Matt,
Thanks for the kind comments.
Quote:
Originally Posted by winensky
Very very marked contrasts as one would expect at the terminator. Interesting that you are using 4 points as I often try and use twice that on DSOs, far fewer images to process.
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For DSO imaging, I use 3-5 stars in CCDStack. It does a very nice job aligning the images and I find that it gets confused with too many points. Once its got the basic geometry correct, the whole image is aligned.
Alignment in Registax is really a different animal. You are really doing two things: Trying to find the best images and align the images you select. I have only used multi-point alignment in Registax for Lunar images; planets I generally just align on the whole planet.
Quote:
Originally Posted by winensky
Excuse my ignorance but what is meant by upsampling?
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Upsampling is increasing the number of pixels in the image. My ToUCam is 640x480 pixels. When I upsample the image, I double the pixel dimensions to 1280x960, doubling effective resolution of the image. Of course, you can't create information where there isn't any, so the image really has no more information than the original. It probably has less because some information is lost in the interpolation of the new pixels, but I'm not sure about that. It does let me more effectively use the tools in PixInsight for sharpening and contrast adjustment, because there are more pixels to build the contrast gradients on.
HTH,
--Andy