[instaviz-users] Recog 1.0.2

[José Castro]

While I'm pointing a few issues, let me first say: good job :-)

Now... the first pattern I drew was a square, which was identified as a
rectangle, and I've just drawn a triangle which was identified as an ellipse
:-) There was also one of my squares which was identified as a circle... But
it was a square :-) I don't draw *that* bad... :-)

I think it's only guessing about 60-70% of what I'm drawing right now, and
I'm not being picky, honest (but hey, 60-70% is still great).

Perhaps a recognition application that would allow us to send you feedback
when the shape had been recognized as something else would be helpful here?
(and maybe also send feedback of properly recognized shapes, if that's
useful for regression testing)

Also, in the cases it guesses what I draw, I'm really curious as to the size
and position it would draw it in :-) I can't wait to see that :-)

Keep it up, :-)

jac


On Mon, Oct 6, 2008 at 4:31 AM, Glen Low <glen.low at pixelglow.com> wrote:

> Juan, All
>
> On 05/10/2008, at 6:12 PM, Juan Antonio Navarro Pérez wrote:
>
> > * When you purposefully draw incoherent shapes, or just random
> > strokes, shapes tend to be accepted as ellipse or diamond. I don't
> > know what should be better, perhaps to let the user know that the
> > shape was not recognized as a valid shape?
>
> I experimented with a version that returned "unknown" when the
> probability is below a certain threshold, but Recog became more fussy
> about getting the shapes right. On the balance of things I'll have to
> see how it goes with the flow of the final Instaviz app -- it might be
> easier to cancel out of a wrongly recognized shape than deal with the
> occasional dialog box asking for a confirmation and/or frustrating the
> user with no shape being drawn.
> >
> >
> > * I'm guessing that the most popular shapes will be squares and
> > circles. When I try to draw them, most of the times they're recognized
> > appropriately, but there are a few cases in which they end up being
> > recognized as rectangle or ellipse. Would it be a good idea to skew
> > the recognizer so that it tends to detect mostly squares and circles,
> > and only detect a rectangle/ellipse if the shape is really thin?
>
> Actually according to the few Graphviz stats I've been gathering, the
> most popular shape is the ellipse, which is the default shape in any
> case. I'd suspect ellipses and rectangles are more popular since you
> can put more text into them.
> >
> >
> > * Finally, I've found an interesting "bug" in the recognizer. When you
> > draw a square with the following strokes: down, right, up, left, down
> > (i.e. the last/first side is drawn twice), then the square tends to be
> > recognized as an ellipse. I'm guessing ellipses tend to have more
> > overlapping when drawing than squares. Anyway, I don't know how much
> > people would draw a "double side" like that in real life. (I know I
> > didn't when providing data with the previous Guesstur app).
>
> Hmm... the recognizer tends to be thrown off when you use more strokes
> than the shape in question (e.g. doubling strokes or overlapping
> strokes), and also if you use less strokes (e.g. drawing an incomplete
> rectangle). Does this bother any of you?
>
>
>
>
> Cheers, Glen Low
>
>
> ---
> pixelglow software | simply brilliant stuff
> www.pixelglow.com
> aim: pixglen
>
> _______________________________________________
> instaviz-users mailing list
> instaviz-users at pixelglow.com
> http://lists.pixelglow.com/listinfo/instaviz-users
>



-- 
José Castro
<http://jose-castro.org/>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman-mail5.webfaction.com/private/instaviz-users/attachments/20081006/aa35f48b/attachment.html