On 15.04.2014 18:24, Nick Ma. wrote:
I'm working on a plugin like "Tracer2"[1] but which should run
entirely embedded into JOSM.
Therefore I'm asking for the best way to access pixel color shown in
an active Layer[2] or ImageryLayer?
Like this (gets the pixels in the current view):
BufferedImage image = new BufferedImage(20, 30,
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = image.createGraphics();
g2.setClip(0, 0, 20, 30);
Main.map.mapView.paint(g2);
int col = image.getRGB(5,6);
The Layer class has a paint() method as well, if you just need one layer.
Why/Background/Next steps (that's not the question):
To execute an edge detection[3] algorithm with the image information
and auto detect the edges of an area currently displayed in JOSM.
Helping to faster create buildings.
The library ImageJ might be worth a look. It is pure Java and is
advertised as being fast.
Also lakewalker is another plugin that does a similar thing, but more
specialized.
Paul
_______________________________________________
josm-dev mailing list
josm-dev@openstreetmap.org
https://lists.openstreetmap.org/listinfo/josm-dev
