# US 2013/0156320 A1 · Method, apparatus and system for determining a saliency map for an input image

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

- Number: US 2013/0156320 A1
- Document ID: US20130156320A1
- Status: Published application
- Kind: A1
- Application number: 13/693,391
- Filed: 2012-12-04
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Assignees: Canon Kabushiki Kaisha
- Inventors: Clement Fredembach
- Web page: https://patentgrep.com/patent/US20130156320A1

## CPC

- G06V 10/462: {Salient features, e.g. scale invariant feature transforms [SIFT]}
- G06T 7/11: Region-based segmentation
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

A method of determining a saliency map (e.g., 900) for an input image (e.g., 600) is disclosed. Pre-determined data defining relative salience of image features is accessed. The input image (600) is decomposed according to the predetermined data to identify features of the input image (600) corresponding to the image features in the predetermined data. A portion of the predetermined data corresponding to a range of the identified image features is selected. A perceptual scale is determined using the selected portion of the predetermined data. The saliency map (900) for the input image using the determined perceptual scale.

## Claims

### Claim 1

A method of determining a saliency map for an input image, said method comprising:
accessing pre-determined data defining relative salience of image features;
decomposing the input image according to the predetermined data to identify features of the input image corresponding to the image features in the predetermined data;
selecting a portion of the predetermined data corresponding to a range of the identified image features;
determining a perceptual scale using the selected portion of the predetermined data; and
determining the saliency map for the input image using the determined perceptual scale.

### Claim 2 (depends on 1)

A method according to claim 1, wherein the predetermined data is obtained based on psychophysical experimentation.

### Claim 3 (depends on 1)

A method according to claim 1, wherein the saliency map is produced in a camera used to capture the input image.

### Claim 4 (depends on 1)

A method according to claim 1, further comprising storing the saliency map as meta data.

### Claim 5 (depends on 1)

A method according to claim 1, further comprising printing one or more elements using the saliency map.

### Claim 6 (depends on 1)

A method according to claim 1, further comprising inputting the saliency map into other applications.

### Claim 7 (depends on 1)

A method according to claim 1, wherein a single feature is identified based on decomposing the input image.

### Claim 8

An apparatus for determining a saliency map for an input image, said apparatus comprising:
means for accessing pre-determined data defining relative salience of image features;
means for decomposing the input image according to the predetermined data to identify features of the input image corresponding to the image features in the predetermined data;
means for selecting a portion of the predetermined data corresponding to a range of the identified image features;
means for determining a perceptual scale using the selected portion of the predetermined data; and
means for determining the saliency map for the input image using the determined perceptual scale.

### Claim 9

A system for determining a saliency map for an input image, said system comprising:
a memory for storing data and a computer program;
a processor coupled to said memory for executing said computer program, said computer program comprising instructions for:
accessing pre-determined data defining relative salience of image features;
decomposing the input image according to the predetermined data to identify features of the input image corresponding to the image features in the predetermined data;
selecting a portion of the predetermined data corresponding to a range of the identified image features;
determining a perceptual scale using the selected portion of the predetermined data; and
determining the saliency map for the input image using the determined perceptual scale.

### Claim 10

A computer readable medium having a computer program stored thereon for determining a saliency map for an input image, said program comprising:
code for accessing pre-determined data defining relative salience of image features;
code for decomposing the input image according to the predetermined data to identify features of the input image corresponding to the image features in the predetermined data;
code for selecting a portion of the predetermined data corresponding to a range of the identified image features;
code for determining a perceptual scale using the selected portion of the predetermined data; and
code for determining the saliency map for the input image using the determined perceptual scale.