Calibration method of an image capture system

• US 10,148,944 B2
• Filed: 05/22/2017
• Issued: 12/04/2018
• Est. Priority Date: 02/19/2014
• Status: Active Grant

• Current Assignee: EYS3D Microelectronics, Co.
• Original Assignee: EYS3D Microelectronics, Co.
• Inventors: Lee, Chi-Feng
• Primary Examiner(s): Tran, Trang U
• Application Number:
  US15/600,799
• Publication Number:
  US 20170257626A1
• Time in Patent Office: 561 Days
• Field of Search: 348187, 348188, 348180
• CPC Class Codes: H04N 17/002 for television cameras

Abstract

A calibration method of an image capture system includes an image capture device of at least one image capture device capturing an image including a plurality of intersection coordinates among a plurality of geometric blocks of a test pattern and an information of a color of each geometric block of the plurality of geometric blocks; an operation unit executing a first operation on the plurality of intersection coordinates within the image to generate a plurality of geometric calibration parameters; the operation unit executing a second operation on an information of a color of each geometric block of the plurality of geometric blocks within the image to generate a plurality of color calibration parameters; and a calibration unit calibrating the image capture device according to the plurality of geometric calibration parameters and the plurality of color calibration parameters.

Claims

1. A calibration method of an image capture system, wherein the image capture system comprises at least one image capture device and a calibration unit, a device applied to the calibration method comprises an operation unit, and each test pattern of a plurality of test patterns comprises a plurality of geometric blocks, the calibration method comprising:

an image capture device of the at least one image capture device capturing an image comprising a plurality of intersection coordinates among the plurality of geometric blocks of the each test pattern, wherein the image comprises a plurality of color information of the plurality of geometric blocks of the each test pattern;

the operation unit executing a first operation on a plurality of intersection coordinates among a plurality of geometric blocks comprised in each image of a plurality of images corresponding to the plurality of test patterns to generate a plurality of geometric calibration parameters;

the operation unit executing a second operation on a plurality of color information of a plurality of geometric blocks comprised in at least one image of the plurality of images corresponding to the plurality of test patterns to generate a plurality of color calibration parameters for different colors of the plurality of geometric blocks comprised in the at least one image; and

the calibration unit calibrating the image capture device according to the plurality of geometric calibration parameters and the plurality of color calibration parameters.

2. The calibration method of claim 1, wherein a color of the each geometric block of the plurality of geometric blocks is different from a color of a substrate supporting the each test pattern and is used for defining a profile of the each geometric block, wherein the color of the each geometric block is a uniform color or a gradient color.

3. The calibration method of claim 1, wherein the first operation is a linear regression calculation.

4. The calibration method of claim 1, wherein the second operation is a linear regression calculation.

5. The calibration method of claim 1, wherein the each test pattern of the plurality of test patterns is located on a corresponding plane, and a different relative angle exists between the corresponding plane and the image capture device.

6. The calibration method of claim 1, wherein the each test pattern of the plurality of test patterns is generated by display patterns displayed on a plurality of stacked transparent display panels, wherein each transparent display panel of the plurality of transparent display panels is not perpendicular to a lens plane of the image capture device, and the plurality of transparent display panels are stacked not perpendicular to the lens plane of the image capture device.

7. The calibration method of claim 1, wherein the each test pattern of the plurality of test patterns is generated by a three-dimensional display panel.