| Re: Regarding the Fit_Ellipse Program [message #58970 is a reply to message #58903] |
Tue, 26 February 2008 13:51   |
pgrigis
Messages: 436
Registered: September 2007
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Senior Member |
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plim.dream...@gmail.com wrote:
> So, I used contour to obtain the x and y positions of a certain
> contour level and labeled those arrays as posx and posy.
> then obtained the positions in terms of the device, because that is
> what polyfillv uses:
> D = convert_coord(posx,posy, /to_device)
>
>
> I did a print,!D.x_size to get the device sizes (it gave me the famous
> 17780) so I did:
This happens most likely because you are using the postscript device.
If you do set_plot,'X' or 'WIN', you should get more resonable values
for !D.x_size.
Ciao,
Paolo
> result = polyfillv(D(0,*),D(1,*),17780,17780)
> plots,fit_ellipse(result)
>
> It is unable to allocate memory for the fit_ellipse part.
> Is the !D.x_size related to the monitor size or the monitor resolution
> or the postscript resolution or non-of-the-above?
>
> And with the IDLanROI I finally made the object
> blob = OBJ_NEW( 'IDLanROI', posx, posy ) and have to say that I
> certainly was/am scared by wording such as: "Init methods are special
> life cycle methods..."!?
> I am right now trying to figure out how to type in this new language
> Result = Obj->[IDLanROI::]ComputeMask(
> to get from here to fitting an ellipse to the object and getting the
> semi-major and semi-minor axis.
>
> Much thanks,
> "Bruno Schmidt of Northern Florida State University"
>
> - so honey what did you do at work all day today?
> - oh, i drew an ellipse...
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