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-rw-r--r--utils/raspberrypi/ctt/ctt_alsc.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/utils/raspberrypi/ctt/ctt_alsc.py b/utils/raspberrypi/ctt/ctt_alsc.py
index c0ba7b63..e51d6931 100644
--- a/utils/raspberrypi/ctt/ctt_alsc.py
+++ b/utils/raspberrypi/ctt/ctt_alsc.py
@@ -132,7 +132,7 @@ def alsc(Cam, Img, do_alsc_colour, plot=False):
"""
average the green channels into one
"""
- av_ch_g = np.mean((channels[1:2]), axis=0)
+ av_ch_g = np.mean((channels[1:3]), axis=0)
if do_alsc_colour:
"""
obtain 16x12 grid of intensities for each channel and subtract black level