Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2018226437) SHUTTERLESS FAR INFRARED (FIR) CAMERA FOR AUTOMOTIVE SAFETY AND DRIVING SYSTEMS
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS

What is claimed is:

1 . A shutterless far-infrared (FIR) camera for advanced driver assistance systems, comprising:

at least one optical unit including at least one lens;

an FIR sensor coupled to the optical unit and configured to capture FIR images; and

an integrated circuit (IC) configured to process the captured FIR images to output an enhanced thermal video stream, wherein the IC further comprises:

a processing circuitry; and

a memory containing instructions that, when executed by the processing circuitry, configure the processing circuitry to:

perform image corrections including at least a shutterless correction.

2. The shutterless FIR camera of claim 1 , wherein the IC is further configured to output a first output thermal video stream to a computer.

3. The shutterless FIR camera of claim 2, wherein the IC is further configured to output a second output thermal video stream to a display.

4. The shutterless FIR camera of claim 1 , wherein the FIR camera further comprises: a plurality of image sensors coupled to the IC.

5. The shutterless FIR camera of claim 4, wherein at least one of the plurality of image sensors is an FIR sensor.

6. The shutterless FIR camera of claim 4, wherein the IC is further configured to output a thermal video stream that is an image fusion of the plurality of image sensors.

7. The shutterless FIR camera of claim 1 , wherein the FIR sensor and the IC are encapsulated within a thermal core.

8. The shutterless FIR camera of claim 1 , wherein the IC is further configured to: retrieve predetermined calibration tables;

apply a shutterless pixel-based correction to the FIR images based on the predetermined calibration tables; and

apply a shutterless scene-based noise correction to the FIR images.

9. The shutterless FIR camera of claim 8, wherein the calibration tables include at least a gain and an offset value calculated based on two temperature points for overcoming gain and offset irregularities in the FIR sensor and unifying the FIR sensor's response to infrared (IR) radiation for a range of ambient temperatures.

10. The shutterless FIR camera of claim 9, wherein the IC is further configured to: retrieve a subset of calibration values from the calibration tables, wherein the subset of calibration values is of a specific temperature range determined based on a current measured temperature.

1 1 . The shutterless FIR camera of claim 8, wherein the calibration tables include a drift value determined for each pixel at each temperature point during a calibration process of the FIR sensor.

12. The shutterless FIR camera of claim 1 , further comprising:

an image enhancing processor (IEP);

wherein the IEP is further configured to apply correction processes on the captured FIR images, wherein the correction processes are applied in a pipe-line fashion.

13. The shutterless FIR camera of claim 12, wherein a correction process of the correction processes includes: using a bilateral filter to preserve edges to reduce noise within the captured FIR images.

14. The shutterless FIR camera of claim 12, wherein a correction process of the correction processes includes: applying an automatic gain to reduce a distance between a lowest and a highest gray level within the FIR images, thereby stretching an image histogram of the FIR images.

15. The shutterless FIR camera of claim 12, wherein a correction process of the correction processes includes: applying a contrast limited adaptive histogram equalization (CLAHE) by dividing the FIR images into overlapping blocks and applying a histogram equalization within each individual block.

16. The shutterless FIR camera of claim 10, wherein a correction process of the correction processes includes: a polarity-and-brightness module configured to perform at least one of: changing white-hot pixels for black-hot pixels and adjusting the brightness of the FIR images by a predefined offset.

17. The shutterless FIR camera of claim 1 , wherein the enhanced thermal video stream is configured to detect objects in advanced driver assistance systems.

18. The shutterless FIR camera of claim 17, wherein the objects include at least one of: vehicles, pedestrians, animals, two-wheelers, black-ice spots, litter, debris, potholes, gully covers, and curbs.

19. The shutterless FIR camera of claim of claim 1 , wherein the advanced driver assistance systems include autonomous vehicles systems.

20. An electronic circuit integrated in a shutterless far-infrared (FIR) camera and configured to process FIR images, comprising:

a processing circuitry; and

a memory containing instructions that, when executed by the processing circuitry, configure the processing circuitry to:

perform image corrections, including at least a shutterless correction on the FIR images to output an enhanced thermal video stream.

21 . The electronic circuit of claim 20, wherein the electronic circuit and an FIR camera are integrated in advanced driver assistance systems.

22. The electronic circuit of claim 20, wherein the processing circuitry is further configured to:

retrieve predetermined calibration tables;

apply a shutterless pixel-based correction to the FIR images based on the predetermined calibration tables; and

apply a shutterless scene-based noise correction to the FIR images.

23. The electronic circuit of claim 22, wherein the calibration tables include at least a gain and an offset value calculated based on two temperature points for overcoming gain and offset irregularities in an FIR sensor and unifying the FIR sensor's response to infrared (IR) radiation for a range of ambient temperatures.

24. The electronic circuit of claim 22, wherein the processing circuitry is further configured to:

retrieve a subset of calibration value from the calibration tables, wherein the subset of calibration values is of a specific temperature range determined based on a current measured temperature.

25. The electronic circuit of claim 22, wherein the calibration tables include a drift value determined for each pixel at each temperature point during a calibration process of an FIR sensor.

26. The electronic circuit of claim 20, further comprising:

an image enhancing processor (IEP);

wherein the IEP is further configured to apply correction processes on the captured FIR images, wherein the correction processes are captured in a pipe-line fashion.

27. The electronic circuit of claim 26, wherein a correction process of the correction processes includes: using a bilateral filter to preserve edges to reduce noise within the captured FIR images.

28. The electronic circuit of claim 26, wherein a correction process of the correction processes includes: applying an automatic gain to reduce a distance between a lowest and a highest gray level within the FIR images, thereby stretching an image histogram of the FIR images.

29. The electronic circuit of claim 26, wherein a correction process of the correction processes includes: applying a contrast limited adaptive histogram equalization (CLAHE) by dividing the FIR images into overlapping blocks and applying a histogram equalization within each individual block.

30. The electronic circuit of claim 26, wherein a correction process of the correction processes includes: a polarity-and-brightness module configured to perform at least one of: changing white-hot pixels for black-hot pixels and adjusting the brightness of the FIR images by a predefined offset.