Strobe system

• US 20070053677A1
• Filed: 09/07/2005
• Published: 03/08/2007
• Est. Priority Date: 09/07/2005
• Status: Abandoned Application

• Current Assignee: Point Grey Research Inc (Teledyne Technologies Incorporated)
• Original Assignee: Point Grey Research Inc (Teledyne Technologies Incorporated)
• Inventors: Steenburgh, Malcolm, Kingdon, Stewart, Gibbons, Michael, Barman, Roderick
• Application Number:
  US11/219,840
• Publication Number:
  US 20070053677A1
• Time in Patent Office: Days
• US Class Current: 396/155
• CPC Class Codes: G03B 15/05 Combinations of cameras with electronic flash apparatus; Electronic flash units
• CPC Class Codes: G03B 2215/05 Combinations of cameras with electronic flash units
• CPC Class Codes: G03B 2215/0557 Multiple units, e.g. slave-unit

Abstract

A camera has a strobe output. When the camera acquires a sequence of images, a strobe pattern control determines for each image whether or not to apply a strobe signal to the strobe output according to a predetermined pattern. The predetermined pattern and the length of the sequence can be user defined by way of a suitable software interface, for example. The strobe output may be used to control a device such as a flash unit, a sound recorder or the like.

Claims

1. A camera comprising:

a shutter;

a controller operable to trigger the shutter to acquire a sequence of images; and

,

a strobe pattern control configured to generate strobe signals at a strobe output, the strobe pattern control having access to a predetermined pattern comprising information specifying, for each image in the sequence of images at least one of;

whether or not to generate a strobe signal for that image; and

a type of strobe signal to generate for the image;

wherein the strobe pattern control is configured to generate strobe signals according to the predetermined pattern synchronously with triggering of the shutter by the controller.

2. A camera according to claim 1 wherein the strobe pattern control comprises a modulo-N counter and the sequence of images has a length of N images, where N is an integer.

3. A camera according to claim 2 comprising a control register containing a value, wherein the value in the control register determines a value of N.

4. A camera according to claim 1 wherein each of the images comprises image data and the controller is configured to associate with the image data for each of the images strobe information indicating at least one of:

whether a strobe signal was generated for the image; and

a type of strobe signal generated for the image.

5. A camera according to claim 4 wherein the controller is configured to store the strobe information for each of the images in association with the image data for the image.

6. A camera according to claim 4 wherein the controller is configured to write the strobe information for each of the images into the image data for the image.

7. A camera according to claim 1 wherein the strobe pattern control is configured to generate a strobe signal only for every N th image where N is an integer and N>

1.

8. A system comprising at least two cameras according to claim 1 wherein the cameras are configured to acquire images synchronously with one another, each of the cameras is configured to generate strobe signals at its strobe output according to a predetermined pattern, and the predetermined patterns are different for different ones of the cameras.

9. A system according to claim 8 wherein the at least two cameras include a first camera and a second camera and the predetermined pattern for the first camera causes the first camera to generate strobe signals only for images for which the second camera does not generate strobe signals.

10. A system according to claim 9 wherein the predetermined pattern for the second camera causes the second camera to generate strobe signals for all images for which the first camera does not generate strobe signals.

11. A method for acquiring a sequence of images, the method comprising:

providing a camera;

providing a predetermined pattern comprising information specifying, for each image in a sequence of images to be acquired, at least one of;

whether or not to generate a strobe signal for that image; and

a type of strobe signal to generate for the image; and

,

operating the camera to acquire the sequence of images while generating strobe signals according to the predetermined pattern.

12. A method according to claim 11 wherein the predetermined pattern comprises information specifying, for each image in the sequence of images to be acquired, whether or not to generate a strobe signal for that image.