img_2 = IL.wrapByte(im_2)
# get the fft parameters only once at the beginning because they will be te same for all calculations
extension, extSize, paddedDimensions, fftSize = getFFTParamsFromImps(
im_1,
im_2,
r1=Rectangle(0, 0, 8 + vertical_strip_width + 2, im_2.getHeight()),
r2=Rectangle(0, 0, vertical_strip_width, im_2.getHeight()))
# initializing list of subpixelshifts
spshifts = []
# sliding the small vertical band (which will be called view v2) pixel by pixel
# the start of the small vertical band in im_2 is start_of_sliding_band_in_im_2, renamed as "s"
s_range = range(
int(Math.ceil(end_of_im_1_in_im_2 - vertical_strip_width)))
for start_of_sliding_band_in_im_2 in s_range:
# for start_of_sliding_band_in_im_2 in range(30):
s = start_of_sliding_band_in_im_2
# extract view v1. Instead of looking for where the narrow band v2 fits in the entire im_1,
# we extract only a narrow band in im_1. We know that v2 will be found in v1.
# We take the narrow band 3 times wider than v2.
# the following is clear when looking at the schematic
start_of_v1_in_im_1 = im_1.getWidth() - (
int(round(end_of_im_1_in_im_2)) - s + 8)
r1 = Rectangle(start_of_v1_in_im_1, 0,
8 + vertical_strip_width + 2, im_2.getHeight())
v1 = getViewFromImglib2Im(img_1, r1)
