OpenCV oF Experiments

Code experiments related to computer vision & cinema posts on my blog at tylerhenry.com.
Mostly using OpenCV and openFrameworks.

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griddedHistogram

Contains Histogrid class: uses OpenCV calcHist to generate histograms for subsections of an ofImage. Written in openFrameworks v.9.0 / XCode 7

uses addons: ofxCv and ofxOpenCv

SIFT_filterMatches_homography

Updated, more complete SIFT implementation than SIFTtest (see below).
Written in openFrameworks v.9.0 / XCode 7

uses addons: ofxCv and ofxOpenCv

Related tutorial

SIFT Implementation in OpenFrameworks, Part 3

Updates over SIFTtest:

• SIFT implementation placed inside SIFTMatcher class
• added keypoint filter to sort out good keypoint matches
• added homography transformation to
  calculate 3D warp of query image to train img

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SIFTtest

First test of SIFT algorithm to match features between two images.
Written in openFrameworks v.9.0 / XCode 7

uses addons: ofxCv and ofxOpenCv

Related tutorial

SIFT Implementation in OpenFrameworks, Part 2

Intro tutorials

1. Getting Started
2. Finding Features
3. SIFT Implementation in OpenFrameworks, Part 1

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optFlowTest

Test of optical flow analysis using Farneback algorithm from OpenCV (through ofxCv) Written in openFrameworks v.9.0 / XCode 7

uses addons: ofxCv, ofxOpenCv and ofxGui

Display local motion in video as a flow field, and also:

• average motion per frame (red line in video center)
• average motion per clip (red line on left)
• track of average motion per clip (blue dot and path)

** Related tutorial**

Optical Flow, Part 1

YouTube sample