US4118099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image coding and decoding using coherent codes
Assignee: US Philips Corp
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Filing: 1976-08-05
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Granted: 1978-10-03
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Expires: 1996-08-05
Abstract
Abstract A method of imaging a three-dimensional object with the aid of coding and decoding using coherent point codes, whereby the object is recorded in two steps, each with a plurality of radiation sources of different orientation on the same recording material. Negatives of the two images are produced, after which the positive of one image is combined with the negative of the other image, the combined images being subsequently multiplied by means of point holograms formed with the aid of a reference wave and a multiplicity of light sources whose co-ordinates correspond to those of the point images of the two source arrays recorded by a pinhole camera, the two multiplied images being superposed in one plane, the coded images being decoded by changing their scale with the aid of two synchronously controlled zoom lenses whereby the coordinates of the point image function of an image of an object layer in the coded images are adapted to the points stored in the two point holograms.
Inventors
- 👤 Hermann Weiss
- 👤 Erhard Klotz
- 👤 Ulf Tiemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:34
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/025; G; G03; G03H; G03H1/00; G03H1/04; G03H1/06; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14; H01F10/147
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A method of imaging a three-dimensional object with the aid of coding and decoding using coherent point codes, comprising recording the object with a plurality of radiation sources of different orientations on a recording medium, recording the object again separately with a second plurality of differently oriented radiation sources, forming the negatives of the two recorded images, separately combining the positive of each recorded image with the negative of the other image, to form two combined images, multiplying the combined images by means of point holograms formed with the aid of a reference wave and a multiplicity of light sources whose co-ordinates correspond to those of the point images of the two source arrays recorded by a pinhole camera, superimposing the two multiplied images in one plane, and decoding the coded images by changing their scale with the aid of two synchronously controlled zoom lenses whereby the co-ordinates of the point image function of an image of an object layer in the coded images are adapted to the points stored in the two point holograms.
Claim 2
Independent Claim
175 words
A method of imaging a three-dimensional object with the aid of coding and decoding using coherent point codes, comprising recording the object with a plurality of radiation sources of different orientations on a recording medium, recording the object again separately with a second plurality of differently oriented radiation sources, forming the negatives of the two recorded images, separately combining the positive of each recorded image with the negative of the other image, to form two combined images, multiplying the combined images by means of point holograms formed with the aid of a reference wave and a multiplicity of light sources whose co-ordinates correspond to those of the point images of the two source arrays recorded by a pinhole camera, superimposing the two multiplied images in one plane, and decoding the coded images by changing their scale with the aid of two synchronously controlled zoom lenses whereby the co-ordinates of the point image function of an image of an object layer in the coded images are adapted to the points stored in the two point holograms.
Claim 3
Dependent Claim
33 words
A method as claimed in claim 1, wherein the two coded images are obtained by X-ray flashes on two separate films from different directions, and that the negatives are made by contact printing.
Claim 4
Dependent Claim
38 words
A method as claimed in claim 2, wherein the information contained in the X-ray images is displayed on an electron-optical image transducer and the negatives are made by reversing the polarity of the information signal of the transducer.
Claim 5
Dependent Claim
34 words
A method as claimed in claim 1, wherein the two coded images are decoded by correspondingly shifting and adding the positives and negatives on an electronic storage tube by bright-dark and dark-bright scanning, respectively.
Claim 6
Dependent Claim
20 words
A method as claimed in claim 1 characterized in that the coded images are displayed on an image intensifier tube.
Claim 7
Dependent Claim
177 words
An improved method of imaging a three-dimensional object with the aid of coding and decoding using coherent point codes, whereby the object is recorded in two steps, each with a plurality of radiation sources of different orientation on the same recording material, the improvement wherein the two superposition images are separated by means of a grating, but are recorded on a record carrier in a grating-like multiplexed manner as a multiplexed image, a negative of this multiplexed image being made and the superposition images contained in the positive and the negative being spatially separated by way of a second grating and the positive of the one image being separately combined with the negative of the other image forming two combined images, the two resulting combined images being multiplied with the aid of two point holograms stored on a photographic plate, the said holograms being made with the aid of a reference wave and a multiplicity of light sources whose co-ordinates correspond to the point images of the two source arrays recorded by means of a pinhole camera.
Claim 8
Dependent Claim
177 words
An improved method of imaging a three-dimensional object with the aid of coding and decoding using coherent point codes, whereby the object is recorded in two steps, each with a plurality of radiation sources of different orientation on the same recording material, the improvement wherein the two superposition images are separated by means of a grating, but are recorded on a record carrier in a grating-like multiplexed manner as a multiplexed image, a negative of this multiplexed image being made and the superposition images contained in the positive and the negative being spatially separated by way of a second grating and the positive of the one image being separately combined with the negative of the other image forming two combined images, the two resulting combined images being multiplied with the aid of two point holograms stored on a photographic plate, the said holograms being made with the aid of a reference wave and a multiplicity of light sources whose co-ordinates correspond to the point images of the two source arrays recorded by means of a pinhole camera.
References Cited (Backward Citations)
US4023037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-02 | 1982-04-03 | 1982-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-02 | 1986-04-03 | 1986-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-02 | 1990-04-03 | 1990-10-03 | $7700.00 | Window Closed / Lapsed |