[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

20050629: IDV - McIDAS Area Files and Pixel Sampling

>From: Murphy Sean <address@hidden>
>Organization: US Navy
>Keywords: 200506291751.j5THpijo006824 IDV 

Hi Sean-

>Problem description:
>
>I have received some imagery of McIDAS Area files from SSEC and I am  
>using a local ADDE server with IDV.
>
>The image is 1670 lines x 3000 elements.  It will not render ANYTHING  
>if I load it in as is.  It will render if I decrease the pixel  
>sampling on the display control.

Do you get nothing (i.e. not even a grey image)?
What version of the IDV are you using?  This should be fixed
in the 1.2b2 version if not earlier.

>It will also render if I decrease the magnification by -2 on the data  
>source prior to load.

>I have a set of images around the same size and they all do the same  
>thing.
>
>I saw the grey image problem E-Mail, but was referring to the pixel  
>sampling and the OpenGL 1000 element bug E-Mail.

It's the same issue.

If you resample every other pixel (using pixel sampling or -2 mag),
you'll decrease the image size to 835x1500 which I'm guessing
fit's into your video card's texture size.

What kind of video card are you using?  Which version of Java
and Java3D are you using?  What platform are you trying this on?

Don Murray
NOTE: All email exchanges with Unidata User Support are recorded in the
Unidata inquiry tracking system and then made publicly available
through the web.  If you do not want to have your interactions made
available in this way, you must let us know in each email you send to us.