Display panel defect enhancement

1. A computer-implemented method comprising:

obtaining, by one or more processing units, a plurality of proposed regions from a plurality of images taken for a display panel;

determining at least two proposed regions of the plurality of proposed regions from the plurality of images includes an inconspicuous suspected defect on the display panel, wherein an inconspicuous suspected defect is a shallow scratch based on:

at least two of the proposed regions refer to a same area of the display panel that have matching coordinates, and

each of the at least two of the proposed regions has a confidence degree between the first threshold and the second threshold, wherein the second threshold is larger than the first threshold; and

confirming the inconspicuous suspected defect on the display panel as an actual defect by enhancing the suspected defect using at least two proposed regions from the plurality of proposed region, wherein enhancing the inconspicuous suspected defect comprises superimposing images taken at different time slots that depict at least two proposed regions against different background colors.

2. The method of claim 1 , wherein the at least two proposed regions referring to the same area of the display panel have similar coordinates on at least one corresponding point.

3. The method of claim 2 , wherein the at least two proposed regions referring to the same area of the display panel have similar size.

4. The method of claim 1 , wherein the images are taken with different colors of backgrounds shown on the display panel.

5. The method of claim 1 , wherein the images are taken with same color of backgrounds shown in different time slots on the display panel.

6. The method of claim 1 , further comprising:

reducing an amount of false detection of a defect caused by noises from the plurality of images taken for a display panel by superimposing images of respective regions with same background colors taken at different times.

7. The method of claim 1 , further comprising:

selectively omitting a region to be superimposed based on a confidence degree associated with the region as being inconspicuous under a certain color background.

8. A computer system comprising:

one or more processors;

a memory coupled to at least one of the processors; and

a set of computer program instructions stored in the memory and executed by at least one of the processors to perform a method comprising:

obtaining, by one or more processing units, a plurality of proposed regions from a plurality of images taken for a display panel;

determining at least two proposed regions of the plurality of proposed regions from the plurality of images includes an inconspicuous suspected defect on the display panel, wherein an inconspicuous suspected defect is a shallow scratch based on:

at least two of the proposed regions refer to a same area of the display panel that have matching coordinates, and

each of the at least two of the proposed regions has a confidence degree between the first threshold and the second threshold, wherein the second threshold is larger than the first threshold; and

confirming the inconspicuous suspected defect on the display panel as an actual defect by enhancing the suspected defect using at least two proposed regions from the plurality of proposed region, wherein enhancing the inconspicuous suspected defect comprises superimposing images taken at different time slots that depict at least two proposed regions against different background colors.

9. The computer system of claim 8 , wherein the at least two proposed regions referring to the same area of the display panel have similar coordinates on at least one corresponding point.

10. The computer system of claim 9 , wherein the at least two proposed regions referring to the same area of the display panel have similar size.

11. The computer system of claim 8 , wherein the images are taken with different colors of backgrounds shown on the display panel.

12. The computer system of claim 8 , wherein the images are taken with same color of backgrounds shown in different time slots on the display panel.

13. A computer program product comprising:

a computer readable storage medium having program instructions embodied therewith, the program instructions being executable by a computer to cause the computer to perform a method comprising:

obtaining, by one or more processing units, a plurality of proposed regions from a plurality of images taken for a display panel;

determining at least two proposed regions of the plurality of proposed regions from the plurality of images includes an inconspicuous suspected defect on the display panel, wherein an inconspicuous suspected defect is a shallow scratch based on:

at least two of the proposed regions refer to a same area of the display panel that have matching coordinates, and

each of the at least two of the proposed regions has a confidence degree between the first threshold and the second threshold, wherein the second threshold is larger than the first threshold; and

confirming the inconspicuous suspected defect on the display panel as an actual defect by enhancing the suspected defect using at least two proposed regions from the plurality of proposed region, wherein enhancing the inconspicuous suspected defect comprises superimposing images taken at different time slots that depict at least two proposed regions against different background colors.

14. The computer program product of claim 13 , wherein the at least two proposed regions referring to the same area of the display panel have similar coordinates on at least one corresponding point.