Drawing with touchscreen

draw
touch

asked 2016-09-27 07:46:42 -0600

j0h
106 ●4 ●7 ●13

Hello All, I have read the drawing tutorial, and understand how to do some basic drawing functions. I would like to draw using a touchscreen. There a library that can help me do that?

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answered 2016-09-27 09:58:51 -0600

kbarni

4134 ●1 ●13 ●49

Sorry, but drawing and touchscreen are not really computer vision topics...

Otherwise you won't really need any library. Touchscreen works basically as a mouse. So, using your favourite framework (Qt, MFC, Java...) put a bitmap control with a bitmap on the screen, a mouse callback (onMouse(x,y,event)), and on mouse button down event change the color of the current pixel of the bitmap.

This is possible even in OpenCV, but as I said, it wasn't created for this.