You could write a small app just to do the processing (or use a web server with an lc script to process) break it into chunks, and spawn processes/server requests to offload the work maybe. Though imagemagick would be a pretty awesome solution if it can be made to do what you need.
On Sat, Mar 18, 2017 at 4:02 PM, Jonathan Lynch via use-livecode < email@example.com> wrote: > You could put the entire ImageMagick set of files into custom properties, > then, when your app first opens, look to see if ImageMagick is present. If > not, then have your app save the ImageMagick files in the same folder as > your app. > > I have done that sort of thing before - big files, but works fine. > > If you can find a Javascipt library that does what you need, your mission > would be easy :) > > Sent from my iPhone > > > On Mar 18, 2017, at 5:03 PM, jonathandly...@gmail.com wrote: > > > > With 10 million pixels, comparing 3 different base colors (RGB), and > checking both upper and lower bounds, that comes to 60 million comparisons. > That is an awful lot for a scripted environment. > > > > You would need to make an external (and, frankly, the LC instructions on > making desktop externals do not work for modern versions of LC and Visual > Studio). > > > > For a project, I was able to successfully use ImageMagick as a command > line image processor. It took a few seconds, but much better than what LC > took. > > > > ImageMagick is pretty flexible and might give you what you need. I was > using it for green screen image extractions. > > > > Sent from my iPhone > > > >> On Mar 18, 2017, at 2:20 PM, Peter Reid via use-livecode < > firstname.lastname@example.org> wrote: > >> > >> I've got an app that allows the user to display an image using a > variable number of colours (2-24 colours). In addition, the user can > specify upper and lower thresholds so that all pixels below a specified > value are displayed using a colour such as black and all pixels with values > above a specified value are displayed using a colour such as red. Pixels > with values between the thresholds are displayed using the specified colour > range of 2-24 colours. The images can consist of up to 8-10 million pixels, > they are rectangular and can be in a landscape or portrait orientation. > >> > >> Whilst I have this working the code that manages the changing of the > number and use of colours in an image is rather slow. This is despite me > using the "repeat for each" loop structure and lock the screen wherever > possible to get the maximum speed! > >> > >> Does anyone have any clever algorithms, code, add-ons, etc. that can do > this kind of thing in a flash?! > >> > >> Thanks > >> > >> Peter > >> -- > >> Peter Reid > >> Loughborough, UK > >> > >> > >> _______________________________________________ > >> use-livecode mailing list > >> email@example.com > >> Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > >> http://lists.runrev.com/mailman/listinfo/use-livecode > > _______________________________________________ > use-livecode mailing list > firstname.lastname@example.org > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode > _______________________________________________ use-livecode mailing list email@example.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode