nick hunter - cs-courses.mines.edu
TRANSCRIPT
Motivation Current Study
Experiment Setup Video Clustering System Database Development
Shot Transition Detection Shot Transition Detection Threshold Motion
Haar‐Cascade Classification Haar‐like features, Neural Network and AdaBoost Development Clustering
PCA‐Eigenface Recognition Eigenfaces Neighboring Compression Recognition
Conclusions/Future works
Recent Studies Showed an video/image to a patient Scanned their brain for activity From the brain scan they used the activity to guess and reconstruct the video/image shown
Reconstruction : was of natural images based on both the structure and semantic content of the images simultaneously
Haar‐Cascade Classifierswill be used to find and collect faces of many characters, also help develop character specific classifiers.
Shot Transition Detection will help with: when to break tracking and when to start a new tracking set, which helps maintain where the object is within a frame‐set.
K‐means theory to group the images of the characters to send to a database.
Principal Component Analysis (PCA) from the collection of faces this learning algorithm will use eigenfaces to create a recognition database.
prior and current images were: Converted to 8‐bit images Gaussian Blurred
| ‐ | Compared to a white 255 level image of the same size.
From this ratio disparity there suggest a level of motion activity in the movie.
50 100 150 200Threshold �x��720�480�0.256 �
2000
4000
6000
8000
Frames Below Threshold
(| , , ‐ , , |/ 720*480*0.256) > Threshold
Mahalanobis distances DFFS and DIFSallow for probabilistic interpretations ‐>
<‐Euclidean distance is nota multivariate effect size
More understanding of the Robustness of each Algorithm
Further work is needed on Video motion to: Better detect shot transitions Know if clustering characters is viable
Database development Currently has only character segregation features Need to develop other semantic types to search for in the Brain
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faces,” Pattern Analysis and Machine Intelligence, IEEE Transactions on, vol. 12, no. 1, pp. 103 –108, Jan. 1990. http://en.wikipedia.org/wiki/Fmri http://en.wikipedia.org/wiki/Bayes%27_theorem Visual Image Reconstruction from Human Brain Activity using a Combination of Multiscale Local Image
Decoders
http://en.wikipedia.org/wiki/Fmri
Blood‐oxygen‐level dependent (BOLD)is the MRI contrast of blood deoxyhemoglobin
PROSnoninvasively record brain signalsresolution can be as good as 1mm.Localized recordings of signals of the brainfMRI is widely used and standard data‐analysisapproaches have been developed which allowresearchers to compare results across labs.fMRI produces compelling images of brain "activation".