user perciano
TRANSCRIPT
Image analysis and statistics: an introduction using R and RIPA
Image analysis and statistics: an introductionusing R and RIPA
Talita Perciano, PhD
Computational Research DivisionLawrence Berkeley National Laboratory
useR! 2014
Image analysis and statistics: an introduction using R and RIPA
Table of contents
Image Processing
RIPA package
R, Image Processing and Big Data
Acknowlegments
Image analysis and statistics: an introduction using R and RIPA
Image Processing
What is Image Processing?
Digital Image Processing
Any process applied to a digital image performed by a computer
Some main points about images:I 2-D image: bidimensional function f(x, y), where x and y
are the spatial coordinates and the amplitude of f at (x, y)is called the intensity at that point
I Finite number of elements: each one with a position and ascalar or vectorial value
f(x,y)=125
f(x,y)=(125,82,48,100)
Image analysis and statistics: an introduction using R and RIPA
Image Processing
Importance and utility
I Very broad field of studyI From common operations (contrast and noise reduction) to
more complex ones (image segmentation/classification andpattern recognition)
I High importance to scientific research
I Advent of Big Data and Data Science β Dicover knowledge
I Research fields: Geoscience and Remote Sensing,Bioinformatics, Biology, Medicine, Physics, Astronomy, toname a few
Image analysis and statistics: an introduction using R and RIPA
RIPA package
What is RIPA?
RIPA
R Image Processing and Analysis
I User friendly package providing image processing tools
I Analysis and exploration tools that can be applied todiverse domains
I RIPA can be used as an auxiliary tool for learning statisticsand image analysis
Image analysis and statistics: an introduction using R and RIPA
RIPA package
What is RIPA?
Image analysis and statistics: an introduction using R and RIPA
RIPA package
What can I do with RIPA?
I Reading and writting
I Punctual operationsI NegativeI Brightness and contrastI Linear contrast stretch and equalization
I Local operationsI Filtering: sobel, laplacian, high/low-pass, median, meanI Segmentation
I General analysis of bandsI Statistics of each bandI BrushplotsI PCA analysis
Image analysis and statistics: an introduction using R and RIPA
RIPA package
What can I do with RIPA?
I Regions of InterestI Different types of ROII Statistics, covariance matrices, brushplots and dynamic
graphics
I Special manipulation for multidimensional dataI Satellite images such as AVIRIS and LANDSATI Preview of samples before reading
I What about Big Data, High Performance and RIPA?
Image analysis and statistics: an introduction using R and RIPA
R, Image Processing and Big Data
R, Image Processing and Big Data
What ca be used for Big Image Data in R:
I bigmemory - manage massive matrices with shared memoryand memory-mapped files
I biganalytics - extends the bigmemory package withanalytics functions
I bigkmeans - implementation of k-means clusteringalgorithm for native or bigmemory R objects
I Can be used along with HP related packages such as Rcpp,parallel, doSNOW, doMC
I bigvis - tools for exploratory data analysis of largedatasets (10-100 million obs.). Reduce data points forvisualization
I bigpca - provides principal component analysis forbigmemory objects
Image analysis and statistics: an introduction using R and RIPA
R, Image Processing and Big Data
R, Image Processing and Big DataExamples
I Β΅-CT data obtained fromALS/LBNL (ceramiccomposite)
I Resolution of0.65Γ 0.65Γ 0.65Β΅m
I This complete stack has 5000slices (16GB)
I Complete set of stacks of acommon experiment reachesTB of data
Image analysis and statistics: an introduction using R and RIPA
R, Image Processing and Big Data
R, Image Processing and Big DataExamples
(a) One slice from Β΅-CT data (b) Segmented slice usingbigkmeans
Image analysis and statistics: an introduction using R and RIPA
R, Image Processing and Big Data
R, Image Processing and Big DataExamples
0
1000
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3000
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0 50 100 150 200# slices (each slice 1800x1950)
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(s) "kmeans"
bigkmeans
kmeans
kmeans x bigkmeans
Figure : Execution time for different number of slices from Β΅-CTdata. The maximum number of slices shown is 200 (702,000,000 obs.).System details: Intel Xeon CPU 2.53GHz x 16
Image analysis and statistics: an introduction using R and RIPA
R, Image Processing and Big Data
R, Image Processing and Big DataExamples
0e+00
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Histogram from 100 slices
Figure : Histogram of 100 slices from Β΅-CT data using bigvis package(0.7s). Attempt to use the usual plot was interrupted after 1 hour
Image analysis and statistics: an introduction using R and RIPA
R, Image Processing and Big Data
R, Image Processing and Big DataExamples
I Landsat 8 OLI image of theBay Area obtained fromglovis.usgs.gov
I 11 spectral bands (about 1GB)
I Easy to visualize data?
Image analysis and statistics: an introduction using R and RIPA
R, Image Processing and Big Data
R, Image Processing and Big DataExamples
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ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
β
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
β
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
β
ββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββ
β
βββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββ
ββββββββββββββββββββββ
ββββββββββββββββββββββββ
ββββββββββββββββββββββββ
ββββββββββββββββββββββββββββ
ββββββββββββββββ
ββββββββββββββββββββββ
βββββββββββββββββββββ
ββββββββββββββββββ
βββββββββββββββββ
ββββββββββββββββ
ββββββββββββββ
βββββββββββββββ
ββββββββββββ
ββββββββββββββ
ββββββββββββββββββ
ββββββββββββββ
βββββββββββββ
ββββββββββββ
ββββββββ
βββββββββ
βββββββββββββββββββββββββββββ
βββββββββ
βββββββββββββββββββββββββ
βββββββββββ
ββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββ
ββ
Band5100
50 100
Corr:
0.778
βββββββββββββββββ
ββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
β
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββ
ββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββ
β
ββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββ
ββββββββββ
ββββββββββββββββββββββββββββ
βββββββ
ββββββββββββββββββββββββββ
β
βββββββββββ
ββββββββββββββββββββββββββ
ββββββββ
βββββββββββββββββββββββββ
ββββββββββββ
βββββββββββββββββββββββββββ
βββββββββββ
ββββββββββββββββββββββββββ
ββββββββββ
ββββββββββββββββββββββ
ββββ
ββββββββββββββββββββ
β
ββββ
βββββββββββββββββββ
βββ
ββββββββββββββββββββββ
ββββ
β
ββββββββββββββββββ
βββ
ββββββββββββββββββββββ
ββ
ββββββββββββββββ
βββββ
βββββββββββββββββββββββ
ββββ
ββββββββββββββββ
βββ
ββββββββββββββββββ
ββ
ββββββββββββ
ββ
ββββββββββββββββ
ββββββββββββ
β
ββββββββ
β
ββββββββββββββββ
ββββββββ
β
ββββββ
βββββββ
ββββββββ
β
ββββ
βββββββββββββ
ββββ
βββββββββββββββββββ
β
ββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
β
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββββ
β
βββββββββββββββββββββββββββββββββββββββββββββββ
β
βββββββββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββ
βββββββββββ
βββββββββββββββββββββ
βββββββββ
βββββββββββββββββββββββββ
β
βββββββββββ
βββββββββββββββββββββββ
ββββββ
ββββββββββββββββββββββββ
βββββββ
ββββββββββββββββββββ
ββββββββββββ
ββββββββββββββββββββββ
βββββββββ
ββββββββββββββββββββββββ
βββββββ
ββββββββββββββββββββ
ββββββ
βββββββββββββββββββ
β
ββββββ
βββββββββββββββββββββββ
βββββ
βββββββββββββββββ
ββββ
ββββββββββββββββββ
βββ
β
ββββββββββββββββββββ
βββ
βββββββββββββ
ββ
βββββββββββββββββ
ββββββ
βββββββββββββββββββ
βββ
ββββββββββββββββ
ββ
βββββββββββββ
ββ
ββββββββββββ
β
ββββββββββββββ
β
ββββββββββ
β
ββββββββββββββββββββββ
β
ββββββββ
βββββββββββ
β
ββββββ
βββββββββ
ββββββββ
βββββ
ββββββ
β
ββββββββββββ
ββ
ββ
ββββββββββββββ
βββ
βββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββ
βββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββ
ββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Band6100
50 100
Figure : Pair plot of 6 bands using GGally along with bigvis
Image analysis and statistics: an introduction using R and RIPA
R, Image Processing and Big Data
Final Comments - Big Data and RIPA
I RIPA already has a starting point for parallel processing
I RIPA is being taught how to talk to big* family packages(examples shown before)
I A lot of work to do!I Compatibility with image formats to be readI Few image processing/pattern recognition algorithms that
can be used with existent Big Data packagesI Visualization is still a challenge
Image analysis and statistics: an introduction using R and RIPA
Acknowlegments
Acknowlegments
This work is supported by the U.S. Department of Energyunder contract no. DE-AC03-76SF00098
S P R I N G E R B R I E F S I N CO M P U T E R S C I E N C E
Alejandro C. Frery Β· Talita Perciano
Introduction to Image Processing Using RLearning by Examples
Alejandro C. FreryTalita Perciano
Introduction to Image Processing Using RLearning by Examples
Frery Β· PercianoIntroduction to Im
age Processing Using R
S P R I N G E R B R I E F S I N CO M P U T E R S C I E N C E
Computer Science
ISBN 978-1-4471-4949-1
301403_Print.indd 1301403_Print.indd 1 12/7/2012 8:24:51 PM12/7/2012 8:24:51 PM
I Being used for introductory courses
I Downloaded 3567 times last year
I http://tinyurl.com/khv6rmn