Re: Multi-Touch Screen Monitors

Subject: Re: Multi-Touch Screen Monitors
From: Kenneth Newby (
Date: Wed Oct 26 2005 - 12:45:19 EDT

Anyone who programs much in MaxMSP or many other graphics programs are
used to the practice of nudging with single pixel accuracy. I
personally found the low resolution of the (now defunct?) Tactex touch
pad to be a severe limitation to its usefulness for detailed gestural
or higher resolution purposes.


On 26-Oct-05, at 7:57 AM, Richard Wentk wrote:

> At 15:41 26/10/2005, you wrote:
>> My mouse pointer is two pixels by two pixels, my finger is 38 by 51
>> (give or take a couple of years). It's possibly a hammer replacing a
>> jeweler's screwdriver.
> It's not impossibly hard to add movement analysis and intrapolation to
> get a more-or-less single pixel fix from a blobby finger.
> Also if the cursor is being used to control a slider or dial, you only
> need enough precision to make the movement feel natural. (Which is
> what the Lemur does. The Lemur's physical touch resolution is much
> lower than the pixel resolution of the display.)
> In practice you hardly ever, if at all, need pixel-accurate two-axis
> location from an on-screen cursor. Usually you can quantise it to some
> near-enough variant that matches the controls or information on the
> display.
> Richard
Kenneth Newby Computational Poetics
School for Interactive Arts & Technology
Simon Fraser University
Integrated Media - Emily Carr Institute
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