Posted By
IstvanV
on 2008-02-11
05:52:23
|  Re: plus4emu 1.2.5.1
Luca: there is a new 1.2.5.2 update available now, which includes a preliminary implementation of conversion to the Multi Botticelli format. Currently, it has two main disadvantages: it is based on the multicolor FLI code, so it pre-dithers the image to 160x200/121 colors first, and then converts it to the Plus/4 format; this method works well for FLI because the error can be sufficiently low, but with this very limited format, finding an optimal palette first (with the subsequent dithering taken into account - that would be the difficult part), and then doing the conversion with dithering would be better. Another disadvantage is that since the search for optimal attributes is almost brute force, it can be very slow with some more complex images. However, both the speed and the quality are reasonably good when converting a greyscale image (by setting the color saturation to zero); this speedup can also be useful when finding the best image scale, offset, contrast, etc., before doing the final conversion with colors enabled.
To save a Botticelli compatible PRG file, enable the 'Write the raw FLI data only' option, and also make sure that compression is disabled.
|
