pattern recognition

[Kalash]

Hello everyone,
I would like to design a web platform for recognizing geometric shapes (square, rectangle, triangle ...), letter of the alphabet, number.
Please help me.plateforme de dessin.html

how can i make a user then draw in the planned area

[Ingolme]

You'll have to learn to use the Canvas API.

The simplest way to make a drawing application using canvas is to draw circles on each mousemove event while the mouse button is down, or on phones, using the touchstart, touchmove and touchend events.

Once you managed to make a simple drawing application, then comes the difficult part: writing software to recognize shapes. There is an entire field of science dedicated to solving this one problem, it is not an easy task. It seems neural networks are the most common approach to solving it.