Colour from Canon CR2 Files

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Graeme1858 Great Britain
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Colour from Canon CR2 Files

#1

Post by Graeme1858 »


I'm using a Canon 600D and pulling the CR2 files into DSS. My attempt at M27 this month has 40 x 30 second lights, 20 darks and 30 bias files. The original CR2 light files show colour in the Windows Explorer preview but after stacking and pulling the Autosave file into Gimp all colour has gone!

Anyone know of a good Gimp course? I've got 5 days till the TSS August monthly competition ends!

Regards

Graeme
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Re: Colour from Canon CR2 Files

#2

Post by Graeme1858 »


So I've watched some Youtube stuff, updated DSS, stacked my files again, saved the output as a Tiff and pulled the result into Gimp again. After stretching there is some colour but only just! And I think it's due to lack of data. There probably are some processing tricks I could use but I'm guessing I need to capture a bit more than 40 x 30 seconds.

Regards

Graeme
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Celestron 9.25 f10 SCT, f6.3FR, CGX mount.
ASI1600MM Pro, ASI294MC Pro, ASI224MC
ZWO EFW, ZWO OAG, ASI220MM Mini.
APM 11x70 ED APO Binoculars.

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andrewsscope Great Britain
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Re: Colour from Canon CR2 Files

#3

Post by andrewsscope »


Hi Graeme you should have some data from that amount of time.I don't know if you have looked at the histogram on the camera as it will show how much colour's are on the image.When I do my stacking in dss I don't using any darks,I just use the files I captured and seems to work each time.If it helps you can check the histogram on the image by using the display button and should come up with the channel's for each colour.They should give an indication if you have captured any colour within the image,hope this helps as I am still learning myself.
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Re: Colour from Canon CR2 Files

#4

Post by KathyNS »


I played a bit with the JPG file you posted. The colour is there, you just have to bring it out. In GIMP, the tool you want is called Saturation, found under the Colour menu. You have to crank it up a whole bunch, and you may have to do it several times. This is normal for astrophotos.

When we start out doing AP, we tend to concentrate on running the equipment. But most of the work is in the processing.
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Re: Colour from Canon CR2 Files

#5

Post by JayTee »


I've had this same problem with DSS while processing M27. I couldn't figure out what was going on or what I was doing wrong. Finally, in a desperate move, I made sure I had the latest edition of DSS then completely uninstalled then reinstalled DSS. For some unknown reason, this did the trick. I haven't had a problem with color since.

It's not a very glamorous fix, but it worked for me.

Cheers,
JT
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Re: Colour from Canon CR2 Files

#6

Post by Graeme1858 »


andrewsscope wrote: Mon Aug 26, 2019 10:13 am Hi Graeme you should have some data from that amount of time.I don't know if you have looked at the histogram on the camera as it will show how much colour's are on the image.When I do my stacking in dss I don't using any darks,I just use the files I captured and seems to work each time.If it helps you can check the histogram on the image by using the display button and should come up with the channel's for each colour.They should give an indication if you have captured any colour within the image,hope this helps as I am still learning myself.

Hello Andy, hope you're well.

I use APT with the 600D and it does display the histogram but I didn't really use it! Will do next time though, thanks.

Regards

Graeme
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Celestron 9.25 f10 SCT, f6.3FR, CGX mount.
ASI1600MM Pro, ASI294MC Pro, ASI224MC
ZWO EFW, ZWO OAG, ASI220MM Mini.
APM 11x70 ED APO Binoculars.

https://www.averywayobservatory.co.uk/
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Re: Colour from Canon CR2 Files

#7

Post by Graeme1858 »


KathyNS wrote: Mon Aug 26, 2019 11:11 am I played a bit with the JPG file you posted. The colour is there, you just have to bring it out. In GIMP, the tool you want is called Saturation, found under the Colour menu. You have to crank it up a whole bunch, and you may have to do it several times. This is normal for astrophotos.

When we start out doing AP, we tend to concentrate on running the equipment. But most of the work is in the processing.

Cheers Kathy

I'll have a play with the saturation tool as you suggest. Not tonight though, we're going out for a curry now!

Regards

Graeme
______________________________________________
Celestron 9.25 f10 SCT, f6.3FR, CGX mount.
ASI1600MM Pro, ASI294MC Pro, ASI224MC
ZWO EFW, ZWO OAG, ASI220MM Mini.
APM 11x70 ED APO Binoculars.

https://www.averywayobservatory.co.uk/
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Graeme1858 Great Britain
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Re: Colour from Canon CR2 Files

#8

Post by Graeme1858 »


JayTee wrote: Mon Aug 26, 2019 11:15 am I've had this same problem with DSS while processing M27. I couldn't figure out what was going on or what I was doing wrong. Finally, in a desperate move, I made sure I had the latest edition of DSS then completely uninstalled then reinstalled DSS. For some unknown reason, this did the trick. I haven't had a problem with color since.

It's not a very glamorous fix, but it worked for me.

Cheers,
JT

Thanks for that JT I try that if the saturation thing doesn't yield results.

Regards

Graeme
______________________________________________
Celestron 9.25 f10 SCT, f6.3FR, CGX mount.
ASI1600MM Pro, ASI294MC Pro, ASI224MC
ZWO EFW, ZWO OAG, ASI220MM Mini.
APM 11x70 ED APO Binoculars.

https://www.averywayobservatory.co.uk/
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