Originally posted by **simonleeADL** June 4, 2024
Hi there!
I've got a ZWO ASI533MM Pro set up (working at a University) and in the allsky setting I've chosen "RAW16" as the "Image Type" to capture the full 14 bits from the sensor. I've changed the "Filename" to "image.png", set the Quality / Compression to 9, but the output seems to be an RGB image with 8 bits per channel rather than a 16 bit monochrome image.
Have I missed something?
I've included an example image and part of the Level 4 debug below. It even says `BIT_DEPTH=16` in the log output so, I guess it's trying?
(I'm using the legacy overlay because I thought the modern overlay may be affecting the output format, but seemingly not)
```2024-06-05T01:05:02.255092+09:30 allsky allsky[26597]: > Saving NIGHT image 'image-20240605010404.png'
2024-06-05T01:05:08.469757+09:30 allsky allsky[26597]: > *****
2024-06-05T01:05:08.469972+09:30 allsky allsky[26597]: > Image took 6,212.0 ms to save (average 5,667.3 ms).
2024-06-05T01:05:08.470035+09:30 allsky allsky[26597]: > *****
2024-06-05T01:05:08.475060+09:30 allsky allsky[67197]: saveImage.sh NIGHT /home/allskycam/allsky/tmp/image-20240605010404.png DATE=20240605 TIME=010404 AUTOEXPOSURE=0 sAUTOEXPOSURE= EXPOSURE_US=1075613 sEXPOSURE=1.1 sec AUTOGAIN=1 sAUTOGAIN=(auto) GAIN=200 AUTOWB=0 sAUTOAWB= WBR=0 WBB=0 BRIGHTNESS=100 MEAN=86 FULLMEAN=30 TEMPERATURE_C=6 TEMPERATURE_F=43 BIN=1 FLIP=both BIT_DEPTH=16 DARKFRAME=0 eOVERLAY=0 AUTOUSB=1 USB=50
2024-06-05T01:05:46.924230+09:30 allsky allsky[67258]: INFO: Loading config /home/allskycam/allsky/config/settings.json
2024-06-05T01:05:46.925213+09:30 allsky allsky[67258]: INFO: Running night flow...
2024-06-05T01:05:46.925485+09:30 allsky allsky[67258]: INFO: ----------------------- Running Module allsky_loadimage.py -----------------------
2024-06-05T01:05:46.925564+09:30 allsky allsky[67258]: INFO: Attempting to load allsky_loadimage
2024-06-05T01:05:46.925621+09:30 allsky allsky[67258]: INFO: Image /home/allskycam/allsky/tmp/image-20240605010404.png Loaded
2024-06-05T01:05:46.925689+09:30 allsky allsky[67258]: INFO: Ignoring watchdog for module loadimage
2024-06-05T01:05:46.925753+09:30 allsky allsky[67258]: INFO: ----------------------- Running Module allsky_overlay.py -----------------------
2024-06-05T01:05:46.925799+09:30 allsky allsky[67258]: INFO: Attempting to load allsky_overlay
2024-06-05T01:05:46.925852+09:30 allsky allsky[67258]: INFO: External Overlay Disabled.
2024-06-05T01:05:46.925911+09:30 allsky allsky[67258]: INFO: Module allsky_overlay.py ran ok in 0.00s
2024-06-05T01:05:46.926007+09:30 allsky allsky[67258]: INFO: ----------------------- Running Module allsky_saveimage.py -----------------------
2024-06-05T01:05:46.926070+09:30 allsky allsky[67258]: INFO: Attempting to load allsky_saveimage
2024-06-05T01:05:46.926127+09:30 allsky allsky[67258]: INFO: Image /home/allskycam/allsky/tmp/image-20240605010404.png Saved, quality 9
2024-06-05T01:05:46.926183+09:30 allsky allsky[67258]: INFO: Ignoring watchdog for module saveimage
2024-06-05T01:05:46.926226+09:30 allsky allsky[67258]: INFO: night flow Complete...
2024-06-05T01:06:02.256361+09:30 allsky allsky[26597]: Executing sunwait poll exit angle -6.0000 34.9195S 138.60298E > /dev/null
2024-06-05T01:06:02.263150+09:30 allsky allsky[26597]: -----```
Discussed in https://github.com/AllskyTeam/allsky/discussions/3671