Apparatus and Method for Video Image Stitching

a video image and stitching technology, applied in the field of panoramic video image stitching, can solve the problems of high power requirements of the technique and excessive processing tim

Inactive Publication Date: 2013-06-06
AMAZON TECH INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a method for calibrating two cameras to ensure they capture images in the same way. The method involves using a test pattern and analyzing the resulting images to generate calibration parameters. These parameters are then applied to different video streams from the cameras to ensure accurate alignment. The technical effect of this method is to improve the accuracy and reliability of video data collected from multiple cameras.

Problems solved by technology

Existing techniques that endeavor to achieve this have high power requirements and excessive processing times, particularly in the context of mobile devices, which are constrained by these parameters.

Method used

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Embodiment Construction

[0011]An embodiment of the invention enables image stitching at high frame rates to produce an output video data stream created from more than one input video stream. Test and calibration processes using still photographs of charts and video capture of moving targets enable alignment of the cameras and determine the known overlap between cameras.

[0012]FIG. 1 illustrates a calibration technique utilized in accordance with an embodiment of the invention. A first camera 100 with a viewing angle 102 takes an image of a test pattern 104. Similarly, a second camera 106 with a viewing angle 108 takes an image of the test pattern 104. The viewing angles have an overlap region 110. The cameras 100 and 106 have fixed positions in mount 112. Each camera delivers image data to an image processor 114. The image processor 114 may be a computer with a central processor, graphics processing unit and / or an additional processor.

[0013]Still photographs are used to determine the fixed overlap area 110 ...

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Abstract

A method includes collecting a first image from a first video camera of a test pattern and a second image from a second video camera of the test pattern. The first image and the second image have an overlap region. The overlap region is evaluated to generate calibration parameters that accommodate for any vertical, horizontal or rotational misalignment between the first image and the second image. Calibration parameters are applied to video streams from the first video camera and the second video camera.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to U.S. Provisional Patent Application 61 / 566,269, filed Dec. 2, 2011, entitled “Panoramic video Camera System and Related Methods”, the contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates generally to video image processing. More particularly, this invention relates to panoramic video image stitching utilizing alignment and calibration parameters for dynamic video image compensation.BACKGROUND OF THE INVENTION[0003]Panoramic video feeds should be combined in a seamless manner. Existing techniques that endeavor to achieve this have high power requirements and excessive processing times, particularly in the context of mobile devices, which are constrained by these parameters.SUMMARY OF THE INVENTION[0004]A method includes collecting a first image from a first video camera of a test pattern and a second image from a second video camera of the test pattern....

Claims

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Application Information

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IPC IPC(8): H04N5/232
CPCH04N2101/00H04N5/23238H04N23/698H04N21/21805H04N21/234363H04N21/23439H04N21/2393H04N21/4223H04N21/4668H04N21/47202H04N21/4728H04N21/816
InventorBANTA, BILLDONALDSON, GEOFF
OwnerAMAZON TECH INC