I have created a mosaic dataset from some old scanned maps, which vary a lot in colour (different paper, ageing etc). When I zoom into the mosaic, it looks fine and the colour of the tiles appears to be similar to the orignal jpeg file. However, I want to view the data at more scales - if I zoom out, I just end up with the wireframe. When I create overviews, the colour of each tile changes, so much so that it is not possible to read the data.
Is it possible to get the overview to use the colour settings from the original jpegs? If this cannot be done, how can I make the tiles show at all scales - I know this would be really slow but I am planning on caching it anyway.
Many thanks in avance for your advice.