Image processing apparatus, image processing method and program
US-2015371123-A1 · Dec 24, 2015 · US
System and method for tone mapping of images
US9420145B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9420145-B2 |
| Application number | US-201414572093-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 16, 2014 |
| Priority date | Jan 13, 2014 |
| Publication date | Aug 16, 2016 |
| Grant date | Aug 16, 2016 |
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Abstract
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A method and imaging device are provided. An image is divided into N zones, and a histogram is generated for each of the N zones. A tone curve is determined for each of the N zones, where tone curve parameters including the controlling of shape and transition point of the curve are based on the histogram of each zone. A tone-mapped value for each pixel of the image is determined based on a sum of M weighted values determined by applying tone curves of M zones to a value of the pixel.
First claim
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It is claimed: 1. A method of processing an image, the method comprising: dividing an image into N zones; and for each respective zone of the N zones, calculating a normalized average luma value (YN avg ) for the respective zone as an average luma value of the zone normalized by a maximum luma value of the image, determining an exposure level for the respective zone, by determining that the exposure level is (i) over-exposure if YN avg is greater than an upper threshold, (ii…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
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- What does patent US9420145B2 cover?
- A method and imaging device are provided. An image is divided into N zones, and a histogram is generated for each of the N zones. A tone curve is determined for each of the N zones, where tone curve parameters including the controlling of shape and transition point of the curve are based on the histogram of each zone. A tone-mapped value for each pixel of the image is determined based on a sum …
- Who is the assignee on this patent?
- Marvell World Trade Ltd
- What technology area does this patent fall under?
- Primary CPC classification H04N1/4074. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 16 2016 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).