DN599914387

Subject: raw image display - ideas? - DN [1]

Adrian Schubert <schubert@rsl.geo.unizh.ch> - 20 Mar 2000 - comp.lang.tcl

 Hello,

 I'd like your opinions on how easy/difficult it would be to
 build an image-visualisation application that would:

 - read in raw (no headers, just values) images of say,
    float or short int values and display the image
 - basic zooming
 - mouse-click value extraction for individual pixels
 ** multi-platform compatibility ** (LINUX, UNIX, WINDOWS 98-2000)

 In other words your basic image display program for non-standard
 images (*not* JPEG, GIF, BMP etc.). Converting existing files to
 standard formats is not practical since files that we use here
 are typically 100 to 500 Megs and we don't want too many
 copies!

 The 'image' command seems only to do standard formats, and while
 the C-interface provides flexibility I'm imagining (without having
 looked too deeply into it) that this would fly against the platform
 compatibility requirement. The whole C-interface is about
 writing C-programs, isn't it? I'm hoping it's possible to have some
 sort of tcl-tk executable that I could just transport between platforms.

 Can anybody give me their off-the-top-of-their-heads ideas
 on whether tcl-tk can do this, and if so, give me a hint or two
 on where to look for documentation, what commands are involved,
 etc.?

 Thanks a lot people, Adrian

 --
 Adrian Schubert            | Remote Sensing Laboratories
 TEL: +41 +1 635-6523       | University of Zurich
 schubert@rsl.geo.unizh.ch  | Winterthurerstr. 190
 www.geo.unizh.ch/~schubert | CH-8057 Zurich, Switzerland