received near-infrared and infrared light conditions is disclosed. Color signals corresponding to light received through each of a plurality of color filters are processed to determine a near-infrared and infrared light energy contribution. The color signals are processed to optimize color of received images.
Claims16
An image pickup apparatus comprising:
- a group of color filters comprising a plurality of colors, the group of color filters comprising a first color filter comprising a first color having a first spectral characteristic;
- an image pickup device operable to output a plurality of color signals corresponding to light transmitted through each color filter in the group of color filters respectively, the color signals comprising a first color signal corresponding to the first color filter;
- and
- a color processing unit operable to:
- combine the color signals excluding the first color signal to obtain a second color signal having a second spectral characteristic substantially equal to the first spectral characteristic in a visible region;
- and
- adjust a gain of the second color signal such that the first color signal and the second color signal are substantially matched with each other in a visible region;
- and
- compare the first color signal to the second color signal to obtain incident light quantities in near-infrared and infrared regions.
6 more elements
A method for correcting infrared light comprising:
- generating a first color signal corresponding to light received through a first color filter, the first color signal having a first spectral characteristic;
- computing a second color signal by combining color signals of light transmitted through at least two color filters which are different from the first color filter;
- performing a correction to the second color signal by adjusting a gain of the second color signal to obtain a corrected second color signal having a second spectral characteristic substantially equal to the first spectral characteristic in a visible region;
- and
- estimating an incident light quantity in an infrared region by comparing the first color signal and the corrected second color signal.
2 more elements
An imaging method, comprising:
- receiving a plurality of light rays transmitted through a group of color filters comprising a first color filter of a first color having a first spectral characteristic;
- generating a plurality of color signals corresponding to the light rays transmitted through the group of color filters respectively, the color signals comprising a first color signal corresponding to first light rays transmitted through the first color filter;
- computing a second color signal by combining at least two color signals corresponding to light rays transmitted through at least two color filters that are different from the first color filter;
- performing a correction to the second color signal by adiusting a gain of the second color signal to obtain a corrected second color having a second spectral characteristic substantially equal to the first spectral characteristic in a visible region;
- and
- estimating incident light quantities in near-infrared and infrared regions by comparing the first color signal and the corrected second color signal.
3 more elements
Dependencies are inferred from the claim text.