A trivial python script that takes an input image and outputs a "copy", with all values set to the first pixel value.

ij_test.py

#@ OpService ops
#@ ImgPlus image
#@OUTPUT ImgPlus copy
#@OUTPUT Integer a

a = 21
copy = ops.copy().img(image.getImg())
c = copy.cursor()
c.fwd()
v = c.get().copy()

while (c.hasNext()) {
	c.fwd()
	c.get().set(v)
}