reset()

ds= getDataSet(PWD+'baobab.jpg')
plot( 1, ds, 
         xpos='80%,90%', ypos='10%,30%', 
         xdrawTickLabels=False, ydrawTickLabels=False )
dom.plots[1].yaxis.visible=dom.plots[1].xaxis.visible=False
from org.autoplot.imagedatasource import ImageDataSourceFormat
hsv= ImageDataSourceFormat.fromRGBtoHSV( ds )

hue= hsv[:,:,0]
value=  hsv[:,:,2]

r= where( hue.gt(150).and( hue.lt(250) ).and(value.gt(20) ) )

ds= zeros( hsv.length(), hsv.length(0) )
ds[r]= 1
plot( 0, ds, colorTable='grayscale' )