Super resolution imaging sensor

• US 20110169953A1
• Filed: 01/14/2010
• Published: 07/14/2011
• Est. Priority Date: 01/14/2010
• Status: Abandoned Application

• Current Assignee: Trex Enterprises Corporation
• Original Assignee: Trex Enterprises Corporation
• Inventors: Sandler, David, Barrett, Todd, Belenkii, Mikhail
• Application Number:
  US12/657,187
• Publication Number:
  US 20110169953A1
• Time in Patent Office: Days
• US Class Current: 348/144
• CPC Class Codes: G06T 3/4053 based on super-resolution, i.e. the output image resolution being higher than the sensor resolution

Abstract

A system and process for converting a series of short-exposure, small-FOV zoom images to pristine, high-resolution images, of a face, license plate, or other targets of interest, within a fraction of a second. The invention takes advantage or the fact that some regions in a telescope field of view can be super-resolved; that is, features will appear in random regions which have resolution better than the diffraction limit of the telescope. This effect arises because the turbulent layer in the near-field of the object can act as a lens, focusing rays ordinarily outside the diffraction-limited cone into the distorted image. The physical effect often appears as magnified sub-regions of the image, as if one had held up a magnifying glass to a portion of the image. Applicants have experimentally shown these effects on short-range anisoplanatic imagery, along a horizontal path over the desert. In addition, they have developed powerful parallel processing software to overcome the warping and produce sharp images.

Claims

1. A process for converting a series of short-exposure, digital telescopic small-FOV zoom images to, high-resolution images within a fraction of a second, said process comprising:

A) recording a series of short exposure images of the field of view,

B) removing turbulence effects by real time processing of the series of images to improve the resolution of the images to approximately diffraction limited images,

C) further improving the images utilizing a screen comprised of Zernike polynomials to improve the resolution of the images.

2. The process as in claim 1 wherein the images are improved to approximately double diffraction limited resolution.

3. The process as in claim 1 wherein a turbulent layer in the near-field of the object can acts as a lens, focusing rays ordinarily outside the diffraction-limited cone into the distorted image.

4. The process as in claim 1 wherein the field of view is imaged with a telescope on a UAV through strong turbulence, to obtain super-resolved imagery, at 2×

the diffraction limit.

5. The process as in claim 4 wherein said telescope has an aperture of about D=30 cm and produces images that are equivalent in resolution to a telescope with D=60 cm looking through non-turbulent air.

6. An imaging system comprising:

A) a UAV

B) a telescopic system mounted on the UAV said telescopic system comprising;

a) a telescope defining an aperture adapted to rapidly image a field of view to produce a series of images at rates of at least ______ images per second

b) a computer processor adapted;

i) to process the images to improve resolution of the images to approximately diffraction limited resolution and

ii) to further process the images better than diffraction limited utilizing a screen comprised of Zernike polynomials.