Optical system with dynamic distortion using freeform elements
US-11867898-B2 · Jan 9, 2024 · US
Two-dimensional lens shading correction
US8970744B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8970744-B2 |
| Application number | US-49667709-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 2, 2009 |
| Priority date | Jul 2, 2009 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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In one embodiment of the invention, there is provided a method of correcting a captured image for lens shading artifacts, comprising for a given lens determining a function L(x,y) being a lens shading correction function to be applied to images captured by the lens in order to correct for lens shading artifacts; applying a sampling technique to sample the function L(x,y) at selected points; and storing the sampled function L(x,y) in memory.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of correcting a captured image for lens shading artifacts, comprising: capturing a plurality of reference images with a lens; averaging the plurality of captured reference images to determine a single reference image; using the determined single reference image to determine, for the lens, a two-dimensional lens shading correction function L(x,y) which is a function of an image location (x,y) and which is to be applied to subsequent images…
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- H04N25/61Primary
Electricity · mapped topic
- H04N5/3572Primary
Electricity · mapped topic
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- What does patent US8970744B2 cover?
- In one embodiment of the invention, there is provided a method of correcting a captured image for lens shading artifacts, comprising for a given lens determining a function L(x,y) being a lens shading correction function to be applied to images captured by the lens in order to correct for lens shading artifacts; applying a sampling technique to sample the function L(x,y) at selected points; and…
- Who is the assignee on this patent?
- Nguyen Hugh Phu, Imagination Tech Ltd
- What technology area does this patent fall under?
- Primary CPC classification H04N25/61. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 03 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).