Hello Folks,

I have trouble getting images in Canon RAW format using KSTARS on a virtual machine and Indiserver running on a Ubuntu Mate Raspi. Telescope control and guiding cam (qhy5-II) work ok so far, getting images as jpeg using gphoto works, too.

Trying to get RAWs from an EOS 6D gives an error message as follows:

2015-07-18T09:26:44: Driver indi_gphoto_ccd: read_ppm: Expected (5472 x 3648) but image is actually (5496 x 3670)

Trying with an EOS 1100D leads to the same message (different image size values, of course).

Using gphoto2 directly like this
"gphoto2 --set-config eosremoterelease=Immediate --wait-event=1s --set-config eosremoterelease=4 --wait-event-and-download=2s --filename=shot.%C --force-overwrite"
works perfect for both cameras when I set them to BULB-Mode.
As said, jpeg download works fine, but when I change the image format to RAW, I get the error mentioned. Any idea whats going wrong?

Thanks in advance,

Peter

dcraw might return incorrect results. Try to run in your Raspberry PI:

On your RAW image and post what results you get. For Raspberry PI, I made it use "Thumb size" since this is by far the actual size, but I guess it could lead to issues with some camera models.

Here the result for canon eos 6d:

Filename: shot.cr2
Timestamp: Sat Jul 18 13:25:35 2015
Camera: Canon EOS 6D
ISO speed: 400
Shutter: 1/1.1 sec
Aperture: f/5.7
Focal length: 24.0 mm
Embedded ICC profile: no
Number of raw images: 1
Thumb size: 5472 x 3648
Full size: 5568 x 3708
Image size: 5496 x 3670
Output size: 5496 x 3670
Raw colors: 3
Filter pattern: RGGBRGGBRGGBRGGB
Daylight multipliers: 2.093140 0.943072 1.341524
Camera multipliers: 2032.000000 1024.000000 1705.000000 1024.000000

...and 1100D:

Filename: shot.cr2
Timestamp: Sat Jul 18 13:41:41 2015
Camera: Canon EOS 1100D
ISO speed: 200
Shutter: 1.0 sec
Aperture: f/inf
Focal length: 50.0 mm
Embedded ICC profile: no
Number of raw images: 1
Thumb size: 4272 x 2848
Full size: 4352 x 2874
Image size: 4290 x 2856
Output size: 4290 x 2856
Raw colors: 3
Filter pattern: RGGBRGGBRGGBRGGB
Daylight multipliers: 2.353782 0.931874 1.178846
Camera multipliers: 2289.000000 1024.000000 1529.000000 1024.000000

Peter

and what is your actual image size?

Canon Digital Photo Professional states the values given in Thumb Size as image size. Converting CR2 images to jpeg or bmp results into pixel sizes equal to thumb size.
So the actual image size is thumb size. Hope I got your question right.

Well, if you open EOS 6d shot.cr2 in any imaging application, you get (5472 x 3648) or (5496 x 3670)? Because the INDI GPhoto driver under Raspberry PI takes the "Thumb size" as the final size for RAW images (first value) but it seems the actual value is the secondary value.

I tried windows photo viewer and the picture viewer shipped with ubuntu. In all cases and for both cameras I get the thumb size as actual (pixel) size. I never got full size or image/output size as actual picture size. The thumb size is also equal to the official resolution stated by canon. So I have no clue how image size & output size are calculated.

I don't know if it helps. Attached the output from "exiftool -All" on an EOS 6D CR2 file.

Ok it seems the problem is with DCRaw on raspberry PI, Jensen found the solution long ago here:

indilib.org/forum/ccds-dslrs/644-wrong-i...pi.html?start=6#3509

I fear this is not the solution desired.

After upgrading dcraw to latest version 9.26 using the source code form the dcraw archive page I got the same results / errors. File sizes shown by dcraw remain the same. The thread where Jensen presented a solution is called "Wrong image size from GPhoto (Canon 1100D) on RPi", but infact the camera he used is an EOS 600D.
A brief look on the dcraw source code shows that EOS 600D raw files are handled in a special way (Looks like a quick patch). This might explain why it works for Jensen.
I'd like to play around with the indi_gphoto_ccd driver in order to find a solution, but there seems to be a problem to access the SVN repository. I downloaded a copy from launchpad.net, but cmake complains about missing packages. My linux skills are quite limited, so I got stuck at this point. Since I am busy the for next 5 days I will go ahead trying next week.

Sourceforge has been down for a few days now so all subversion stuff are not working. Please give it sometime until they restore services.

Hi there,
since I got my Raspberry I face the same problem. I built everything from latest source and I get the same error in Ekos:
I did on the raspberry:
and draw shows the image as:
EDIT: the hint from indilib.org/forum/ccds-dslrs/644-wrong-i...pi.html?start=6#3509 was involved without success

Iam not very in the coding thing but it looks like "read_ppm: Expected (5184 x 3456)" is taken from the Thumb size which is the non-dcraw'ed / non linux / camera internal / official dimension. The "actually (5208 x 3476)" is the real dcraw processed pixels I allwaysI get on Linux and its bigger because:But I really dont know whats the matter here.