Computer Vision is a field related to artificial intelligence allowing the analysis and understanding of the image by an acquisition system such as a camera or more generally, a sensor.
In today's world where we are looking for autonomous systems that can understand and evolve in any environment, this field has become one of the most active areas of artificial intelligence research with impact in as many diverse fields. We can cite, for example, the development of intelligent vehicles (and drones) carried by Google and many car companies (PSA, Audi, Tesla, ...), medical imaging (decision support, biomedical instrumentation), the recognition of handwriting or deep experimental analysis of scientific experiments (fundamental physic, simulations, ...).
For this last area, there are some diversified projects like Astronometry or LSST project to automatically detect celestial body or Varcity, a project from ETH Zurich to create a simulation of dynamic cities containing events and traffic flow from image. Beyond technological innovation, this field has an important impact on how we interact with technology by stimulating decision support for our everyday actions such as locating a place with a photo, restaurant classification or just evaluate the filling status of a refrigerator for example.
In the context of this challenge, we will study one of the problems of this field that is image classification. This problem is recurrent because at the base of any problem of decision, specially for intelligent vehicules. Indeed, the initial step (before evaluating any action) is to understand and evaluate the evolution environment of the system. Therefore, it is essential to understand the specificities and difficulties of this problem. To illustrate this problematic, we chose autonomous vehicules context and we propose you to study the image source CIFAR-10.
This dataset contains groups entities that can interact with the vehicle environment like animals( cat, horse, dog, ...) and vehicles (bike, car, truck, ...). This approach will allow you to get acquainted with the fundamental notions of this field of application and will initiate you to the best practices and methodologies to use in the general context of machine learning.
To contact us: firstname.lastname@example.org
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The problem is a multiclass classification problem. Each sample (an image) is characterized by 256 features obtained by a Convonlution Neural Network (CNN). You must recognized what is on the picture.
You are given for training a data matrix X_train of dimension num_training_samples x num_features and an array y_train of labels of dimension num_training_samples. You must train a model which predicts the labels for two test matrices X_valid and X_test.
To prepare your submission, remember to use predict_proba, which provides a matrix of prediction scores scaled between 0 and 1. The dimension of the matrix is 1 x num_classes. Each line represents the probabilities of class membership, which sum up to one. Preparing your submission with the starting kit is the easiest.
There are 2 phases:
This sample competition allows you to submit either:
The submissions are evaluated using the bac_multiclass metric. This metric computes the balanced accuracy (that is the average of the per class accuracies). The metric is re-scaled linearly between 0 and 1, 0 corresponding to a random guess and 1 to perfect predictions.
Submissions must be made before the end of phase 1. You may submit 5 submissions every day and 100 in total.
This challenge is governed by the general ChaLearn contest rules.
This competition is organized solely for test purposes. No prizes will be awarded.
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Start: Oct. 22, 2017, 6:53 p.m.
Description: Development phase: create models and submit them or directly submit results on validation and/or test data; feed-back are provided on the validation set only.
Start: April 30, 2018, 6:53 p.m.
Description: Final phase: submissions from the previous phase are automatically cloned and used to compute the final score. The results on the test set will be revealed when the organizers make them available.
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