# US 9,124,877 B1 · Methods for acquiring stereoscopic images of a location

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- Number: US 9,124,877 B1
- Document ID: US9124877B1
- Status: Granted
- Kind: B1
- Application number: 13/694,782
- Filed: 2013-01-03
- Granted: 2015-09-01
- Earliest claimed: 2005-10-21
- Assignees: TRY Tech LLC
- Applicants: Thomas Paul Riederer
- Inventors: Thomas Paul Riederer
- Web page: https://patentgrep.com/patent/US9124877B1

## CPC

- H04N 13/194: Transmission of image signals
- H04N 13/133: Equalising the characteristics of different image components, e.g. their average brightness or colour balance
- H04N 13/189: Recording image signals; Reproducing recorded image signals
- H04N 13/218: using spatial multiplexing
- H04N 13/239: using two two-dimensional [2D] image sensors having a relative position equal to or related to the interocular distance (H04N13/243 takes precedence)
- H04N 13/246: Calibration of cameras
- H04N 13/296: Synchronisation thereof; Control thereof
- H04N 2213/001: Constructional or mechanical details
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

The present invention provides new and improved methods for acquiring stereoscopic image data and, in particular, stereoscopic images of a location. Some of the benefits of these methods include acquiring by a single user, without producing one or more substantially abrupt transitions in or between respective views or images, or capability for interactive adjustment of image aspects including interpupillary distance and convergence. The invention is capable of producing high resolution, real-time image data while avoiding or mitigating the deleterious effects of spurious parallax.

## Claims

### Claim 1

A method for acquiring stereoscopic images of a location, the method comprising the steps of:
(a) providing at least one optical instrument comprising at least one channel, wherein the at least one instrument is capable of acquiring a plurality of optical views corresponding to a left view and a right view of a stereoscopic image of the location;
(b) providing a first and a second optical path corresponding to the at least one channel and having a first and a second respective optical axes, wherein the first and the second optical paths are spaced a first interpupillary distance apart and are capable of providing a first and a second respective view of a stereoscopic image to the at least one instrument, and the first and second respective views correspond to a left view and a right view of a stereoscopic image of the location;
(c) setting the first and the second respective optical axes of each respective optical path, thereby aligning a vergence of the first and second respective optical axes to coincide at a first point in the location at a first desired distance;
(d) acquiring a first left and a first right respective view of a first stereoscopic image of the location;
(e) adjusting at least two of:
i. a focus of the first and second optical paths simultaneously and identically,
ii. a magnification of the first and second optical paths simultaneously and identically;
iii. an iris of the first and second optical paths simultaneously and identically,
iv. at least one of the first and second respective optical axes of the first and second optical paths, thereby aligning the vergence of the first and second respective optical axes to coincide at a second point in the location at a second desired distance, and
v. the interpupillary distance; and
(f) acquiring a second left and a second right respective views of a second stereoscopic image of the location,
wherein the adjusting is achieved without producing one or more substantially abrupt transitions in or between the first and the second respective views of the first and second stereoscopic images of the location.

### Claim 2 (depends on 1)

The method of claim 1, wherein the adjusting is performed by at least one user and the at least one user is observing at least one of the first or the second respective views.

### Claim 3 (depends on 2)

The method of claim 2, wherein the adjusting and the observing are performed by a single user.

### Claim 4 (depends on 3)

The method of claim 3 wherein the steps of adjusting and observing are performed simultaneously, the observing is performed by visual observation of a display, and the display is attached to the single user during the observing.

### Claim 5 (depends on 1)

The method of claim 1 wherein the adjusting of the at least two of:
i. a focus of the first and second optical paths simultaneously and identically;
ii. a magnification of the first and second optical paths simultaneously and identically;
iii. an iris of the first and second optical paths simultaneously and identically;
iv. at least one of the first and second respective optical axes of the first and second optical paths, thereby aligning the vergence of the first and second respective optical axes to coincide at a point in the location at a second desired distance; and
v. the interpupillary distance
is performed simultaneously.

### Claim 6 (depends on 1)

The method of claim 1 wherein the at least one optical instrument is a stereoscopic image acquisition device further comprising:
at least one optical sensor in the at least one optical path, wherein the at least one optical sensor is effective to generate at least one data stream corresponding to at least one image data for each view of the first and second respective view of a stereoscopic image provided to the at least one instrument, and at least one first data stream corresponding to the left view is simultaneously generated with at least one second data stream corresponding to the respective right view; and
a third, single data stream wherein the at least one first and second data streams are combined into a third, single data stream, timing among the first and second data streams is known and maintained, and the third, single data stream is effective to represent the stereoscopic image of the location in real time.

### Claim 7 (depends on 6)

The method of claim 6, further comprising the step of transmitting the third, single data stream to at least one other device, wherein:
the at least one optical sensor further comprises a plurality of pixels, and image data of the at least one first and second data streams comprises pixel data;
the image data corresponding to a pixel of the left view is simultaneously generated with the image data corresponding to the respective pixel of the right view, and
the first and second data streams of the respective left and right views are combined into the third, single data stream wherein timing among the pixel data is known and maintained.

### Claim 8 (depends on 7)

The method of claim 7, wherein the other device is a storage device configured to receive and store the single data stream.

### Claim 9 (depends on 7)

The method of claim 7, wherein the at least one other device is an image processing unit configured to receive the single data stream.

### Claim 10 (depends on 9)

The method of claim 9, further comprising the step of processing the single data stream,
wherein the image processing unit is further configured to perform at least one process, wherein the at least one process is selected from the group consisting of:
changing the brightness of each view, and
changing the contrast of each view, and
changing the white balance of each view, and
compressing the at least one image data for each view,
wherein the process is performed simultaneously to at least one image data for each view of the left and right respective view of a stereoscopic image comprising the single data stream.

### Claim 11

A method for acquiring stereoscopic images of a location, the method comprising the steps of:
(a) providing at least one optical instrument comprising at least one channel, wherein the at least one instrument is capable of acquiring a plurality of optical views corresponding to a left view and a right view of a first stereoscopic image of a location;
(b) providing a first and a second optical path corresponding to the at least one channel and having a first and a second respective optical axes, wherein the first and the second optical paths are spaced a first interpupillary distance apart and are capable of providing a first and a second respective view of a stereoscopic image to the at least one instrument, and the first and second respective views correspond to a left view and a right view of the first stereoscopic image of the location;
(c) setting the first and the second respective optical axes of each respective optical path, thereby aligning a vergence of the first and second respective optical axes to coincide at a first point in the location at a first desired distance;
(d) acquiring a first left and a first right respective view of the first stereoscopic image of the location;
(e) adjusting at least one of the first and second respective optical axes of the first and second optical paths, thereby aligning the vergence of the first and second respective optical axes to coincide at a second point in the location at a second desired distance; and
(f) acquiring a second left and a second right respective view of a second stereoscopic image of the location; and
(g) repeating steps (e) and (f), whereby vergence of the first and second respective optical axes coincides at one or more third points in the location at one or more corresponding third distances, thereby acquiring three or more successive stereoscopic images of the location,
wherein the adjusting is achieved without producing one or more substantially abrupt transitions in or between the left and the right respective views of the three or more successive stereoscopic images of the location.

### Claim 12 (depends on 11)

The method of claim 11 wherein the three or more successive points correspond to positions of an object moving within the location.