Image acquiring device and method of correcting coordinates thereof

Patent metadata

Field	Value
Publication number	US-10388010-B2
Application number	US-201715745067-A
Country	US
Kind code	B2
Filing date	Dec 13, 2017
Priority date	May 15, 2017
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

The present application provides an image acquiring device and a method of correcting coordinates of the image acquiring device, wherein the method includes: detecting a coordinate of a defect detected in a process; initializing a position of a photographing device according to the coordinate of the defect detected in a preprocessing; then adjusting the position of the photographing device according to a position of the defect in the picture currently captured by the photographing device, so that the defect is located at the center of the picture currently captured by the photographing device; recording the coordinate of the defect at the center of the picture; and providing the coordinate of the defect at the center of the picture to a data management system.

First claim

What is claimed is:

1. A method of correcting coordinates of an image acquiring device, comprising:
acquiring a defect in a sample to be photographed detected in a preprocessing and a first coordinate of the defect;
initializing a position of a photographing device according to the first coordinate of the defect, and acquiring a picture currently captured by the photographing device;
if the defect in the picture currently captured by the photographing device is not located at the center of the picture, adjusting the position of the photographing device according to a position of the defect in the picture currently captured by the photographing device until the defect in the picture currently captured by the photographing device is located at the center of the currently captured picture;
if the defect in the picture currently captured by the photographing device is located at the center of the currently captured picture, photographing the defect and recording a current coordinate of the defect as a second coordinate; and
providing the second coordinate of the defect to a data management system, so that a subsequent processing locates the defect according to the second coordinate of the defect, and performs a corresponding operation to the defect.

2. The method of claim 1 , wherein the step of adjusting the position of the photographing device according to the position of the defect in the picture currently captured by the photographing device until the defect in the picture currently captured by the photographing device is located at the center of the currently captured picture comprises:
calculating a displacement information of the photographing device according to the position of the defect in the picture currently captured by the photographing device;
adjusting the position of the photographing device according to displacement information, and acquiring the picture currently captured by the photographing device after adjusting the position;
identifying the position of the defect in the picture currently captured by the photographing device after adjusting the position;
if the defect in the picture currently captured by the photographing device after adjusting the position is not located at the center of the picture, adjusting the position of the photographing device until the defect in the picture currently captured by the photographing device is located at the center of the currently captured picture;
if the defect in the picture currently captured by the photographing device after adjusting the position is located at the center of the picture, photographing the defect and recording the current coordinate of the defect as the second coordinate.

3. The method of claim 1 , wherein the step of providing the second coordinate of the defect to the data management system comprises:
updating the first coordinate of the defect in the sample to be photographed detected in the preprocessing as the second coordinate, and providing the second coordinate of the defect after being updated to the data management system.

4. The method of claim 1 , wherein the step of providing the second coordinate of the defect to the data management system comprises:
providing the second coordinate of the defect to the data management system, so that the data management system updates the first coordinate of the defect detected by the preprocessing as the second coordinate.

5. The method of claim 1 , wherein, after the step of photographing the defect and recording the current coordinate of the defect as the second coordinate if the defect in the picture currently captured by the photographing device after adjusting the position is located at the center of the picture, the method further comprises:
calculating a coordinate offset according to the second coordinate of the defect and the first coordinate of the defect detected by the preprocessing, so that if photographing a defect in another position of the sample to be photographed, the position of the photographing device is initialized according to the first coordinate of the defect at the another position and the coordinate offset.

6. The method of claim 5 , wherein after the step of initializing the position of the photographing device according to the first coordinate of the defect at the another positions and the coordinate offset, the method further comprises:
setting the calculated coordinate offset as the coordinate offset of the defect in the image acquiring device and the defect detected in the sample to be photographed, and of a preprocessing machine of the first coordinate of the defect, so that the second coordinates of all defects in the sample to be photographed within the same preprocessing machine is acquired according to the coordinate offset.

7. The method of claim 1 , wherein after the step of initializing the position of the photographing device according to the first coordinate of the defect, and acquiring the picture currently captured by the photographing device, the method further comprises:
photographing the defect if the defect in the picture currently captured by the photographing device is located at the center of the picture.

8. The method of claim 1 , wherein after the step of initializing the position of the photographing device according to the first coordinate of the defect, and acquiring the picture currently captured by the photographing device, the method further comprises:
moving a preset distance according to current coordinate of the photographing device, if no defect is located in the picture currently captured by the photographing device; and
if the defect appears in a visual field of the photographing device after the photographing device moving the preset distance in any one direction, adjusting the position of the photographing device according to the position of the defect in the picture currently captured by the photographing device.

9. The method of claim 8 , wherein the step of moving the preset distance according to the current coordinate of the photographing device comprises:
moving up, down, left, and right in sequence for the preset distance according to the current coordinate of the photographing device.

10. A method of correcting coordinates of an image acquiring device, comprising:
acquiring a defect in a sample to be photographed detected in a preprocessing and a first coordinate of the defect;
initializing a position of a photographing device according to the first coordinate of the defect, and acquiring a picture currently captured by the photographing device;
if the defect in the picture currently captured by the photographing device is not located at the center of the picture, adjusting the position of the photographing device according to a position of the defect in the picture currently captured by the photographing device until the defect in the picture currently captured by the photographing device is located at the center of the currently captured picture;
if the defect in the picture currently captured by the photographing device is located at the center of the currently captured picture, photographing the defect and recording a current coordinate of the defect as a second coordinate; and
providing the second coordinate of the defect to a data management system, so that a subsequent processing locates the defect according to the second coordinate of the defect, and performs a corresponding operation to the defect.
calculating a coordinate offset according to the second coordinate of the defect and the first coordinate of the defect detected by the preprocessing, so that if photographing a defect in another positions of the sample to be photographed, the position of the photographing device is initialized

Assignees

• Hkc Corp Ltd
• Chongqing Hkc Optoelectronics Tech Co Ltd
• Chongqing Optoelectronics Tech Co Ltd

Inventors

• Feng Hu

Classifications

• H04N23/695

  Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects · CPC title

• H04N23/61 Primary

  based on recognised objects · CPC title

• H04N23/80 Primary

  Camera processing pipelines; Components thereof · CPC title

• G09G3/006

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G06T7/0008

  checking presence/absence · CPC title