Searching for python script islands to layers

[mich_lloid]

"get_pixel() is possibly somewhat faster than pdb.gimp_color_picker(img, layer, x, y, 0,0,0)"

Wow, drawable.get_pixel() is approximately 6,5 times faster than pdb.gimp_color_picker, thanks for pointing me to that.

the script looks like this now:

Code:

import time
img = gimp.image_list()[0]

def objects_to_layers(image, smp=10):
    time_start = time.time()
    img = image
    sample = smp
    counter = 1
    newlayer = pdb.gimp_layer_copy( img.active_layer, pdb.gimp_drawable_has_alpha( img.active_layer ) )
    img.add_layer(newlayer)
    for y in range(0, img.height , sample):
        for x in range(0, img.width, sample):
            #alphacheck = pdb.gimp_color_picker(img, img.active_layer, x, y, 0,0,0)
            alphacheck = img.active_layer.get_pixel(x,y)
            if alphacheck[-1] > 0:
                pdb.gimp_fuzzy_select(img.active_layer, x, y, 254.9 , 2,0,0, 0,0)
                src_layer = img.active_layer
                newlayer = pdb.gimp_layer_copy( img.active_layer, pdb.gimp_drawable_has_alpha( img.active_layer ) )
                img.add_layer(newlayer)
                _, x1, y1, x2, y2 = pdb.gimp_selection_bounds(img)
                newlayer.name = "Layer %03d (%d, %d, %d, %d)" % (counter, x1, y1, x2 - x1, y2 - y1)
                counter += 1
                pdb.gimp_layer_resize(img.active_layer, x2 - x1, y2 - y1, -x1, -y1)
                img.active_layer = src_layer
                pdb.gimp_edit_clear(src_layer)
    img.remove_layer(src_layer)
    time_end = time.time()
    print ('time taken: ' + str(time_end - time_start) + ' seconds.')

results as to speed with samples of 10, 5 and 1 pixels for a 1024x1024 image with 5 objects:
➤> objects_to_layers(img)
time taken: 2.11100006104 seconds.
➤> objects_to_layers(img, 5)
time taken: 7.57000017166 seconds.
➤> objects_to_layers(img, 1)
time taken: 181.577000141 seconds.

Also your script "Layer > Extract Objects > Extract objects to layers..." gives these results with holes as objects:

My script result:


I thought for a while that gimp crashed with samples of 1 pixels, that's how long it took.

I read that python's array module will get even faster results in Akkana Peck's blog: http://shallowsky.com/blog/gimp/pygimp-pixel-ops.html
How do I implement that into my script?