Ticket #195 (closed defect: fixed)

Currently, ImageTools throws an exception when you attempt to create a two-channel image (blank or not). For example, both of the following calls fail with an exception.

ImageTools.blankImage(400, 300, 2, FormatTools.UINT8);
ImageTools.makeImage(new byte[2][400 * 300], 400, 300);

The problem is essentially that the sRGB color space requires three color components. One possible solution might be to use the grayscale color space with an alpha channel, but that's a pretty lame hack. Alternately, we could figure out how to construct our own color space (though my initial efforts to do so failed). Or maybe there is an easier workaround to the problem. At the least, if we cannot find a solution, we should throw IllegalArgumentException within ImageTools if a channel count of two is given as a parameter directly or indirectly.