During my presentation "Machine Learning Empowered by Python", I have created a real-time digit recognition demo. In order to make the system more robust, I had to manually extract features from images and train my system. Is there any algo the discover the best set of feature from raw data and class information?

During my presentation "Machine Learning Empowered by Python", I have created a real-time digit recognition demo. In order to make the system more robust, I had to manually extract features from images and train my system. Is there any algo the discover the best set of feature features from raw data and class information?

During my presentation "Machine Learning Empowered by Python", Python", I have created a real-time digit recognition demo. In order to make the system more robust, I had to manually extract features from images and train my system. system.

Is there any algo the algorithm to discover the best set of features from raw data and class information?