Re: TBitmap - how to copy an "object"

thanks, right thats what i want to do,
but i have no idea how translate this
into delphi code, i thought abt. a TList
to handle this, but i failed - i also
searched with google for hours, no usefull results :(


"Maarten Wiltink" <maarten@xxxxxxxxxxxxxxxxxx> schrieb im Newsbeitrag
news:4270dd30$0$169$e4fe514c@xxxxxxxxxxxxxxxxx
> "Peter Bauer" <PeterBauer@xxxxxxxx> wrote in message
> news:4270c4d2$0$17551$9b622d9e@xxxxxxxxxxxxxxxxxx
>
>> i'm trying to copy an "object" of one color out of a TBitmap,
>> the problem i got is that i dont know when a pixel belongs to
>> this object when the image contains more then one objects. it's
>> also not possible to split the image, cause the objects are not
>> seperated well.
>
> I'll take a step back if you'll allow me, and solve one problem
> at a time. Am I correct in describing the first problem as finding
> a connected, single-colour area?
>
> If you know where to start, you can search outwards in all directions
> from the starting pixel, adding neighbouring pixels to your region
> if they are still the same colour. It's easy to program as a
> recursive algorithm; it's essentially a flood fill. Thinking back,
> stack depth was a problem but this was in 1990 or so, still on a 16
> bit platform.
>
> Groetjes,
> Maarten Wiltink
>
>


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