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Video Analytics on Hadoop webinar victor fang-201309
1.
A NEW PLATFORM
FOR A NEW ERA
2.
2© Copyright 2013
Pivotal. All rights reserved. 2© Copyright 2013 Pivotal. All rights reserved. What You Can Do With Hadoop Webinar Series Unstructured Data – Video Analytics September 6, 2013 Dr. Chunsheng (Victor) Fang, Sr. Data Scientist Annika Jimenez, Global Head of Data Science Services Nikesh Shah, Sr. Product Marketing Manager
3.
3© Copyright 2013
Pivotal. All rights reserved. What You Will Learn Pivotal Data Science Lab Services New Emerging Trends for Unstructured Data Video Analytics on Hadoop Analytics with SQL
4.
© Copyright 2013
Pivotal. All rights reserved. Pivotal Platform Cloud Storage Virtualization Data & Analytics Platform Cloud Application Platform Data-Driven Application Development Pivotal Data Science Labs
5.
© Copyright 2013
Pivotal. All rights reserved. Pivotal Data Science
6.
© Copyright 2013
Pivotal. All rights reserved. Data Science Value Chain Instrume n-tation Logs Capture Store Transfor m and Prepare Access Model Developm ent Deploy Applicatio ns Process Change Product Engineer Platform Engineer DBA Data Engineer/Progr ammer Data Engineer Data Scientist Platform Engineer Application Developer PMO
7.
© Copyright 2013
Pivotal. All rights reserved. How We Help Our Customers 1. Data Science Strategy Definition 2. Point Proof-of-Value Model Development 3. Multiple Model Development + Apps 4. DSIC Transformation to “Predictive Enterprise” 5. Also: – Algorithm development – Pushing the envelope in problem-solving Pivotal Data Science Labs
8.
© Copyright 2013
Pivotal. All rights reserved. Pivotal Data Science Knowledge Development
9.
© Copyright 2013
Pivotal. All rights reserved. Pivotal Data Science Dream Team • Derek Lin – Network Security, Fraud Detection, Speech and Language Processing, (Principal Scientist at RSA, M.S. in Signal Processing, USC) • Hulya Farinas – Optimization, Resource Allocation in Healthcare (Modeler at M-Factor, IBM, Ph.D. in Operations Research, University of Florida) • Kaushik Das – Mathematical Modeling in Energy, Retail and Telco(Director of Analytics at M-Factor, M.S. in Mineral Engineering, UC Berkeley) • Sarah Aerni – Genomics and Machine Learning (Ph.D. in Biomedical Informatics, Stanford) • Mariann Micsinai – Next Generation Sequencing (Market Risk Management Associate at Lehman Brothers, Ph.D. in Computational Biology, NYU and Yale) • Victor Fang – Imaging and Graph Analytics, Machine Learning (Sr. Scientist at Riverain Medical, SDE at Amazon.com, Ph.D. in Computer Sciences, University of Cincinnati) • Emily Kawaler – Clinical Informatics and Machine Learning (M.S. in Computer Sciences, University of Wisconsin-Madison) • Anirudh Kondaveeti – Trajectory Data Mining and Machine Learning (Ph.D. in Computing & Dec. Systems Eng, Arizona State University) • Hong Ooi – Insurance and Finance Risk Modeling (Statistician at ANZ, Ph.D. in Statistics, Australian National University) • Michael Brand –Text, Speech and Video Research for Retail, Finance and Gaming (Chief Scientist at Verint Systems, M.S. in Applied Mathematics, Weizmann Institute) • Kee Siong Ng – Data Mining in Healthcare (Sr. Data Miner at Medicare Australia, Ph.D. in Computer Science, and Postdoctoral Fellow, Australian National University) • Noelle Sio – Digital Media Analytics and Mathematical Modeling(Sr. Analyst at eHarmony, Fox Interactive Media (Myspace), M.S. in Applied Mathematics, Cal Poly Pomona) • Jin Yu – Stochastic Optimization, Robust Statistics in Machine Learning, Computer Vision (Research Associate at U of Adelaide, Ph.D. in Machine Learning, Australian National University) • Rashmi Raghu – Computational Methods and Analysis (Ph.D. in Mechanical Engineering, Stanford) • Woo Jung – Bayesian Inference and Demand Analysis (Sr. Statistician at M- Factor, M.S. in Statistics, Stanford) • Jarrod Vawdrey – Marketing Analytics & SAS (Analytics Consultant at Aspen Marketing, B.S. in Mathematics, Kennesaw State University) • Niels Kasch – Text Analytics and NLP (Ph.D. in Computer Science, UMBC) • Vivek Ramamurthy – Online Learning, Stochastic Modeling, Convex Optimization (Ph.D. in Operations Research, UC Berkeley) • Srivatsan Ramanujam – NLP and Text Mining (Natural Language Scientist at Sony, Salesforce.com, M.S. in Computer Sciences, UT Austin) • Alexander Kagoshima – Time Series, Statistics and Machine Learning (M.S. in Economics/Computer Science, TU Berlin)
10.
© Copyright 2013
Pivotal. All rights reserved. Data Science Labs: Packaged Services LAB PRIMER (2-Week Strategy) • Customized Analytics Roadmap • 1-day Moderated Brainstorming Session • Prioritized Opportunities • Architectural Recommendations LAB 600 (6-Week Lab) • Prof. Services (Data Load) • Data Science Model Building • Project Management • Ready-to-Deploy Model(s) LAB 1200 (12-Week Lab) • Prof. Services (Data Load) • Data Science Model Building • Project • Management • Ready-to-Deploy Model(s) LAB 100 (2-Week Lab) • On-site Pivotal Analytics Training • Rapid Model/Insight Build on Customer Data (2 weeks)
11.
© Copyright 2013
Pivotal. All rights reserved. Approach: Data Science Lab 1200 Week 1 2 3 4 5 6 7 8 9 10 11 12 Data Exploration Features Building Model Development Code QA and Scoring Model Optimization & Validation Data Loaded Insights Presentation Training Preliminary Model Review Feature Review Data Review Documentation
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© Copyright 2013
Pivotal. All rights reserved. Program Management Data Architecture and Engineering Data Scientists Training and Skills Development Facilitate data loading processes from source systems to Pivotal Data Fabric Coordinate data needs with Data Scientists Best practice education for analytics performance Data migration to support new applications Oversight and communication plans Organizational alignment Risk mitigation Resource planning Prioritize deliverables Socialize progress of overall initiative Instill data collaboration culture Execute Data Science Lab engagements around revenue generation or cost saving efforts Hands on education with new data analysis techniques Introduce new analytics tools and methodologies Identify candidates for deeper data science training Create training curriculum Recruiting Methodology Parallel computing techniques defined and demonstrated Build institutional knowledge for client data science team Data Science Innovation Center (DSIC) Key Principles • Building a predictive enterprise is, first and foremost, about building a human infrastructure. • Analytics is an iterative knowledge discovery process and needs to be managed as such. • Discovery starts from asking the right questions – that can be as important as finding answers to those questions.
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Pivotal. All rights reserved.© Copyright 2013 Pivotal. All rights reserved. Large Scale Video Analytics Platform on Hadoop Dr. Chunsheng (Victor) Fang, Sr. Data Scientist
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Pivotal. All rights reserved. Pivotal Video Analytics Taskforce Chunsheng (Victor) Fang, Ph.D. – Sr. Data Scientist Regunathan Radhakrishnan, Ph.D. – Sr. Data Scientist Derek Lin, – Principal Data Scientist Sameer Tiwari – Hadoop Architect Kenneth Dowling & Michael Nemesh – DCA Admin
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Pivotal. All rights reserved. Industry Use Case Surveillance Video Anomaly Detection
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Pivotal. All rights reserved. Anomaly Detection in Surveillance Video Detect anomalous objects in a restricted perimeter. Typical large enterprise collects TB’s video per day. Hadoop MapReduce runs computer vision algorithms in parallel and captures violation events. Post-Incident monitoring enabled by Hadoop / HAWQ.
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Pivotal. All rights reserved. Unstructured Video Data Workflow Unstructured data as input ETL: Distributed Video Transcoder Analytics: Distributed Video Analytics Structured Insights in relational database for advanced analytics ETL Analytics Unstructured Data Structured Insights
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Pivotal. All rights reserved. Real World Video Data • Benchmark Surveillance Videos (i-LIDS) from United Kingdom Home Office – Library of HiDef CCTV video footage based around ‘scenarios’ central to the government’s requirements. – The footage accurately represents real operating conditions and potential threats. • Anomaly Detection: Sterile zone dataset Night Day
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Pivotal. All rights reserved. Most Common Video Standards MPEG & ITU: responsible for many video standards MPEG-2 (1995): Widely adopted, DVDs, Digital TV broadcast, set-top boxes
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Pivotal. All rights reserved. Intro to MPEG Standard MPEG standard encodes video frames – Redundancy in time: inter-frame encoding – Redundancy in space: intra-frame encoding Motion compensation – I-frame: (Key frame) intra-frame encoding – P-frame: (Predicted frame) Predicting regions of current frame from previous frame – B-frame: (Bi-predictive frame) Predicting regions of current frame using both previous and next frame
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Pivotal. All rights reserved.© Copyright 2013 Pivotal. All rights reserved. 22© Copyright 2013 Pivotal. All rights reserved. Distributed Video Transcoder on Hadoop Distributed MapReduce MPEG Transcoder
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Pivotal. All rights reserved. Motivation of Distributed Video Transcoding Can we decode the individual frames from an arbitrary block in Hadoop File System (HDFS)? Hadoop splits any file into 64MB or 128MB blocks in HDFS. Each block can be processed in parallel by customized Map-Reduce function Most video file standards are Not Hadoop-Friendly.
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Pivotal. All rights reserved. Decoding MPEG-2 with MapReduce Two key observations – Video header information: available only at the header in the bitstream – Group of Pictures (GOP) header repeats Steps to decode arbitrary blocks – Step 1: Configure each mapper to extract the header information from each file; ▪ Totals ~20 videos at 5GB – Step 2: Start searching for GOP header in each block in parallel; – Step 3: Decode frames into a suitable image format (JPEG, BMP, etc); – Step 4: Consolidate all time-stamped frames into Hadoop Sequence File. ▪ Reduces to sequence file at 500MB Transcoding MPEG-2 video into Hadoop-friendly format
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Pivotal. All rights reserved.© Copyright 2013 Pivotal. All rights reserved. Distributed Video Analytics Platform on Hadoop
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Pivotal. All rights reserved. Object Detection with Gaussian Mixture Model • The video data is much more noisier than we realize. • You don’t realize it because your visual cortex can denoise. • For computer, it requires good statistical models (e.g. GMM) for robustness. Distribution of pixel intensities over time
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Pivotal. All rights reserved. Typical Video Analytics Workflow Video/image data are highly unstructured Hadoop proven to be excellent in extracting structured insights from Big Data A typical workflow: ANALYTIC RESULT Foreground Extraction Background Stat Model Visual Key Composite Key Feature Extraction /Classification ((Key, Time), Loc)
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Pivotal. All rights reserved. Use Case 1: Anomaly Detection Extracting structured info from Unstructured data Computer vision algorithms fit into Mapper/Reducer framework Intermediate (Key, Value) – (RestrictedArea, IntrusionEvent(Time, ViolatorImage) ) Map Reduc e HDFS Map Map Map HDFS / GPDB Reduc e Reduc e 2012-09-01 07:00:00
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Pivotal. All rights reserved. Use Case 2: Trajectory Analysis Tracking multiple objects in Big Data video archives Building high level summarization e.g. moving trajectory time series T1 T2 T3 T4 T5 T6
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Pivotal. All rights reserved. Use Case 2: Trajectory Analysis “Map” Map Foreground Extraction Background Stat Model Visual Key Composite Key Feature Extraction /Classification ((VisKey, time), loc) Emit(K,V)
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Pivotal. All rights reserved. Use Case 2: Trajectory Analysis “Reduce” Reduce Aggregate User defined Trajectory model (Object, Trajectory) 2nd Sort on Composite key ((VisKey, time), loc)
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Pivotal. All rights reserved. Video Analytics Platform Supports Video ETL – Support standard formats: MPG, AVI, MP4. – Sequence file in HDFS Image Processing Toolkit – Support standard formats (e.g. JPEG, BMP, PNG) – Color space conversion – Edge/key point detection – Morphological processing – Filtering: convolutional, median, etc. PHD MapReduce for scalable computer vision algorithms HAWQ SQL for high level analytics
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Pivotal. All rights reserved. Video Analytics Demo
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Pivotal. All rights reserved. Performance Quick Facts Each frame takes 103 millisecond to process a 720x576 video frame (near real time even in Java) Detection algorithm: Linearly scale with #processors • Impacts: • Enhance public security • Improve security officers’ producitivity
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Pivotal. All rights reserved. Querying the Analytics Results • Average speed of the red car on yesterday, using window function SELECT sqrt(power(avg(abs(x_diff)),2) + power(avg(abs(y_diff)),2))*FPS_MPS_FACTOR FROM ( SELECT X-lag(X,1) OVER (ORDER BY TIME ) AS x_diff, Y-lag(Y,1) OVER (ORDER BY TIME ) AS y_diff FROM SANMATEO WHERE TARGET = AND TIME > (CURRENT_TIMESTAMP – INTERVAL ‘1’ DAY) AND TIME < (CURRENT_TIMESTAMP ); ) x_tmp; • RESULT: • 7.2 mph
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Pivotal. All rights reserved. More Use Cases Most of computer vision algorithms are embarrassingly parallel No data sharing between processes – Feature extraction – Object detection/classification Video Categorization for user generated contents – Find out trending in Youtube videos by topic modeling Object Detection – Detect known categories of objects, e.g. face, bar code, vehicle. Object Search – Given a known object, using template matching to locate the object Haar-like + AdaBoost Cascade Face Detector
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Pivotal. All rights reserved. Summary Hadoop : a great tool for data scientists to crunch Unstructured Big Data! Hadoop extracts Structured insights from Unstructured video with customized computer vision algorithms. Scalable framework with ease of experimenting, developing, deploying! Pivotal HD demonstrates large scale video analytics use cases: – Anomaly detection – Trajectory analysis – More …
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Pivotal. All rights reserved. 48© Copyright 2013 Pivotal. All rights reserved. Q&A
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Pivotal. All rights reserved. More Information Pivotal Blog Site August 12, 2013 Large Scale Video Analytics Contact the Data Science Lab Services info@gopivotal.com
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Pivotal. All rights reserved. 50© Copyright 2013 Pivotal. All rights reserved. Thank You
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A NEW PLATFORM
FOR A NEW ERA
Notes de l'éditeur
Not demoing the HAWQ integration today.
In surveillance video, most of time nothing interesting happens Manually Fast Forward/Backward to locate events is painful Gets even worse with TB’s video data!
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