Jup Aug 17th, GRS+Bird Strike+ Callisto+RGB animation, all in good seeing

[Quark (Trevor)]

Originally Posted by Paul Haese

Trevor, I use the resampling option in Astra Image once I have the whole image together and nearly finished. It does a great job of the resample. Photoshop CS3 also does a fine job of this too. Don't make it harder than it really should be. Just use those options and see what the data is like. Good data works well.

Thanks Paul, I have just finished having a bit of a play with re sampling image 3 from the set posted in this thread. I did all of my post Registax processing on 150% resampled data. When finished in CS4 I down sized to the original image size.

I have attached the new version it is much sharper than my original, which I thought looked alright and have included for comparison.

[Harpspitfire]

absolute super job!!

[Screwdriverone (Chris)]

Jeez they are good Trevor, well done!

Envious I am!

Congratulations.

Cheers

Chris

[Quark (Trevor)]

Originally Posted by Harpspitfire

absolute super job!!

Thanks for the positive comment.

Originally Posted by Screwdriverone

Jeez they are good Trevor, well done!

Envious I am!

Congratulations.

Cheers

Chris

Thanks very much Chris, its a steep learning curve but it feels great when things start to come together. I thought this set of images were pretty good but after playing around with re sampling what was probably the best image of the set and seeing yet another major improvement, it seems there really is no limit to what amateurs can produce.

[Paul Haese]

Yep that is it buddy. That resampled and sharpened image is fantastic. Excellent work. Certainly one of the best for this season. So much detail present. Remember that good data can be resampled and then resharpened. I like the smart sharpen tool in PS CS3. Great tool for doing that final bit of sharpening.

[Quark (Trevor)]

Originally Posted by Paul Haese

Yep that is it buddy. That resampled and sharpened image is fantastic. Excellent work. Certainly one of the best for this season. So much detail present. Remember that good data can be resampled and then resharpened. I like the smart sharpen tool in PS CS3. Great tool for doing that final bit of sharpening.

Thanks Paul, I have PS CS4 and I finish off my processing with a small levels adjustment, Smart sharpen and either Despeckle or a very light application of Noise Ninja, depending on how good my data is.

I am really amazed with the gain in resolution by employing re sampling and am working through all of my data from Aug 17th reprocessing it with this technique.

[Rigel003 (Graeme)]

That last image is fantastic Trevor, a real improvement. I'm not sure about this resampling near the end thing though. Resampling enlarges your image and for the extra pixels that have been added it interpolates values from the surrounding pixels. It will make a bigger picture but it can't improve resolution or add extra detail. I would rather have a smaller but sharper image than a bigger blurry one.

[Quark (Trevor)]

Originally Posted by Rigel003

That last image is fantastic Trevor, a real improvement. I'm not sure about this resampling near the end thing though. Resampling enlarges your image and for the extra pixels that have been added it interpolates values from the surrounding pixels. It will make a bigger picture but it can't improve resolution or add extra detail. I would rather have a smaller but sharper image than a bigger blurry one.

Thanks Graeme,

I am very pleased with the gain in resolution from re sampling.
This technique is quite new to me and will require more experimentation to establish the most effective way to employ it.

The image scale from my 16" F4.5 Newt is very nice to start with and I have found that with good data, even the resampled image is very nice, definitely not blurry.

Graeme, I freely admit that I do not understand the nuts and bolts of how resampling and for that matter deconvolution or other sharpening filters actually do their stuff. But I can see the results of my experimentation and at the end of the day, that is far and away the most crucial thing in processing, at least in my humble opinion.

I am doing minimal processing in Registax. I think this is where I have picked up resolution with the image posted here. The majority of and probably most crucial part of my processing was done on the upsampled image. The upsampled image, after final processing would stand alone on its merits, however down sizing that image back to my original image scale really gains so much, I was quite surprised as my data was very good to start with.

Obviously there are limitations to what can be extracted and it would be a wast of time and effort to do this with poor data, crap in crap out is how I look at it. However, with good data to start with there are real gains to be made. The proof of the pudding really is, in the eating.

[Quark (Trevor)]

Originally Posted by Rigel003

That last image is fantastic Trevor, a real improvement. I'm not sure about this resampling near the end thing though. Resampling enlarges your image and for the extra pixels that have been added it interpolates values from the surrounding pixels. It will make a bigger picture but it can't improve resolution or add extra detail. I would rather have a smaller but sharper image than a bigger blurry one.

Hi Graeme,
Just as amatter of interest, I have attached the resampled image, posted previously, but at the full upsampled size.

[Paul Haese]

Still fine data.

Now this will blow you away. Using 12 bit on the skynyx really helps when resampling. Remember the pixels are pretty small and really good data can be resampled and sharpened a whole lot more.

Graeme I hope you are using 12 bit now rather than the 8 bit version. I switched a long time ago and have noticed the difference since.

Trevor the enlarged image is pretty good, lot of detail showing for sure and not too blurry. Good data

[alphajuno (Dave)]

Excellent work Trevor - those images are truly awesome. Thanks.

[Quark (Trevor)]

Originally Posted by alphajuno

Excellent work Trevor - those images are truly awesome. Thanks.

Thanks Dave, I think, in Australia we are fortunate that Jupiter is virtually over head at the moment, that obviously assists greatly with image quality.

Originally Posted by Paul Haese

Still fine data.

Now this will blow you away. Using 12 bit on the skynyx really helps when resampling. Remember the pixels are pretty small and really good data can be resampled and sharpened a whole lot more.

Graeme I hope you are using 12 bit now rather than the 8 bit version. I switched a long time ago and have noticed the difference since.

Trevor the enlarged image is pretty good, lot of detail showing for sure and not too blurry. Good data

Thanks Paul, as you say, 12 bit capture would be great but the quality of the seeing, I think, is still the major determining factor with image quality. It would be nice to be able to image with higher end equipment but the DMK really is great value, to sort of get a leg into this field.
At the moment I am just rapt to be able to see some progression with my results with the equipment I have.