EP2260644A1 - Procédé d'enregistrement d'images de qualité - Google Patents

Procédé d'enregistrement d'images de qualité

Info

Publication number
EP2260644A1
EP2260644A1 EP08712895A EP08712895A EP2260644A1 EP 2260644 A1 EP2260644 A1 EP 2260644A1 EP 08712895 A EP08712895 A EP 08712895A EP 08712895 A EP08712895 A EP 08712895A EP 2260644 A1 EP2260644 A1 EP 2260644A1
Authority
EP
European Patent Office
Prior art keywords
high quality
image
detected
recording
images
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08712895A
Other languages
German (de)
English (en)
Inventor
Wee Boon Bernard Siah
Kee Eng Roger Teo
Ofer Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Artivision Technologies Ltd
Original Assignee
Artivision Technologies Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Artivision Technologies Ltd filed Critical Artivision Technologies Ltd
Publication of EP2260644A1 publication Critical patent/EP2260644A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/781—Television signal recording using magnetic recording on disks or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • H04N9/8047—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction using transform coding

Definitions

  • the present invention relates to a method of recording quality images during an important event detected by Video Content Analysis (VCA) in digital video recorders.
  • VCA Video Content Analysis
  • US patent application 20060171452 describes a method and apparatus for dual mode digital video recording. This patent focuses on a surveillance system comprising receiving video data from a surveillance camera, recording the received video data at a first rate, and recording the received video data at a second rate with the second rate being slower than the first rate. The quality images can be retrieved from the video data that is recorded at the slower rate.
  • US patent 6757008 describes a video surveillance system where a linescan camera is used in conjunction with a mechanical scanning mechanism to acquire high-resolution images of an area under video surveillance.
  • the video signal from the linescan camera is converted into a digital data stream, compressed, and stored in a digital memory.
  • full-field images are selectively recalled from the digital memory and converted to a lower resolution for display on a monitor.
  • the operator selects a region-of-interest from the full-field display through the use of a computer pointing device, such as a mouse.
  • the selected area is then displayed on the monitor in its full acquired resolution, thereby allowing the operator to view high-resolution images of a large area under surveillance.
  • US patent application 20040001149 describes a surveillance system formed from two video cameras monitoring the same area, where the first camera provides high temporal resolution, such as a conventional CCTV camera operating at 30 frames per second with 640 pixels per image width.
  • the second camera provides high spatial resolution, such as a linescan sensor with a mechanical scanning assembly, providing 2 images per second with 5120 pixels per image width.
  • the combination of these two cameras provides a video record of the monitored region with simultaneous high spatial resolution and high temporal resolution.
  • US patent application 20040161133 describes a system and method for video content-based detection, surveillance and alarm management, which is used in detection of unattended objects.
  • the main characteristics of MPEG are the compression of motion images by storing key images and motion information of intermediate frames, thus achieving a smaller file size stored, compared to storing each separate image.
  • the quality of the compression may be chosen by the user.
  • the disadvantage of this compression method is that video defects known as artifacts may occur, due to insufficient information for reconstructing the intermediate frames. This is usually caused by a recording of busy images set with a lower bit-rate than desired, or during the streaming of MPEG data which is degraded due to network infrastructure.
  • Digital video recorder systems utilizing the MPEG video compression method enable compact and efficient storage of video images with configurable preset video size-per-second to achieve the desired recording period within a defined of limited storage space.
  • MPEG compression also allows for the quick transmission and replay of the stored video file.
  • MJPEG Motion JPEG
  • JPEG Joint Photographic Experts Group
  • DVRs digital video recorders
  • VCA Video Content Analysis
  • the method is used in capturing video for a live streaming video signal from surveillance cameras.
  • the quality images are compressed in the MJPEG (Motion JPEG) format.
  • the video images are compressed in the MPEG format.
  • the images are stored in the MJPEG format before, during and immediately after an event occurs. This will ensure that the event can be played back with minimal quality degradation and useful information can be extracted from the recorded images.
  • the non-volatile storage would be a secondary storage device, such as a hard disk, server or any other effective non-volatile magnetic disks or storage devices.
  • FIG. 1 illustrates the process flowchart of the invention.
  • FIG. 1 illustrates the process flowchart of the dual digital video recording based on trigger signal from Video Content Analysis (VCA) system.
  • VCA Video Content Analysis
  • the present invention provides a method for recording quality images when a potential event is detected, as in shown in Figure 1.
  • the image(s) are copied to an event buffer (15) when an alert is triggered from the VCA Result Analyzer (11 ).
  • the image(s) are then converted into the MJPEG format and copied to a non-volatile storage medium (16) such as a hard disk, where the event images in the non-volatile storage medium (17) may be accessed later when needed.
  • Images recorded with the MJPEG format are higher quality images with less occurring artifacts.
  • the file sizes are comparatively larger than the formats conventionally used; therefore the present invention solves this by recording in this format when needed only.
  • the images are stored in the MJPEG format before, during and immediately after an event occurs. This will ensure that the event can be played back with minimal quality degradation and useful information can be extracted from the recorded images.
  • the storage used in this invention is a non-volatile secondary storage device, such as a hard disk. However, any other effective non-volatile storage may be used to store the images.
  • the present invention further provides a method for detecting potential events by utilizing Video Content Analysis.
  • the image is captured using a camera and is converted into a RAW image format (1 ), which is stored in a RAW image buffer (3) when required (2).
  • This RAW image format is copied (4) and further converted to an image format required by the VCA module (5).
  • the image is transferred to the VCA module (7) to be processed (6).
  • the results and image will be then pushed into a result analyzer (8).
  • the result analyzer will determine whether to trigger an alert (12). If an alert is triggered, a record is made in the metadata (13); finally the event metadata is stored in a non-volatile storage (14), preferably a hard disk.
  • Examples of potential events are in the form of unattended baggage and/or unusual behavior.
  • Other possible events include, but are not limited to; intrusion detection, crossing of specifically defined line, crowd detection and against crowd flow detection (where one person walks in a different direction from the rest).
  • This system utilizes a VCA module (7) which is a module for determining a potential event and a MJPEG encoder and decoder for compressing the images into a high quality format.
  • the VCA module (7) analyzes the image and based on the rules set, returns a result which determines the quality of images recorded. While images that are taken from the camera are being processed for potential events, there is a concurrent and continuous compression of images using the MPEG format.
  • the present invention also provides the retrieval and playback of stored data comprising the steps of returning of event metadata (24), listing event found in metadata (25), selecting of event to playback (32), playback of event image(s) (27), synchronization with MPEG video (33), comparing of event metadata against MPEG data to determine corresponding MPEG video (29), selecting of MPEG video to playback (34) and playback of MPEG video (31 ).
  • the present invention further provides a method of storing both the MPEG an MJPEG compressed images on a non-volatile storage by capturing the image and converting it into a RAW image (1 ), transferring of captured image to the MPEG compressor (18, 19), making record in metadata for MPEG (22) and finally storing the MPEG data into a non-volatile storage (23).
  • the indexing of events of the MPEG video enables the user of this system to navigate to the desired event easily.
  • the system that utilizes this method of the present invention comprises a:
  • a. motherboard a. graphic card, c. frame capture card, d. video compression card, e. video compression software, f. secondary storage such as a hard disk, g. main memory and h.

Abstract

La présente invention se rapporte à un procédé d'enregistrement d'images de qualité lors de la détection d'un événement potentiel. Le procédé consiste: à copier les images dans une mémoire tampon d'événement (15) lorsqu'une alerte est déclenchée depuis l'analyseur de résultat VCA (11, 12); à convertir l'image ou les images en un format de compression d'images de qualité élevée et copier l'image ou les images de qualité élevée dans une mémoire non volatile (16); et enfin, à et stocker les images d'événement dans une mémoire non volatile (17).
EP08712895A 2008-02-29 2008-02-29 Procédé d'enregistrement d'images de qualité Withdrawn EP2260644A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2008/000071 WO2009108124A1 (fr) 2008-02-29 2008-02-29 Procédé d'enregistrement d'images de qualité

Publications (1)

Publication Number Publication Date
EP2260644A1 true EP2260644A1 (fr) 2010-12-15

Family

ID=39830213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08712895A Withdrawn EP2260644A1 (fr) 2008-02-29 2008-02-29 Procédé d'enregistrement d'images de qualité

Country Status (5)

Country Link
EP (1) EP2260644A1 (fr)
CN (1) CN101971620A (fr)
AU (1) AU2008351466A1 (fr)
IL (1) IL207767A0 (fr)
WO (1) WO2009108124A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101990101A (zh) * 2010-11-04 2011-03-23 武汉钢铁(集团)公司 实时多媒体混合编解码方法
CN107623842A (zh) * 2017-09-25 2018-01-23 西安科技大学 一种视频监控图像处理系统及方法
TWM563707U (zh) * 2017-11-16 2018-07-11 英屬開曼群島商麥迪創科技股份有限公司 行車記錄器
CN109785235A (zh) * 2018-12-29 2019-05-21 华中光电技术研究所（中国船舶重工集团有限公司第七一七研究所） 基于压缩感知的红外行人图像超分辨率重建方法及系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3774914B2 (ja) * 1995-09-27 2006-05-17 ソニー株式会社 ビデオ装置
US6330025B1 (en) * 1999-05-10 2001-12-11 Nice Systems Ltd. Digital video logging system
US20060077256A1 (en) * 2003-11-07 2006-04-13 Silvemail William B High resolution pre-event record
US20050276445A1 (en) * 2004-06-09 2005-12-15 Silver William M Method and apparatus for automatic visual detection, recording, and retrieval of events
JP2007228337A (ja) * 2006-02-24 2007-09-06 Olympus Corp 画像撮影装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009108124A1 *

Also Published As

Publication number Publication date
IL207767A0 (en) 2010-12-30
AU2008351466A1 (en) 2009-09-03
CN101971620A (zh) 2011-02-09
WO2009108124A1 (fr) 2009-09-03

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