4-Band Rasters in MicroStation?

Re: 4-Band Rasters in MicroStation?

Pascal Cloutier — Fri, 13 Nov 2009 20:03:06 GMT

jsurlet,

Athens was the code name for MicroStation V8i. That version was released a year ago and we recently released MicroStation V8i (SELECTseries1).

MicroStation V8i supports JPEG 2000 rasters, but it does not support the 4 bands flavor. That is only available for IMG rasters like Mathieu pointed out.

Could you please specify what you would like to be increased in the current support of JPEG 2000 files? Anything other than supporting the 4 bands flavor? I will file a CR based on your requests.

Thanks,

Pascal

Re: 4-Band Rasters in MicroStation?

jsurlet — Fri, 13 Nov 2009 19:30:44 GMT

So does this mean that JP2 will only be available in Athens releases??

Re: 4-Band Rasters in MicroStation?

Mathieu St-pierre — Sat, 01 Nov 2008 02:43:53 GMT

Hi Kim,

Below are some answers to your questions :

"Is RGB Alpha the same thing as RGB+Infrared?"

No. The alpha information specify the opacity of the pixels. This is this information that is used to give a transparency effect to the image.

RGB+infrared images are multispectral images. Multispectral images differ from convertional images as they contained measurement from non-visible light (in that case infrared light or radiation).

"If a raster has 4 bands, can you adjust which ones are displayed and what color is assigned to each in MicroStation?"

In Athens, you will be able to do that with the raster configuration variable MS_RASTER_IMG_CHANNELS but only for Erdas IMG images, not with JPEG 2000 or any other file formats.

"What about Descartes?"

Descartes doesn't support multispectral imagery.

Note that Microstation doesn't supports JPEG 2000 image in RGB Alpha mode. This was a mistake that has been corrected in the Microstation Athens documentation.

Thanks,

Mathieu