Granted Patent B2

US 9,536,165 · App. 13/472,032 · Granted Jan 3, 2017

Abstract

Claims (61)

1. A method for characterizing a functionality of a flash from at least one image captured with a camera using the flash, said method comprising:

analyzing the image, said analyzing of the image comprising:

segmenting the image into at least one sub-region; and

applying a metric to the sub-region to measure an image property within the sub-region; and

determining an operational condition of the flash in response to a result of the applied metric, said operational condition being either one of (a) a first operational condition in which the flash is functional enough to provide a sufficient amount of illumination therefrom or (b) a second operational condition in which the flash is degraded enough to not provide a sufficient amount of illumination therefrom.

2. The method of claim 1 , said method further comprising:

determining if said image was captured in a low ambient light condition, and based thereon either executing or not executing said analyzing.

3. The method of claim 1 , wherein the metric obtains a standard deviation of pixel values within the sub-region.

4. The method of claim 1 , wherein the sub-region is predefined.

5. The method of claim 1 , said method further comprising:

detecting at least one cue in the image; and

defining the sub-region dynamically based on said cue.

6. The method of claim 1 , said method further comprising:

analyzing a plurality of images captured using said flash over a period of time, and based on said analysis forecasting how functional the flash will be at some future point in time.

7. An apparatus that executes the method of claim 1 .

8. A non-transitory machine-readable medium including a computer program which when executed performs the method of claim 1 .

9. A method for characterizing a functionality of a flash from at least one image captured with a camera using the flash, said method comprising:

analyzing the image, said analyzing of the image comprising:

segmenting the image into at least one sub-region; and

applying a metric to the sub-region to measure an image property within the sub-region; and

determining how functional the flash is, in response to a result of the applied metric;

wherein said method further comprises:

determining if said image was captured in a low ambient light condition, and based thereon either executing or not executing said analyzing; and

wherein determining if said image was captured in a low ambient light condition comprises:

measuring a darkness of the image in at least one periphery region of the image.

10. The method of claim 9 , wherein the image is deemed to have been captured in a low ambient light condition, if the measured darkness in the periphery region of the image exceeds a set level.

11. A method for characterizing a functionality of a flash from at least one image captured with a camera using the flash, said method comprising:

analyzing the image, said analyzing of the image comprising:

segmenting the image into at least one sub-region; and

applying a metric to the sub-region to measure an image property within the sub-region; and

determining how functional the flash is, in response to a result of the applied metric;

wherein said metric measures at least one of a contrast or a color richness of the image within the sub-region.

12. The method of claim 11 , wherein if the result of said metric at least one of meets or exceeds a threshold level, then the flash is deemed to be suitably functional.

13. The method of claim 11 , wherein if the result of said metric does not at least one of meet or exceed a threshold level, then the flash is deemed to not be suitably functional.

14. The method of claim 13 , said method further comprising:

providing a notification if the flash is deemed to not be suitably functional.

15. A method for characterizing a functionality of a flash from at least one image captured with a camera using the flash, said method comprising:

analyzing the image, said analyzing of the image comprising:

segmenting the image into at least one sub-region; and

applying a metric to the sub-region to measure an image property within the sub-region; and

determining how functional the flash is, in response to a result of the applied metric;

wherein the captured image is a color image, and the method further includes converting at least the sub-region of the image from color to monochrome.

16. A camera system comprising:

at least one flash;

a camera that obtains at least one image using said flash; and

an image processor that analyzes said image to determine an operational condition of said flash, wherein said analyzing includes:

segmenting the image into at least one sub-region; and

applying a metric to the sub-region to measure an image property within the sub-region;

wherein, in response to the measured image property, said operational condition is determined to be either one of (a) a first operational condition in which the flash is functional enough to provide a sufficient amount of illumination therefrom or (b) a second operational condition in which the flash is degraded enough to not provide a sufficient amount of illumination therefrom.

17. The camera system of claim 16 , wherein said image processor further:

detects at least one cue in the image; and

defines the sub-region dynamically based on said cue.

18. A camera system comprising:

at least one flash;

a camera that obtains at least one image using said flash; and

an image processor that analyzes said image to determine how functional said flash is, wherein said analyzing includes:

segmenting the image into at least one sub-region; and

applying a metric to the sub-region to measure an image property within the sub-region;

wherein said metric measures at least one of a contrast or a color richness of the image within the sub-region.

19. The camera system of claim 18 , wherein if a result of said metric at least one of meets or exceeds a threshold level, then the flash is deemed by the image processor to be suitably functional.

20. The camera system of claim 18 , wherein the image processor provides a notification if the flash is not deemed to be suitably functional.

Assignments (10)