# US 2021/0243367 A1 · Wide-angle image providing system

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- Number: US 2021/0243367 A1
- Document ID: US20210243367A1
- Status: Published application
- Kind: A1
- Application number: 17/050,460
- Filed: 2019-04-26
- Published: 2021-08-05
- Earliest claimed: 2018-04-26
- Assignees: Tenntwo Co., Ltd.
- Applicants: Tenntwo Co., Ltd.
- Inventors: Seong Yeul PARK
- Web page: https://patentgrep.com/patent/US20210243367A1

## CPC

- H04N 23/951: by using two or more images to influence resolution, frame rate or aspect ratio
- G06T 5/50: using two or more images, e.g. averaging or subtraction
- G06T 5/80: Geometric correction
- G06T 7/80: Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
- H04N 7/183: {for receiving images from a single remote source}
- H04N 9/68: for controlling the amplitude of colour signals, e.g. automatic chroma control circuits (H04N9/71, H04N9/73 take precedence; camera processing pipelines for controlling the colour saturation of colour signals H04N23/86)
- H04N 17/002: {for television cameras}
- H04N 23/45: for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
- H04N 23/51: Housings
- H04N 23/698: for achieving an enlarged field of view, e.g. panoramic image capture
- G06T 2207/10016: Video; Image sequence
- G06T 2207/10024: Color image
- G06T 2207/30232: Surveillance
- H04N 23/90: Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

The present invention relates to a wide-angle image providing system including: a first camera module for generating a first area image generated by capturing a first area; a second camera module for generating a second area image generated by capturing a second area which is adjacent to the first area; and calibration processing unit for carrying out distortion correction and phase difference correction for the first and second area images, respectively, and carrying out overlap correction and color correction for the first and second area images which have been calibrated for phase difference.

## Claims

### Claim 1

A system for providing a wide-angle image, comprising:
a first camera module generating a first area image of a first area;
a second camera module generating a second area image of a second area neighboring the first area; and
a calibration processor calibrating distortion and a phase difference between the first and second area images and calibrating superimposition and color of the first and second area images whose phase differences have been calibrated.

### Claim 2 (depends on 1)

The system of claim 1, wherein the calibration processor comprises:
a distortion calibration unit calibrating the distortion of each of the first and second area images;
a phase difference calibration unit calibrating the phase difference of each of the first and second area images whose distortion has been calibrated;
an overlap calibration unit calibrating the first and second area images whose phases have been calibrated in an overlap manner so that the first and second area images neighbor each other; and
a color calibration unit calibrating the color of the superimposed and calibrated overlap image.

### Claim 3 (depends on 2)

The system of claim 2, wherein:
the distortion calibration unit calibrates wide-angle distortion of each of the first and second area images and then calibrates distance distortion,
the phase difference calibration unit extracts a horizontal reference point of the first and second area images and then adjusts locations of the first and second area images by rotating and moving coordinates,
the overlap calibration unit adjusts a size of each of the first and second area images and then adjusts locations of the first and second area images so that the first and second area images overlap by moving the coordinates, and
the color calibration unit calibrates brightness and chromatic aberration of the superimposed and calibrated overlap image.

### Claim 4 (depends on 1)

The system of claim 1, wherein the first camera module comprises:
a first lens module;
a first image sensor module generating the first area image of the first area photographed through the first lens module; and
a first structure in which the first lens module and the first image sensor module are received, and
the second camera module comprises:
a second lens module;
a second image sensor module generating the second area image of the second area photographed through the second lens module; and
a second structure in which the second lens module and the second image sensor module are received.

### Claim 5 (depends on 4)

The system of claim 4, further comprising:
first and second link units each coupled to one side of each of the first and second camera modules; and
a circular plate rotated by a motor and comprising curve grooves where the respective first and second link units are coupled and moved.

### Claim 6 (depends on 5)

The system of claim 5, wherein:
the first and second camera modules each has the other side, facing the one side, mutually coupled by hinges, and
the first and second link units are moved in the curve grooves by the rotation of the circular plate and adjust an angle formed by the first and second camera modules.

### Claim 7

A system for providing a wide-angle image, comprising:
a first camera module generating a first area image of a first area;
a second camera module generating a second area image of a second area neighboring a right of the first area;
a third camera module generating a third area image of a third area neighboring a lower side of the first area or generating a third area image of a third area which is an opposite side of the first area;
a fourth camera module generating a fourth area image of a fourth area neighboring a lower side of the second area and a right of the third area or generating a fourth area image of a fourth area which is an opposite side of the second area and neighbors a left of the third area; and
a calibration processor calibrating distortion and a phase difference of each of the first, second, third and fourth area images and calibrating superimposition and color of the first, second, third and fourth area images whose phase differences have been calibrated.

### Claim 8 (depends on 7)

The system of claim 7, wherein the calibration processor comprises:
a distortion calibration unit calibrating the distortion of each of the first, second, third and fourth area images;
a phase difference calibration unit calibrating the phase difference of each of the first, second, third and fourth area images whose distortion has been calibrated;
an overlap calibration unit calibrating the first, second, third and fourth area images whose phases have been calibrated in an overlap manner so that the first, second, third and fourth area images neighbor each other; and
a color calibration unit calibrating the color of the superimposed and calibrated overlap image.

### Claim 9 (depends on 8)

The system of claim 8, wherein:
the distortion calibration unit calibrates wide-angle distortion of each of the first, second, third and fourth area images and then calibrates distance distortion,
the phase difference calibration unit extracts a horizontal reference point of the first, second, third and fourth area images and then adjusts locations of the first, second, third and fourth area images by rotating and moving coordinates,
the overlap calibration unit adjusts a size of each of the first, second, third and fourth area images and then adjusts locations of the first, second, third and fourth area images so that the first, second, third and fourth area images overlap by moving the coordinates, and
the color calibration unit adjusts brightness and chromatic aberration of the superimposed and calibrated overlap image.

### Claim 10 (depends on 7)

The system of claim 7, wherein the first camera module comprises:
a first lens module;
a first image sensor module generating the first area image of the first area photographed through the first lens module; and
a first structure in which the first lens module and the first image sensor module are received,
the second camera module comprises:
a second lens module;
a second image sensor module generating the second area image of the second area photographed through the second lens module; and
a second structure in which the second lens module and the second image sensor module are received,
the third camera module comprises:
a third lens module;
a third image sensor module generating the third area image of the third area photographed through the third lens module; and
a third structure in which the third lens module and the third image sensor module are received, and
the fourth camera module comprises:
a fourth lens module;
a fourth image sensor module generating the fourth area image of the fourth area photographed through the fourth lens module; and
a fourth structure in which the fourth lens module and the fourth image sensor module are received.

### Claim 11 (depends on 10)

The system of claim 10, further comprising:
first and second link units each coupled to one side of each of the first and second camera modules;
third and fourth link units each coupled to one side of each of the third and fourth camera modules; and
a circular plate rotated by a motor and comprising curve grooves where the first, second, third and fourth link units are coupled and moved.

### Claim 12 (depends on 11)

The system of claim 11, wherein:
the first and second camera modules each have the other side, facing the one side, mutually coupled by hinges,
the third and fourth camera modules each have the other side, facing the one side, mutually coupled by hinges,
the first and second link units are moved in the curve grooves by the rotation of the circular plate and adjust an angle formed by the first and second camera modules, and
the third and fourth link units are moved in the curve grooves by the rotation of the circular plate and adjust an angle formed by the third and fourth camera modules.