Hello, this issue is about how overlaying of maps is done. The idea of overlaying maps is great in general, a big improvement compared to qlk, I really love it. But the merged map views currently tend to look nebulous, lacking contrast and color.
Here is an example: https://github.com/michael-heerdegen/qms-image-quality-examples/blob/master/original.png?raw=true This is openmtbmap + Google Maps Aerial + DEM shading. It looks greyish. I tried to optimize the result by changing the order and opacity of the maps, but it wont get much better than this if all involved maps have to be recognizable. Here is how the same image looks like after doing an "auto level correction" with Pinta (a graphics program like Gimp): https://github.com/michael-heerdegen/qms-image-quality-examples/blob/master/pinta-auto-level.png?raw=true and here is a version were I just increased contrast + color a bit: https://github.com/michael-heerdegen/qms-image-quality-examples/blob/master/increase-contrast+color.png?raw=true The point is not only that the resulting images look nicer. All *involved maps* are better recognizable: the labels from openmtbmap are better readable; the Google Aerial photo background looks more naturally, and the 3D effect from DEM shading is better. That suggests that the algorithm of how maps are overlaid can be improved. I don't know much about image processing sadly, but there are three approaches possible I think: - use a different formula for merging the images, however that might look like - do post-processing to improve the image quality. MMh, better than nothing - consider some parts of maps as transparent. For example, don't merge the background color of vector maps. For DEM shading, don't treat it like a translucent layer, but manipulate color values of the map view directly; e.g. darken pixels when there is a shading, according to the amount of shading, leave pixels as they are if there is no shading at that point. What do you think? Thanks, Michael. ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Qlandkartegt-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users
