Example of my working fault. I think it was the project for counting passengers on the video which was shot in the buses. I had no additional sensors, only a picture from the camera. And it was hard to detect objects without the third dimension especially with a proposition that this algorithm must be integrated into devices in the future. I was trying to find a way to solve it and had developed the first prototype after half a year. But it demanded more resources than devices had had. So it had no future. I think I should have learned a little bit more about working with pattern recognition in the picture before I began to develop software. And I did it after, so it was my fault.