# US 2010/0165104 A1 · Drive Assistance Device

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- Number: US 2010/0165104 A1
- Document ID: US20100165104A1
- Status: Published application
- Kind: A1
- Application number: 12/294,829
- Filed: 2007-03-23
- Published: 2010-07-01
- Earliest claimed: 2006-03-27
- Assignees: Sanyo Electric Co., Ltd.
- Inventors: Hideto Fujita; Yohei Ishii; Hitoshi Hongo
- Web page: https://patentgrep.com/patent/US20100165104A1

## CPC

- G06T 3/047: Fisheye or wide-angle transformations
- G06T 3/00: Geometric image transformations in the plane of the image
- G06T 5/80: Geometric correction
- H04N 23/631: {Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters}
- B60R 2300/30: characterised by the type of image processing
- B60R 2300/402: Image calibration
- H04N 25/61: the noise originating only from the lens unit, e.g. flare, shading, vignetting or "cos4"
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR

## Abstract

A drive assistance device has an imaging device (1) mounted on a vehicle body and imaging a region surrounding the vehicle body, lens distortion correction means (2) for performing lens distortion correction for an inputted image taken by the imaging device (1), and a display (3) for displaying the image obtained by the lens distortion correcting means (2). The lens distortion correction means (2) divides the inputted image into multiple regions and performs lens distortion correction for each of the regions with different distortion correction level.

## Claims

### Claim 1

A drive assistance device comprising:
an imaging device mounted on a vehicle body for imaging a region surrounding the vehicle body;
lens distortion correction means for performing lens distortion correction on an input image picked up by the imaging device; and
a display for displaying the image obtained by the lens distortion correction means, wherein
the lens distortion correction means divides the input image into a plurality of regions, and performs lens distortion correction with distortion correction level varying with the regions.

### Claim 2 (depends on 1)

The drive assistance device according to claim 1, wherein
the lens distortion correction means divides the input image into the plurality of regions in response to the distance from the vehicle body and/or the angle of depression of a camera, and performs lens distortion correction with the distortion correction level varying with the regions.

### Claim 3 (depends on 1, 2)

The drive assistance device according to claim 1 or 2, comprising region setting means for setting the plurality of regions and distortion correction level decision means for deciding the distortion correction level every region set by the region setting means, wherein
the lens distortion correction means performs lens distortion correction responsive to the distortion correction level decided by the distortion correction level decision means every region on the input image.

### Claim 4 (depends on 1, 2)

The drive assistance device according to claim 1 or 2, comprising temporary region setting means for temporarily setting the plurality of regions, temporary distortion correction level decision means for temporarily deciding distortion correction level every region temporarily set by the temporary region setting means, means for displaying an effect of distortion correction responsive to the distortion correction level temporarily decided by the temporary distortion correction level decision means every region on the display with grid lines, and formal setting means for formally setting the distortion correction level temporarily decided by the temporary distortion correction level decision means every region as intrinsic distortion correction level every region, wherein
the lens distortion correction means performs lens distortion correction responsive to the distortion correction level formally set by the formal setting means every region on the input image.