SYSTEMS AND METHODS FOR IMAGE RESOLUTION ENHANCEMENT

• US 20070083114A1
• Filed: 08/25/2006
• Published: 04/12/2007
• Est. Priority Date: 08/26/2005
• Status: Abandoned Application

• Current Assignee: University of Connecticut (State of Connecticut)
• Original Assignee: University of Connecticut (State of Connecticut)
• Inventors: Fox, Martin, Yang, Zhi, Analoui, Mostafa, Tuthill, Theresa, Raunig, David
• Application Number:
  US11/467,416
• Publication Number:
  US 20070083114A1
• Time in Patent Office: Days
• US Class Current: 600/437
• CPC Class Codes: A61B 8/00 Diagnosis using ultrasonic, sonic or infrasonic waves imaging of objects using sonar G01S15/00
• CPC Class Codes: G06T 2207/10136 3D ultrasound image
• CPC Class Codes: G06T 2207/20221 Image fusion; Image merging
• CPC Class Codes: G06T 2207/30004 Biomedical image processing
• CPC Class Codes: G06T 3/4053 based on super-resolution, i.e. the output image resolution being higher than the sensor resolution
• CPC Class Codes: G06T 5/50 using two or more images, e.g. averaging or subtraction

Abstract

A system for providing enhanced digital images includes an image receiving device for accepting at least one digital image and obtaining digital information therefrom; a computer program product comprising machine readable instructions stored on machine readable media, the instructions for providing enhanced digital images by performing upon the at least one digital image at least one of: a minimum directional derivative search, a multi-channel median boosted anisotropic diffusion, an non-homogeneous anisotropic diffusion technique and a pixel compounding technique.

Claims

1. A system for providing enhanced digital images, the system comprising:

an image receiving device for accepting at least one digital image and obtaining digital information therefrom;

a computer program product comprising machine readable instructions stored on machine readable media, the instructions for providing enhanced digital images by performing upon the at least one digital image at least one of;

a minimum directional derivative search, a multi-channel median boosted anisotropic diffusion technique, an non-homogeneous anisotropic diffusion super-resolution technique and a pixel compounding technique.

2. The system as in claim 1, wherein the at least one digital image comprises a digital image produced by an ultrasound imaging device.

3. The system as in claim 1, wherein the at least one digital image comprises a digital image produced by at least one of an infrared imaging device, a microwave imaging device, an impedance imaging device, an optical imaging device, a microscopic imaging device, a fluorescent imaging device, a computed tomography (CT) device, a magnetic resonant imaging (MRI) device, a nuclear magnetic resonance (NMR) device and a positron emission tomography (PET) device.

4. The system as in claim 1, wherein the at least one digital image comprises a digital image produced by at least one of a charge-coupled-devices (CCD), complimentary metal oxide semiconductor (CMOS) device, an infrared sensor, an ultraviolet sensor, a gamma camera, a digital camera, a video camera, a moving image capture device, and a system for translating an analog image to a digital image.

5. The system as in claim 1, wherein the at least one digital image comprises a digital image collected using at least one of a wavelength of light, a sound wave, an ultrasonic wave, an X-ray, a form of electromagnetic energy and a form of mechanical energy.

6. The system as in claim 1, comprising at least one of a processor, a memory, a storage, a display, an interface system and a network interface.

7. The system as in claim 1, wherein the at least one digital image comprises medical image information.

8. The system as in claim 1, wherein the at least one digital image is of a carotid artery.

9. The system as in claim 1, wherein the at least one digital image comprises at least one of photographic, microscopic, analytical, biological, medical, meteorological, oceanographic, forensic, military, professional, amateur, aerial, environmental, atmospheric, and subterranean information.

10. The system as in claim 1, wherein when at least two digital images are used, each digital image comprises information substantially similar to information in each of the other digital images.

11. The system as in claim 1, wherein instructions for performing the minimum directional derivative search comprise instructions for:

receiving the at least one digital image;

providing a plurality of directional cancellation masks for examining the image;

using the plurality of masks, obtaining directional derivatives for features within the image; and

filtering data from the digital image according to the directional derivatives to provide an enhanced digital image.

12. The system as in claim 1, wherein instructions for performing the multi-channel median boosted anisotropic diffusion comprise instructions for:

receiving the at least one digital image;

applying median filtering to data from the digital image to provide filtered data;

applying median boosting to the filtered data to provide boosted data;

applying image decimation and multi-channel processing to the boosted data to provide processed data;

comparing the processed data to a threshold criteria.

13. The system as in claim 12, further comprising:

one of terminating at least one of the filtering, boosting and processing to provide an enhanced digital image and repeating at least one of the filtering, boosting and processing to one of further filter, boost and decimate the digital image.

14. The system as in claim 1, wherein instructions for performing the non-homogeneous anisotropic diffusion technique comprise instructions for:

receiving a sequence of digital images;

performing deconvolution of the images with a suitable point spread function (PSF); and

processing the deconvoluted images with an anisotropic diffusion super-resolution reconstruction (ADSR) technique.

15. The system as in claim 1, wherein instructions for performing the pixel compounding technique comprise instructions for:

receiving a sequence of digital images;

applying homomorphic transformation to estimate a point spread function (PSF) for a system producing the sequence;

deblurring each image in the sequence to provide restored images;

registering the restored images; and

processing the restored images with an anisotropic diffusion super-resolution reconstruction (ADSR) technique.

16. A method for enhancing the resolution of digital images, the method comprising:

obtaining a sequence of digital images of an object of interest;

performing deconvolution of the images with a suitable point spread function (PSF); and

processing the deconvoluted images with an anisotropic diffusion super-resolution reconstruction (ADSR) technique.

17. The method as in claim 16, wherein the anisotropic diffusion super-resolution reconstruction (ADSR) technique provides for enhancing edge information and smoothing noise in an image.

18. The method as in claim 16, further comprising determining a threshold criteria for stopping the processing.

19. The method as in claim 18, wherein determining the threshold criteria comprises calculating a mean square difference between a result for a previous iteration and a current iteration.

20. A method for enhancing the resolution of digital images, the method comprising:

obtaining a sequence of digital images of an object of interest;

applying homomorphic transformation to estimate a point spread function (PSF) for a system producing the digital images;

deblurring each image in the sequence to provide restored images;

registering the restored images; and

processing the restored images with an anisotropic diffusion super-resolution reconstruction (ADSR) technique to provide images having enhanced resolution.

21. The method as in claim 20, further comprising determining an intima-media thickness from the images having enhanced resolution.

22. The method as in claim 20, further comprising determining at least one of a length, a width and a thickness from the images having enhanced resolution.