Camera applications in a handheld device
A hand held device containing at least one camera can perform various functions. In some embodiments, digitized images taken with two or more camera lenses having different fixed focal lengths may be combined to emulate a high-resolution optical zoom, and may also permit the device to perform 3D applications. In other embodiments, a device containing a camera may perform as a bar code reader, and may wirelessly transmit and/or visually present a bar code to other devices. Movable optics may permit the same camera to focus on either distant objects or on a close-up bar code.
1. An apparatus for recording first and second visual images, comprising a handheld electronic device having a camera system, the camera system comprising:
a first lens with a fixed first field of view and a second lens with a fixed second field of view smaller than the first field of view;
at least one optical sensor to sense a first visual image provided by the first lens and to sense a second visual image provided by the second lens; and
an optical selection system to direct the first visual image to the optical sensor at a first time and to direct the second visual image to the optical sensor at a second time, the optical selection system comprising a component selected from a list consisting of:
(1) a movable reflective surface that can occupy first and second different positions, the reflective surface to cause the first visual image but not the second visual image to reach the image sensor when in the first position and to cause the second visual image but not the first visual image to reach the image sensor when in the second position; and
(2) a beam-combiner to direct both the first and second visual images to the image sensor without movement of the beam-combiner, and at least one light blocking device to prevent the first and second visual images from reaching the beam-combiner simultaneously;
wherein the device is to record the first visual image and the second visual image.
2. The apparatus of claim 1 , wherein:
the camera system comprises at least one optical component to change a focal length of one of the first and second lenses.
3. The apparatus of claim 1 , wherein the first and second lenses are physically separated by a particular distance.
4. A method of recording first and second visual images, comprising:
receiving a first visual image provided by a first lens of a camera having a fixed first field of view, wherein receiving the first visual image comprises sensing the first visual image with an optical sensor at a first time;
receiving a second visual image provided by a second lens of the camera having a fixed second field of view smaller than the first field of view, wherein the second visual image is a subset of the first visual image, wherein receiving the second visual image comprises sensing the second visual image with the optical sensor at a second time different than the first time; and
comparing the first and second stored visual images to determine motion occurring between the first and second times.
5. The method of claim 4 , wherein said receiving the first visual image comprises sensing the first visual image with a first optical sensor and said receiving the second visual image comprises sensing the second visual image with a second optical sensor.
6. The method of claim 4 , further comprising modifying the first stored visual image with texture information from the second stored visual image.
7. The method of claim 4 , further comprising using the first and second stored visual images to determine a distance between the camera and an object depicted in both the first and second visual images.
8. An article comprising a computer-readable storage medium that contains instructions, which when executed by one or more processors result in performing operations comprising:
receiving a first visual image provided by a first lens of a camera having a fixed first field of view, the operation of receiving the first visual image comprising sensing the first visual image at a first time; and
receiving a second visual image provided by a second lens of the camera having a fixed second field of view smaller than the first field of view, wherein the second visual image is a subset of the first visual image, the operation of receiving the second visual image comprising sensing the second visual image at a second time different than the first time; and
comparing the first and second stored visual images to determine motion occurring between the first and second times.
9. The article of claim 8 , wherein the operation of receiving the first visual image comprises sensing the first visual image with a first optical sensor and the operation of receiving the second visual image comprises sensing the second visual image with a second optical sensor.
10. The article of claim 8 , wherein the operations further comprise modifying the first stored visual image with texture information from the second stored visual image.
11. The article of claim 8 , wherein the operations further comprise using the first and second stored visual images to determine a distance between the camera and an object depicted in both the first and second visual images.
12. A method of recording first and second visual images, comprising:
receiving a first visual image provided by a first lens of a camera having a fixed first field of view;
receiving a second visual image provided by a second lens of the camera having a fixed second field of view smaller than the first field of view, wherein the second visual image is a subset of the first visual image; and
processing the first and second visual images together to produce a third visual image with an intermediate field of view between the first and second fields of view, and with a resolution for at least part of the third visual image that is better than the resolution of a corresponding part of the first visual image.
13. The method of claim 12 , further comprising modifying the first stored visual image with texture information from the second stored visual image.
14. The method of claim 12 , further comprising using the first and second stored visual images to determine a distance between the camera and an object depicted in both the first and second visual images.
15. A method of recording first and second visual images, comprising:
receiving a first visual image provided by a first lens of a camera having a fixed first field of view;
receiving a second visual image provided by a second lens of the camera having a fixed second field of view smaller than the first field of view, wherein the second visual image is a subset of the first visual image; and
performing a displacement correction on at least one of the first and second visual images to produce a coaxial alignment between the first and second visual images.
16. The method of claim 15 , further comprising modifying the first stored visual image with texture information from the second stored visual image.
17. The method of claim 15 , further comprising using the first and second stored visual images to determine a distance between the camera and an object depicted in both the first and second visual images.
18. An article comprising a computer-readable storage medium that contains instructions, which when executed by one or more processors result in performing operations comprising:
receiving a first visual image provided by a first lens of a camera having a fixed first field of view; and
receiving a second visual image provided by a second lens of the camera having a fixed second field of view smaller than the first field of view, wherein the second visual image is a subset of the first visual image; and
processing the first and second visual images together to produce a third image with an intermediate field of view between the first and second fields of view, and with a higher resolution for at least part of the third image than the resolution of a corresponding part of the first visual image.
19. The article of claim 18 , wherein the operations further comprise modifying the first stored visual image with texture information from the second stored visual image.
20. The article of claim 18 , wherein the operations further comprise using the first and second stored visual images to determine a distance between the camera and an object depicted in both the first and second visual images.
21. An article comprising a computer-readable storage medium that contains instructions, which when executed by one or more processors result in performing operations comprising:
receiving a first visual image provided by a first lens of a camera having a fixed first field of view; and
receiving a second visual image provided by a second lens of the camera having a fixed second field of view smaller than the first field of view, wherein the second visual image is a subset of the first visual image; and
performing a displacement correction on at least one of the first and second visual images to produce a coaxial alignment between the first and second visual images.
22. The article of claim 21 , wherein the operations further comprise modifying the first stored visual image with texture information from the second stored visual image.
23. The article of claim 21 , wherein the operations further comprise using the first and second stored visual images to determine a distance between the camera and an object depicted in both the first and second visual images.