Methods and apparatus for enhancing optical images and parametric databases
US-11967046-B2 · Apr 23, 2024 · US
Shadow detection method and device
US9142011B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9142011-B2 |
| Application number | US-201414276053-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 13, 2014 |
| Priority date | May 15, 2013 |
| Publication date | Sep 22, 2015 |
| Grant date | Sep 22, 2015 |
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Abstract
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Disclosed are a shadow detection method and device. The method includes a step of obtaining a depth/disparity map and color/grayscale image from a two-lens camera or stereo camera; a step of detecting and acquiring plural foreground points; a step of projecting the acquired plural foreground points into a 3-dimensional coordinate system; a step of carrying out, in the 3-dimensional coordinate system, a clustering process with respect to the projected plural foreground points so as to divide the projected plural foreground points into one or more point clouds; a step of calculating density distribution of each of the one or more point clouds by adopting a principal component analysis algorithm so as to obtain one or more principal component values of the corresponding point cloud; and a step of determining, based on the one or more principal component values, whether the corresponding point cloud is a shadow.
First claim
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What is claimed is: 1. A shadow detection method comprising: a step of obtaining a depth/disparity map and color/grayscale image from a two-lens camera or stereo camera; a step of detecting and acquiring plural foreground points; a step of projecting the acquired plural foreground points into a 3-dimensional coordinate system; a step of carrying out, in the 3-dimensional coordinate system, a clustering process with respect to the projected plural foreground points so as to d…
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Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9142011B2 cover?
- Disclosed are a shadow detection method and device. The method includes a step of obtaining a depth/disparity map and color/grayscale image from a two-lens camera or stereo camera; a step of detecting and acquiring plural foreground points; a step of projecting the acquired plural foreground points into a 3-dimensional coordinate system; a step of carrying out, in the 3-dimensional coordinate s…
- Who is the assignee on this patent?
- Fan Shengyin, Wang Xin, Wang Qian, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G06T5/008. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 22 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).