Method for removal of moving objects from a video stream

• US 7,483,062 B2
• Filed: 02/23/2005
• Issued: 01/27/2009
• Est. Priority Date: 04/28/2004
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Clee, Scott John, Allman, Mark
• Primary Examiner(s): Ahmed; Samir A
• Assistant Examiner(s): MOTSINGER, SEAN T
• Application Number:
  US11/064,352
• Publication Number:
  US 20050243192A1
• Time in Patent Office: 1,434 Days
• Field of Search: 348/239
• US Class Current: 348/239
• CPC Class Codes: G06T 7/215 Motion-based segmentation

Abstract

A method of removing a moving part from a video stream image comprising obtaining a plurality of frame-series images of the scene, each image comprising a moving part and a static part; comparing the plurality of frame-series images to identify parts of the scene that are static for a plurality of frames; and building part of the scene identified as static.

Claims

1. A method of removing a moving part from a video stream image of a given scene, the method comprising:

obtaining a plurality of frame-series images of a scene, each image comprising a moving part and a static part;

comparing the plurality of frame-series images to identify parts of the scene which are static for a plurality of frames;

histogramming the frame-series images in order to remove noise therefrom, wherein the histogramming comprises producing for each pixel a pixel confidence value representative of the ratio of a quantity of hits for a most common pixel color for the pixel and a total number of hits for the pixel, where each hit is associated with a histogram entry specific to the pixel and one of the frame-series images; and

building a single image of the scene comprising substantially a part of the scene identified as static by combining the histogrammed plurality frame series images to build the single image.

2. The method of claim 1 wherein the single image is formed using the most common value for each frame pixel, whereby the resulting image is a representation of the scene with an undesired moving object removed.

3. The method of claim 1 wherein the building comprises producing for each frame an image confidence value representative of the ratio of the total number of pixels in the image with pixel confidence value greater than a predetermined value and the total number of pixels in the image.

4. The method of claim 1 wherein the obtaining comprises obtaining a plurality of frame-series images of the scene captured with a motion control camera.

5. A computer readable medium storing a computer usable program which, when executed, causes a computer to perform processes, comprising:

obtaining a plurality of frame-series images of a scene, each image comprising a moving part and a static part;

comparing the plurality of frame-series images to identify parts of the scene which are static for a plurality of frames;

histogramming the frame-series images in order to remove noise therefrom, wherein the histogramming comprises producing for each pixel a pixel confidence value representative of the ratio of a quantity of hits for a most common pixel color for the pixel and a total number of hits for the pixel, where each hit is associated with a histogram entry specific to the pixel and one of the frame-series images; and

building a single image of the scene comprising substantially a part of the scene identified as static by combining the histogrammed plurality frame series images to build the single image.

6. The computer readable medium of claim 5, wherein the single image is formed using the most common value for each frame pixel, whereby the resulting image is a representation of the scene with an undesired moving object removed.

7. The computer readable medium of claim 5, wherein the building comprises producing for each frame an image confidence value representative of the ratio of the total number of pixels in the image with pixel confidence value greater than a predetermined value and the total number of pixels in the image.

8. The computer readable medium of claim 5 wherein obtaining the plurality of frame-series images comprises obtaining a plurality of frame-series images of the scene captured with a motion control camera.