width = img.dimension(0) # same as imp.getWidth()
height = img.dimension(1) # same as imp.getHeight()
# from half an image beyond 0,0 (to the left and up) to half an image beyond width,height
imgExtended = Views.interval(extendedView, [-width / 2, -height / 2],
[width + width / 2 - 1, height + height / 2 - 1
]) # RandomAccessibleInterval
IL.show(imgExtended, "enlarged canvas with extended mirror symmetry")
# The viewing interval doesn't have to overlap with the interval where the original image is defined
# For example:
imgSomewhere = Views.interval(extendedView, [41000, 60000], [42000, 61000])
IL.show(imgSomewhere, "Arbitrary interval somewhere")
# Other forms of extended views:
extendedEmptyView = Views.extendZero(img)
extendedValueView = Views.extendValue(img, 50)
# Find out the pixel type and its min and max values
t = img.randomAccess().get()
min_value = t.getMinValue() # minimum value for the pixel type
max_value = t.getMaxValue() # maximum
extendedRandomView = Views.extendRandom(img, min_value, max_value)
imgExtRandom = Views.interval(extendedRandomView, [-width / 2, -height / 2],
[width + width / 2, height + height / 2])
IL.show(imgExtRandom, "extended with random noise")
