I have a number of effects that include colour level shifting, vignette, blur, noise and some others. I have combined these into "Lens", "Film" and "Processing" effects which all have their own tweakable parameters. I think this gives a reasonable level of control to the user without being either too restrictive or too low-level.

I must admit I hadn't got as far as thinking about things like random selection when you take a photo but that is an excellent idea. I'll definitely include that.

In fact, if anyone else has any requests or ideas for either the camera application or the offline photo tool (which I currently call "Classic Print") then please let me know!

Thanks for your kind words! I'm really enjoying writing this app. I started writing it because I wanted to learn more about development using Qt, gstreamer and various other libraries. It's an added bonus that there is some excitement from the community about it!