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Index
Cover
Table of Contents
OpenCV: Computer Vision Projects with Python
OpenCV: Computer Vision Projects with Python
OpenCV: Computer Vision Projects with Python
Credits
Preface
What you need for this learning path
Who this learning path is for
Reader feedback
Customer support
1. Module 1
1. Setting up OpenCV
Running samples
Finding documentation, help, and updates
Summary
2. Handling Files, Cameras, and GUIs
Project concept
An object-oriented design
Summary
3. Filtering Images
Channel mixing – seeing in Technicolor
Curves – bending color space
Highlighting edges
Custom kernels – getting convoluted
Modifying the application
Summary
4. Tracking Faces with Haar Cascades
Getting Haar cascade data
Creating modules
Defining a face as a hierarchy of rectangles
Tracing, cutting, and pasting rectangles
Adding more utility functions
Tracking faces
Modifying the application
Summary
5. Detecting Foreground/Background Regions and Depth
Capturing frames from a depth camera
Creating a mask from a disparity map
Masking a copy operation
Modifying the application
Summary
A. Integrating with Pygame
Documentation and tutorials
Subclassing managers.WindowManager
Modifying the application
Further uses of Pygame
Summary
B. Generating Haar Cascades for Custom Targets
Finding the training executables
Creating the training sets and cascade
Testing and improving <cascade>
Summary
2. Module 2
1. Detecting Edges and Applying Image Filters
Blurring
Edge detection
Motion blur
Sharpening
Embossing
Erosion and dilation
Creating a vignette filter
Enhancing the contrast in an image
Summary
2. Cartoonizing an Image
Keyboard inputs
Mouse inputs
Interacting with a live video stream
Cartoonizing an image
Summary
3. Detecting and Tracking Different Body Parts
What are integral images?
Detecting and tracking faces
Fun with faces
Detecting eyes
Fun with eyes
Detecting ears
Detecting a mouth
It's time for a moustache
Detecting a nose
Detecting pupils
Summary
4. Extracting Features from an Image
What are keypoints?
Detecting the corners
Good Features To Track
Scale Invariant Feature Transform (SIFT)
Speeded Up Robust Features (SURF)
Features from Accelerated Segment Test (FAST)
Binary Robust Independent Elementary Features (BRIEF)
Oriented FAST and Rotated BRIEF (ORB)
Summary
5. Creating a Panoramic Image
Creating the panoramic image
What if the images are at an angle to each other?
Summary
6. Seam Carving
How does it work?
How do we define "interesting"?
How do we compute the seams?
Can we expand an image?
Can we remove an object completely?
Summary
7. Detecting Shapes and Segmenting an Image
Approximating a contour
Identifying the pizza with the slice taken out
How to censor a shape?
What is image segmentation?
Watershed algorithm
Summary
8. Object Tracking
Colorspace based tracking
Building an interactive object tracker
Feature based tracking
Background subtraction
Summary
9. Object Recognition
What is a dense feature detector?
What is a visual dictionary?
What is supervised and unsupervised learning?
What are Support Vector Machines?
How do we actually implement this?
Summary
10. Stereo Vision and 3D Reconstruction
What is epipolar geometry?
Building the 3D map
Summary
11. Augmented Reality
What does an augmented reality system look like?
Geometric transformations for augmented reality
What is pose estimation?
How to track planar objects?
How to augment our reality?
Let's add some movements
Summary
3. Module 3
1. Fun with Filters
Creating a black-and-white pencil sketch
Generating a warming/cooling filter
Cartoonizing an image
Putting it all together
Summary
2. Hand Gesture Recognition Using a Kinect Depth Sensor
Setting up the app
Tracking hand gestures in real time
Hand region segmentation
Hand shape analysis
Hand gesture recognition
Summary
3. Finding Objects via Feature Matching and Perspective Transforms
Planning the app
Setting up the app
The process flow
Feature extraction
Feature matching
Feature tracking
Seeing the algorithm in action
Summary
4. 3D Scene Reconstruction Using Structure from Motion
Camera calibration
Setting up the app
Estimating the camera motion from a pair of images
Reconstructing the scene
3D point cloud visualization
Summary
5. Tracking Visually Salient Objects
Setting up the app
Visual saliency
Mean-shift tracking
Putting it all together
Summary
6. Learning to Recognize Traffic Signs
Supervised learning
The GTSRB dataset
Feature extraction
Support Vector Machine
Putting it all together
Summary
7. Learning to Recognize Emotions on Faces
Face detection
Facial expression recognition
Putting it all together
Summary
A. Bibliography
Index
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