Re: gEDA-user: GerberViewr gerbv

[Steven Michalske <smichalske@xxxxxxxxx>]

wouldn't the pick and place files offer the same information with out  
having to OCR and not depend on that part having silkscreen?

I see at least two issues with silk screen OCR:
- requiring silk to for that component
- having the silk not be at the location of the part.
	- back side, or in a group off to the side.

gerbv already parses the XY files that PCB produces,  So it is just up  
to you to make a patch, or find some one to do it for you, to add a  
list of components and locations.  This list when searched through or  
clicked on would cause that area to be brought up.

happy hacking

Hardkrash


On Nov 3, 2008, at 11:05 AM, Joerg wrote:

> Stuart Brorson wrote:
>>>>> Now if one could combine the OCR capabilities of some other Linux
>>>>> programs with gerbv that would be really sweet ...
>>>> Pardon my ignorance, but exactly what featureset are you  
>>>> describing by
>>>> "OCR capabilities", and what would you like to see gerbv do?
>>>>
>>> P.S.: What I wrote in the previous post applies even more if you are
>>> asked to check someone else's layout. Often all you can use is the
>>> Gerber file set because that person has used a CAD program you do  
>>> not
>>> have at your disposal.
>>
>> Thanks.
>>
>> Several months ago, another feature request appeared for gerbv.  In
>> that case, there was interest in finding the centriod of each part by
>> doing a pattern match on the top and bottom metal layers, locating
>> footprints which looked like common footprints, and then outputting
>> the location of each footprint's centriod.  This is a similar pattern
>> match functionality, except this is to find the location of refdeses
>> on the silk layers.  The desire is similar:  You have a set of  
>> Gerbers
>> from some 3rd party tool, and you need to find where parts lie.
>>
>
> Probably they need that for programming pick&place machines. But this
> would also require orientation, not just the center.
>
> With refdeses it doesn't have to be precise, as long as it gets you  
> into
> the vicinity. But the OCR would have to be able to handle bit map text
> and vector text. Another challenge are dense layouts where, for  
> example,
> a part outline can butt up against the refdes on any given side. That
> throws OCR quite a curve.
>
>
>> So, ummmm, any ideas how much one would have to pay in order to get
>> this type of functionality from a commercial CAD tool?  CAM350 and
>> Valor come to mind, but I don't know if they support this feature.
>> Also, if they do, they're really expensive.  Do any of the low end
>> Gerber tools support this feature?  Which ones?
>>
>> I have no agenda in asking.  Rather, I am just interested in knowing
>> what market niche this feature belongs to.
>>
>
> I can give you an exact price, it's $495 plus shipping and sales tax:
>
> http://www.graphicode.com/
>
> GCPreView is really good, I've used it a lot.
>
> -- 
> Regards, Joerg
>
> http://www.analogconsultants.com/
>
> "gmail" domain blocked because of excessive spam.
> Use another domain or send PM.
>
>
>
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