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algorithm

algorithms

Minimal examples of data structures and algorithms in Python

audio-visual-integration

Cognitive processes for interpreting audio-visual scenes

awesome-java-leetcode

:crown: LeetCode of algorithms with java solution(updating).

bashrc

Common usable configuration files for bash

depth_clustering

:taxi: Fast and robust clustering of point clouds generated with a Velodyne sensor.

emotion-detection-in-videos

The aim of this work is to recognize the six emotions (happiness, sadness, disgust, surprise, fear and anger) based on human facial expressions extracted from videos. To achieve this, we are considering people of different ethnicity, age and gender where each one of them reacts very different when they express their emotions. We collected a data set of 149 videos that included short videos from both, females and males, expressing each of the the emotions described before. The data set was built by students and each of them recorded a video expressing all the emotions with no directions or instructions at all. Some videos included more body parts than others. In other cases, videos have objects in the background an even different light setups. We wanted this to be as general as possible with no restrictions at all, so it could be a very good indicator of our main goal. The code detect_faces.py just detects faces from the video and we saved this video in the dimension 240x320. Using this algorithm creates shaky videos. Thus we then stabilized all videos. This can be done via a code or online free stabilizers are also available. After which we used the stabilized videos and ran it through code emotion_classification_videos_faces.py. in the code we developed a method to extract features based on histogram of dense optical flows (HOF) and we used a support vector machine (SVM) classifier to tackle the recognition problem. For each video at each frame we extracted optical flows. Optical flows measure the motion relative to an observer between two frames at each point of them. Therefore, at each point in the image you will have two values that describes the vector representing the motion between the two frames: the magnitude and the angle. In our case, since videos have a resolution of 240x320, each frame will have a feature descriptor of dimensions 240x320x2. So, the final video descriptor will have a dimension of #framesx240x320x2. In order to make a video comparable to other inputs (because inputs of different length will not be comparable with each other), we need to somehow find a way to summarize the video into a single descriptor. We achieve this by calculating a histogram of the optical flows. This is, separate the extracted flows into categories and count the number of flows for each category. In more details, we split the scene into a grid of s by s bins (10 in this case) in order to record the location of each feature, and then categorized the direction of the flow as one of the 8 different motion directions considered in this problem. After this, we count for each direction the number of flows occurring in each direction bin. Finally, we end up with an s by s by 8 bins descriptor per each frame. Now, the summarizing step for each video could be the average of the histograms in each grid (average pooling method) or we could just pick the maximum value of the histograms by grid throughout all the frames on a video (max pooling For the classification process, we used support vector machine (SVM) with a non linear kernel classifier, discussed in class, to recognize the new facial expressions. We also considered a Naïve Bayes classifier, but it is widely known that svm outperforms the last method in the computer vision field. A confusion matrix can be made to plot results better.

ext3dlbp

Extended three-dimensional rotation invariant local binary patterns (LBP)

fastfusion

Volumetric 3D Mapping in Real-Time on a CPU

hacker

python绝技:运用python成为顶级黑客 这本书的源码

holistic_scene_parsing

Code for ECCV 2018 paper - Holistic 3D Scene Parsing and Reconstruction from a Single RGB Image

homecredit

image-retrieval

image retrieval for my master thesis

indoorunderstanding_3dgp

The code implement the method described in the 3DGP paper published in CVPR13 (see README for full title).

interview_python

关于Python的面试题

java-interview

👨‍🎓 Java 相关知识点

jointboost

leetcode-solutions

My solutions for all (~350) leetcode problems, including premium.

lqp

Project for Training and Extracting Local Quantized Pattern Feature

mlalgorithms

Minimal and clean examples of machine learning algorithms

models

Models and examples built with TensorFlow

muduo

A C++ non-blocking network library for multi-threaded server in Linux

myvimrc

opencv_contrib

Repository for OpenCV's extra modules

openpose

OpenPose: A Real-Time Multi-Person Keypoint Detection And Multi-Threading C++ Library

orb_slam

A Versatile and Accurate Monocular SLAM

orb_slam2

Real-Time SLAM for Monocular, Stereo and RGB-D Cameras, with Loop Detection and Relocalization Capabilities

pycss

Curvature Scale Space in Python

python-doc

translate python documents to Chinese for convenient reference 简而言之，这里用来存放那些Python文档君们，并且尽力将其翻译成中文~~

python-gems

Beautifully constructed python scripts