Device, system, and method of rapid image acquisition

• US 8,502,870 B2
• Filed: 01/30/2006
• Issued: 08/06/2013
• Est. Priority Date: 02/02/2005
• Status: Expired due to Fees

• Current Assignee: Pima Electronic Systems Ltd.
• Original Assignee: Pima Electronic Systems Ltd.
• Inventors: Bentkovski, Yakov
• Primary Examiner(s): SENFI, BEHROOZ M
• Application Number:
  US11/341,437
• Publication Number:
  US 20060170787A1
• Time in Patent Office: 2,745 Days
• Field of Search: 348/149, 348/148, 348/143, 348/159, 348/161, 348/169, 348/170, 348/171, 348/172, 348/371, 348/155, 382/107, 382/48, 382/103, 382/104, 382/105
• US Class Current: 348/155
• CPC Class Codes: H04N 23/71 Circuitry for evaluating the brightness variation
• CPC Class Codes: H04N 23/74 by influencing the scene brightness using illuminating means

Abstract

Device, system, and method of rapid image acquisition. For example, a device includes: an imager able to acquire one or more images; a light detector to detect, in response to a triggering event, a light level corresponding to at least a portion of a field-of-view of the imager; a controller to determine based on the detected light level one or more configurational values of the imager, to transfer the determined configurational values to the imager, and to command the imager to rapidly acquire one or more images utilizing the determined configurational values; and a triggering unit to perform an activation process of the apparatus.

Claims

1. An apparatus comprising:

a digital imager able to acquire one or more images;

a light detector to detect, without imaging, in response to a triggering event, a light level corresponding to at least a portion of a field-of-view of the digital imager;

a controller operative to at least partly determine, based on the detected light level and a pre-programmed algorithm and without imaging, one or more configurational values of the digital imager, to transfer the determined configurational values to the digital imager, and to command the digital imager to rapidly, once turned on by a turning-on process, acquire one or more images utilizing the determined configurational values; and

a triggering unit to perform said turning-on process of the digital imager.

2. The apparatus of claim 1, wherein said light detector is configured to be operable independently of an operational state of said imager.

3. The apparatus of claim 1, wherein the controller is operative to read the one or more configurational values from a lookup table storing a plurality of values of configurational parameters corresponding, respectively, to a plurality of values of light levels.

4. The apparatus of claim 1, wherein the controller is operative to pre-compute the one or more configurational values using a calibration function that takes into account the detected light level.

5. The apparatus of claim 1, wherein the light detector detects the light level based on an analysis of a plurality of light measurements.

6. The apparatus of claim 1, further comprising:

an illumination unit to illuminate at least a portion of the field-of-view of the digital imager during rapid image acquisition by the digital imager.

7. The apparatus of claim 1, wherein the digital imager is in non-operational mode prior to the triggering event and in image acquisition mode subsequent to the triggering event.

18. The apparatus of claim 1 wherein the digital imager is operative to acquire an image utilizing the determined configurational values within less than a second.

19. The apparatus of claim 18 wherein the digital imager is operative to acquire an image utilizing the determined configurational values within 300 milliseconds.

21. The apparatus of claim 1 wherein the digital imager acquires a plurality of images utilizing said configurational values.

22. The apparatus of claim 1 wherein said triggering event is generated by said triggering unit.

23. The apparatus of claim 1 wherein said configurational values comprise at least one temporal configurational value.

24. The apparatus of claim 1 wherein said configurational values comprise at least one gain value.

25. The apparatus of claim 1, wherein said configurational values comprise at least one color characteristic.

26. The apparatus of claim 23, wherein said temporal configurational value includes at least one of:

length of time of exposure period; and

frame capture rate.

27. The apparatus of claim 24, wherein said gain value includes at least one of an analog gain value and a digital gain value.

28. The apparatus of claim 25, wherein said color characteristic includes at least one of:

a brightness level, a contrast level, a saturation level, a hue level, and a gamma level.

31. The apparatus of claim 1, wherein said controller at least partly determines said values while the digital imager is not capturing.

32. The apparatus of claim 1, wherein said controller entirely determines said values while the digital imager is not capturing.

8. A system comprising:

a detector operative for detecting, in response to a triggering event, a light level corresponding to at least a portion of a field-of-view of a digital imager;

an imager pre-configurer operative for at least partly pre-determining, based on the detected light level, and a pre-programmed algorithm and without imaging, one or more configurational values of the digital imager; and

for commanding the digital imager to acquire one or more images utilizing said configurational values rather than utilizing configurational values generated by performing a digital imager calibration process initiated only after the digital imager is turned on.

9. The system of claim 8, wherein said light detector is configured to be operable independently of an operational state of said imager.

10. The system of claim 8, further comprising:

a control unit operatively connected to the apparatus, the control unit able to arm and disarm the apparatus in response to a received command.

11. The system of claim 8, wherein the apparatus further comprises:

a transmitter to transmit one or more images rapidly acquired by the digital imager to an external receiver.

20. A system according to claim 8 wherein the imager pre-configurer at least partly pre-determines at least one configurational value while the digital imager is not capturing and wherein the digital imager'"'"'s utilization of the pre-determined configurational values rather than relying on configurational values generated only after the digital imager is turned on allows the digital imager to acquire a first image within a second of being turned on.

29. A system according to claim 20, wherein the imager pre-configurer pre-determines at least one configurational value while the digital imager is turned off.

30. A system according to claim 20, wherein the imager pre-configurer pre-determines at least one configurational value while the digital imager is in stand-by mode.

12. A method comprising:

detecting, in response to a triggering event, a light level corresponding to at least a portion of a field-of-view of a digital imager;

determining, based on the detected light level and a pre-programmed algorithm and without imaging, one or more configurational values of the digital imager; and

commanding the digital imager to acquire one or more images utilizing the determined configurational values while avoiding a digital imager calibration process.

13. The method of claim 12, wherein said detecting a light level is performed without operating said imager.

14. The method of claim 12, wherein determining comprises:

reading the one or more configurational values from a lookup table storing a plurality of values of configurational parameters corresponding, respectively, to a plurality of values of light levels.

15. The method of claim 12, wherein determining comprises:

computing the one or more configurational values using a pre-stored calibration function that takes into account the detected light level, thereby to avoid having to calibrate said configurational values after said imager is turned on with consequent undesirable delay in acquisition of said images.

16. A method of acquiring an image comprising:

detecting a light level corresponding to at least a portion of a field-of-view of a digital imager;

determining, based at least on the detected light level and a pre-programmed algorithm and without imaging, one or more configurational values for the digital imager;

altering a state of the digital imager to an operational mode after said steps of detecting and determining; and

operating the digital imager to acquire one or more images utilizing the determined configurational values.

17. A method according to claim 16 wherein said detecting occurs in response to a triggering event.

33. A method comprising:

providing a detector operative for detecting, in response to a triggering event, a light level corresponding to at least a portion of a field-of-view of a digital imager;

providing a digital imager pre-configurer operative for at least partly pre-determining, based on the detected light level and a pre-programmed algorithm and without imaging, one or more configurational values of the digital imager; and

for commanding the digital imager to acquire one or more images utilizing said configurational values rather than utilizing configurational values generated by performing a digital imager calibration process initiated only after the digital imager is turned on.