drawing tablet - extract coordinates

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Naama 2011-2-23

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https://ww2.mathworks.cn/matlabcentral/answers/1865-drawing-tablet-extract-coordinates

评论： Umar 2024-7-18

Hi,

I am trying to extract X Y drawing coordinates from a tablet (sort of touchscreen) that is connected to my computer using a USB connection. It is not a wacom tablet (so I can't use the great wintabmex functions). Does anyone have an idea on how to extract this data to matlab?

Thanks! Naama

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Walter Roberson 2011-2-23

What kind of tablet is it then?

I would hazard a guess that it creates a virtual serial port and communicates via serial -- that was a common design for non-USB tablets.

Umar 2024-7-18

Hi Naama,

Try using Psychtoolbox PsychHID functions because it will help you read the raw data from the tablet, including the X Y coordinates of the drawing. For more information PsychHID function, please refer to

http://psychtoolbox.org/docs/PsychHID-Devices

http://psychtoolbox.org/docs/GetTouchDeviceIndices

http://psychtoolbox.org/docs/PsychHID

Please let me know if you have any further questions.

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