# US 8,150,199 B2 · Methods and apparatus for image enhancement

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,150,199 B2
- Document ID: US8150199B2
- Status: Granted
- Kind: B2
- Application number: 12/045,366
- Filed: 2008-03-10
- Published: 2008-10-02
- Granted: 2012-04-03
- Earliest claimed: 2007-03-29
- Assignees: Texas Instruments Incorporated
- Inventors: Jianping Zhou
- Web page: https://patentgrep.com/patent/US8150199B2

## CPC

- H04N 23/81: for suppressing or minimising disturbance in the image signal generation
- G06T 5/73: Deblurring; Sharpening
- G06T 2207/20016: Hierarchical, coarse-to-fine, multiscale or multiresolution image processing; Pyramid transform
- G06T 2207/20192: Edge enhancement; Edge preservation
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

A method and apparatus of enhancing an image, the method comprising applying at least one multi-scale filter bank to at least a portion of an image to detect at least one edge at different scales, and combining the detected edges with said image to yield an enhanced to at least a portion of the image.

## Claims

### Claim 1

A method of enhancing an image, comprising:
applying at least one multi-scale filter bank to at least a portion of an image to detect at least one edge at different scales; and
combining the detected edges with said image to yield an enhanced to at least a portion of the image;
creating a multi-scale representation of at least a portion of an image; and
applying a nonlinear mapping on a multi-scale highpass subband coefficient.

### Claim 2 (depends on 1)

The method of claim 1, wherein the multi-scale representation of at least the portion of the image and the nonlinear mapping on the multi-scale highpass subband coefficient are utilized to create the enhanced to at least a portion of the image.

### Claim 3 (depends on 1)

The method of claim 1, wherein the method is utilized to at least one of detecting noise, ignoring noise, detecting weak edges, enhancing weak edges, detecting strong edges, or ignoring strong edges.

### Claim 4

An image enhancing apparatus, comprising:
means for applying at least one multi-scale filter bank to at least a portion of an image to detect at least one edge at different scales; and
means for combining the detected edges with said image to yield an enhanced to at least a portion of the image.

### Claim 5 (depends on 4)

The method of claim 4, wherein the means for applying multi-scale filter banks step comprises:
means for creating a multi-scale representation of at least a portion of an image; and
means for applying a nonlinear mapping on a multi-scale highpass subband coefficient.

### Claim 6 (depends on 5)

The method of claim 5, wherein the multi-scale representation of at least the portion of the image and the nonlinear mapping on the multi-scale highpass subband coefficient are utilized to create the enhanced to at least a portion of the image.

### Claim 7 (depends on 4)

The method of claim 4 wherein the image enhancing apparatus is utilized to at least one of detecting noise, ignoring noise, detecting weak edges, enhancing weak edges, detecting strong edges, or ignoring strong edges.

### Claim 8

A non-transitory computer readable medium having instructions stored thereon that, when executed by a processor, causes the processor to perform a method of enhancing at least a portion of an image, the method comprising:
applying at least one multi-scale filter bank to at least a portion of an image to detect at least one edge at different scales; and
combining the detected edges with said image to yield an enhanced to at least a portion of the image;
creating a multi-scale representation of at least a portion of an image; and
applying a nonlinear mapping on a multi-scale highpass subband coefficient.

### Claim 9 (depends on 8)

The non-transitory computer readable medium of claim 8, wherein the multi-scale representation of at least the portion of the image and the nonlinear mapping on the multi-scale highpass subband coefficient are utilized to create the enhanced to at least a portion of the image.

### Claim 10 (depends on 8)

The non-transitory computer readable medium of claim 8, wherein the method is utilized to at least one of detecting noise, ignoring noise, detecting weak edges, enhancing weak edges, detecting strong edges, or ignoring strong edges.