Imager with active exposure correction
First Claim
1. An imager module for a vehicle comprising:
- an imager configured to capture image data over a plurality of image frames based on incoming light in a field of view;
an electro-optic device configured to vary in transmittance controlling a transmission of the incoming light into the imager; and
a controller in communication with the imager and the electro-optic device, wherein the controller is configured to;
identify an exposure time for the imager based on environmental lighting conditions in the field of view;
control the exposure time based on the environmental lighting conditions;
identify a light source having a periodic activation;
adjust the exposure time to an adjusted exposure based on a periodicity of the periodic activation; and
control the transmittance of the electro-optic device controlling the average transmission of the incoming light, wherein the average transmission of the electro-optic device is maintained over a plurality of cycles of the periodic activation.
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Accused Products
Abstract
An imager module for a vehicle is disclosed. The imager module comprises an imager configured to capture image data over a plurality of image frames based on incoming light in a field of view and an optic device configured to control a transmission of the incoming light. The module comprises a controller configured to identify an exposure time for the imager based on environmental lighting conditions and adjust the exposure time by a flicker mitigation period. The adjustment of the exposure time mitigates an appearance of a periodic light source in the image data. The controller is further configured to control the transmission of the optic device to control the transmission of the incoming light.
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Citations
19 Claims
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1. An imager module for a vehicle comprising:
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an imager configured to capture image data over a plurality of image frames based on incoming light in a field of view; an electro-optic device configured to vary in transmittance controlling a transmission of the incoming light into the imager; and a controller in communication with the imager and the electro-optic device, wherein the controller is configured to; identify an exposure time for the imager based on environmental lighting conditions in the field of view; control the exposure time based on the environmental lighting conditions; identify a light source having a periodic activation; adjust the exposure time to an adjusted exposure based on a periodicity of the periodic activation; and control the transmittance of the electro-optic device controlling the average transmission of the incoming light, wherein the average transmission of the electro-optic device is maintained over a plurality of cycles of the periodic activation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An imager module for a vehicle comprising:
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an imager configured to capture image data over a plurality of image frames based on incoming light in a field of view; an optic device configured to control an average transmission of the incoming light into the imager over the plurality of image frames; and a controller in communication with the imager and the optic device, wherein the controller is configured to; identify an exposure time for the imager based on environmental lighting conditions in the field of view; adjust the exposure time mitigating an appearance of a periodic light source in the image data; and control a transmittance of the optic device controlling the average transmission of the incoming light, wherein the transmission of the optic device is maintained limiting the average luminance of the light entering the imager from exceeding a saturation threshold over the plurality of image frames. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for capturing image data for a vehicle imaging system, the method comprising:
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capturing image data in a field of view of an imager; identifying an exposure time for the imager based on an environmental lighting condition in the field of view; controlling an exposure time based on the environmental lighting conditions; controlling a transmission of an electro-optic device controlling a transmission of the environmental light transmitted through the electro-optic device; and extending the exposure time by controlling the average transmission of the light entering the imager, wherein the transmission of the optic device is maintained over a plurality of continuous image frames limiting the average luminance of a plurality of pixels of the imager from exceeding a saturation threshold. - View Dependent Claims (16, 17, 18, 19)
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Specification