System and method for high dynamic range digital double sampling
US-10764519-B2 · Sep 1, 2020 · US
System and method for high dynamic range digital double sampling
US11368641B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11368641-B2 |
| Application number | US-202016992492-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 13, 2020 |
| Priority date | Sep 8, 2016 |
| Publication date | Jun 21, 2022 |
| Grant date | Jun 21, 2022 |
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Abstract
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A system and method is provided for performing high dynamic range digital double sampling. More particularly, a CMOS image sensor is provided that includes a pixel array with each pixel sampling both dark and bright values for digital double sampling. After the sampled signals are digitized, a mean dark value is determined and each dark value is further fed to a lookup table that generates an output value taking into account whether the pixel has been saturated. In over exposed conditions, the lookup table will generate a negative value output to eliminate image artifacts. All three values are fed to adder logic circuit that subtracts the mean dark value and the lookup table output from the bright value. This resulting output is fed to a video viewer.
First claim
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What is claimed: 1. An apparatus for correcting pixel data output by an image sensor, the apparatus comprising: a pixel value adjuster configured to subtract a predetermined first pixel value from a corresponding sampled first pixel value of a pixel for a captured image to generate an adjusted first pixel value; an image optimizer configured to determine an illumination correction output value based on the adjusted first pixel value; and an image correction signal generator co…
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- H04N25/65Primary
Electricity · mapped topic
- H04N25/627Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US11368641B2 cover?
- A system and method is provided for performing high dynamic range digital double sampling. More particularly, a CMOS image sensor is provided that includes a pixel array with each pixel sampling both dark and bright values for digital double sampling. After the sampled signals are digitized, a mean dark value is determined and each dark value is further fed to a lookup table that generates an o…
- Who is the assignee on this patent?
- Gvbb Holdings Sarl, Grass Valley Canada
- What technology area does this patent fall under?
- Primary CPC classification H04N25/65. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 21 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).