Help needed with ImagesPlus: Calibration Problem

[1ponders] (Paul) · #1 13-08-2006, 12:50 PM

I'm having problems calibrating my images when using flats. Using just darks I get image 1. When I include the flats I took this morning I get image 2. I haven't had this problem using flats before. So I'm thinking that I've mucked something in the capturing of the flats. Image 3 contains the details of 1 of the flats

Details:
Canon 300D; Darks 60 sec @ ISO800. Raw. Flats 1/400 sec @ISO800 Raw. Both Darks and Flats Average Combined to create a master Dark and Flat.

JohnG (John) · #2 13-08-2006, 01:21 PM

Paul

Did you use the Automatic Image Set Processing?

JohnG

[1ponders] (Paul) · #3 13-08-2006, 01:33 PM

No all manual John. I'm yet to discover Automatic Image Set Processing

RB (Andrew) · #4 13-08-2006, 01:40 PM

I had the exact same problem Paul and was wondering how/why that happened.

JohnG (John) · #5 13-08-2006, 01:41 PM

In 2.75, under File in the top left, scroll down to Automatic Image Set Processing, in the box that opens, just load your Lights, Darks, Bias and Flats and hit go (Process) all the work is done for you.

Did you accidently mix a flat and dark together, I had a rather bizzare result when I did that.

JohnG

[1ponders] (Paul) · #6 13-08-2006, 01:54 PM

I really don't know what I did John. I've never had a problem before. I've gone back over it a number of times and always come up with the same result. Frustrating. I'll give the Automated a go and see how things turn out. Thanks for the tip.

JohnG (John) · #7 13-08-2006, 02:02 PM

What I did was to make separate folders for my Lights, Darks, Bias and Flats, I put the shots in there idividual folders, that way there is no mixup. You just load each part of the set into the Auto Image Process, all your files are then kept separate and you can then rename your Master Dark, Bias or Flat to suit your exposure and keep them for future use if required.

Almost foolproof.

JohnG

[1ponders] (Paul) · #8 13-08-2006, 02:08 PM

That is pretty much my standard process. I initially set a date folder download from the card to there. Then each different object gets a master folder eg neptune, then in that folder I have Darks, Lights and Flats. I then use canons File Viewer Utility to check the frames for object/image type, ISO, exposure length and transfer to its appropriate folder. This is why I'm so stumped. I've checked each image/light/dark/flat and they are all where they are supposed to be.

JohnG (John) · #9 13-08-2006, 02:15 PM

It is rather bizzare that Flat Frame, everything seems OK in the details, mine normally end up a very pale blue, taken with a white T-shirt over the lens and against a blue sky as far from the sun as I can get.

Weird, you might need to retake them and reprocess, try the Auto Image Set Processing.

JohnG

[1ponders] (Paul) · #10 13-08-2006, 02:28 PM

I started the AISP and a couple of min I got an calibration error message. So I thought I'd delete the flats and reload them from the card. One of the images wouldn't delete, so I'm suspecting the file might be corrupted somehow.

JohnG (John) · #11 13-08-2006, 02:32 PM

I get an error message if you try to load any file that is not a CR2 file (RAW), could be the problem.

The boys are rather naughty today in the V8's. lol

JohnG

[1ponders] (Paul) · #12 13-08-2006, 02:37 PM

Mine are 300D CR files but that shouldn't make a difference. When I get home I'll reload from the camera card and start from scratch and then see how I go.