Raster Bands

http://edndoc.esri.com/arcsde/9.0/java_api/raster/useapi/rasterband.html

A raster dataset contains one or more layers called bands.
For example, a color image has three bands (red, green, and blue),
a digital elevation model (DEM) has one band (holding elevation values),
and a multispectral image may have many bands.

我沒把setSamples搞懂就用了。
在彩圖針對顏色修改band 0表R ，band 1表G，band 2表B。
binary image裡band 0表B，1表W。