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PRESENTATION REU IN COMPUTER VISION 2014 AMARI LEWIS CRCV UNIVERSITY OF CENTRAL FLORIDA.

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Presentation on theme: "PRESENTATION REU IN COMPUTER VISION 2014 AMARI LEWIS CRCV UNIVERSITY OF CENTRAL FLORIDA."— Presentation transcript:

1 PRESENTATION REU IN COMPUTER VISION 2014 AMARI LEWIS CRCV UNIVERSITY OF CENTRAL FLORIDA

2 IMPLEMENTING DIFFERENT WAYS TO IMPROVE PICTURES… Original The top image combines the different channels and uses convolution F *h= Σ Σ f(k,l)h(-k,-l) F= image H=kernel

3 COMBINE CHANNELS

4 GAUSSIAN Type of smoothing, a weighted average of the surrounding pixels using this formula: The sigma value determines the amount of ‘blurr’ the image will display. Gaussian smoothing Original

5 ‘LAPLACIAN’ Finds the 2 nd Derivative of Gaussian

6 HISTOGRAM – USED TO REPRESENT EACH COLOR IN THE IMAGE OBSERVE BELOW

7 EDGE DETECTION- Roberts Roberts: finds edges using the Roberts approximation to the derivative. It returns edges at those points where the gradient of I is maximum. Canny Uses two thresholds to determine between weak and strong edges Canny Roberts

8 EDGE DETECTION WITH THRESHOLD Sobel X: [1 0 -1, 2 0 -2, 1 0 -1] Y: [1 2 1, 0 0 0, -1 -2 -1] Calculates: √(d/x)²+(d/dy)²

9 PYRAMIDS

10 ADABOOST – FACE DETECTION Boosting defines a classifier using an additive model F(x) = ∂1f1(x) +∂2f2(x)+∂3f3(x)…. F:strong classifier X- feature vectors Sigma= weight f – weak classifiers

11 TRIAL 2

12 SVM SVM (Support Vector Machine) classifier is able to test trained data to analyze and divide results. (object ore non—object) This is an example of linear classification Linearsvm calculates : f(x) = w^Tx+b where w is the normal line or weight vector and b is the bias

13 RESIZING MULTIPLE IMAGES THROUGH FOR LOOPS..

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16 LUCAS KANADE (LEAST OF SQUARES) Optical flow equation- Considers a 3x3 window

17 Lucas Kanade

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20 OPTICAL FLOW

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22 LUCAS KANADE WITH PYRAMIDS

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24 CLUSTERING, BAG OF FEATURES

25 THE PROJECT I’M INTERESTED IN WORKING ON THE APPLICATIONS OF LIGHT FIELDS IN COMPUTER VISION AIDEAN SHARGHI

26 THANK YOU !! I APPRECIATE THE OPPORTUNITY ONCE AGAIN AND I AM LEARNING A LOT FROM THIS EXPERIENCE THANKS, OLIVER NINA DR. LOBO DR. SHAH


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