Electronic device for correcting dark images in real time

Patent metadata

Field	Value
Publication number	US-10878547-B2
Application number	US-201916359676-A
Country	US
Kind code	B2
Filing date	Mar 20, 2019
Priority date	Mar 20, 2018
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

Provided is an electronic device including an emission circuit configured to emit a first X-ray based on a clock in a second period when the period of the clock is changed from a first period to a second period and a processing circuit configured to output a first image data value based on a second X-ray received corresponding to the first X-ray or update a correction data value used to correct a first image data value, based on a control signal synchronized with the clock based on the first period.

First claim

What is claimed is:

1. An electronic device comprising:
an emission circuit configured to emit a first X-ray based on a clock signal in a second period, when the period of the clock signal is changed from a first period to the second period; and
a processing circuit configured to determine whether to output a first image data value when a second X-ray that is a reflection of the first X-ray off an object is received, or to update a correction data value, based on a control signal synchronized with the clock signal based on the first period, the correction data value being used to correct the first image data value,
wherein the processing circuit is configured to update the correction data value for the dark images that vary in real time.

2. The electronic device of claim 1 , wherein the first image data value is related to an intensity of the second X-ray.

3. The electronic device of claim 1 , wherein when the control signal has a first logic value, the processing circuit is further configured to update the correction data value based further on a second image data value generated based on the second X-ray.

4. The electronic device of claim 3 , wherein when the control signal has a second logic value, the processing circuit is further configured to output the first image data based further on the second image data value and the correction data value.

5. The electronic device of claim 4 , wherein the updated correction data value corresponds to an average value calculated based on the correction data value and the second image data value.

6. The electronic device of claim 1 , further comprising a detection circuit including a pixel configured to receive the second X-ray.

7. The electronic device of claim 6 , wherein the correction data value is related to a noise generated by the detection circuit.

8. The electronic device of claim 1 , wherein the first image data value is related to an image of the object.

9. An electronic device comprising:
an emission circuit configured to emit a first X-ray based on a clock signal having a second period changed from a first period;
a detection circuit configured to generate a first image data value based on a second X-ray that is a reflection of the first X-ray off of an object, and to generate a second image data value based on a noise; and
a processing circuit configured to calculate a third image data value based on the first image data value and a first correction data value, or to calculate a second correction data value based on the second image data value and the first correction data value, according to whether the clock signal having the second period comprises a pulse during the first period, the third image data value being related to an image of an object, the first correction data value and the second correction data value being related to the noise,
wherein the processing circuit is configured to update the correction data value for the dark images that vary in real time.

10. The electronic device of claim 9 , wherein the detection circuit is further configured to generate a fourth image data value based on the second X-ray after the first image data is generated,
wherein the processing circuit is further configured to calculate a fifth image data value based on the fourth image data value and the second correction data value, according to whether the clock signal comprises the pulse during the first period, the fifth image data value being related to the image of the object.

11. The electronic device of claim 9 , wherein the noise is related to a dark image generated by the detection circuit.

12. The electronic device of claim 9 , wherein the image processing circuit is further configured to generate a control signal in synchronization with the clock signal to indicate one of a first logic value or a second logic value in each of the first periods.

13. The electronic device of claim 12 , wherein the image processing circuit is further configured to calculate the third image data based further on the first logic value of the control signal.

14. The electronic device of claim 13 , wherein the image processing circuit is further configured to calculate the second correction data value based further on the second logic value of the control signal.

15. An electronic device comprising:
a detection circuit configured to generate a first image data value based on a received second X-ray that is a reflection of a first X-ray outputted based on a clock signal that changes from a first period to a second period; and
a processing circuit configured to:
generate a control signal related to reception of the second X-ray based on the clock signal,
calculate a second image data value related to an image of an object, based on the first image data value and a first correction data value in response to a first logic value of the control signal, and
calculate a second correction data value related to a noise based on the first image data value and the first correction data value in response to a second logic value of the control signal,
wherein the processing circuit is configured to update the correction data value for the dark images that vary in real time.

16. The electronic device of claim 15 , wherein the first correction data value is calculated based on a third image data value, generated by the detection circuit based on the noise before the first image data value is generated.

17. The electronic device of claim 15 , wherein the second correction data value is an average value calculated based on the first correction data value and the first image data value.

18. The electronic device of claim 15 , wherein the control signal has the first logic value in correspondence to the second X-ray received by the detection circuit.

19. The electronic device of claim 15 , wherein the control signal has the first logic value in correspondence to the first X-ray outputted based on the clock signal.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Park Sora
• Song Yoon-Ho
• Lee Jeong Woong

Classifications

• G01N23/04

  and forming images of the material · CPC title

• G01N2223/304

  electric circuits, signal processing · CPC title

• G06T5/50 Primary

  using two or more images, e.g. averaging or subtraction · CPC title

• G06T2207/10116

  X-ray image · CPC title

• G01N2223/401

  image processing · CPC title