New Harry Page Video : MUST SEE FOR ALL NEWBIES

[Catanonia]

Because Harry is too modest to post this, I will


Harry has created an absolutely stunning demonstration video showing the whole process with perfect explanations, and of course made all the better for my rubbish data supplied to him of M106

The video goes through

Star Alignment
Screen Transfers
Cropping
Background Neutralisation
DBE
Colour Calibration
Histogram stretches
Satutration
Noise reduction

and loads of other tasks and gives you a pefect feel for the work flow that you might take with PI.

This is by far the best video he or anyone has made on PI as it brings everything together into a nice smooth workflow. A bit like know how to get from A to B and C to D but still not knowing what the whole town map looks like. This video delivers that. I fact I would go as far as to say that anyone starting out with PI should watch this video first and use it as a reference chapter diving into his other videos explaining the processes more in depth as you get to that section.

So I would like to publically give a huge thanks to Harry for taking time out and creating this awesome video and I urge everyone to link it in thier favorites for reference if they are starting out with PI.

So here it is

http://www.harrysastroshed.com/CATM106.HTML

Enjoy and thanks Harry, I have learnt so much in that 15 minutes and with my data too

[Nocturnal]

Thanks Harry!

[RobF2]

More great work from the educational master.
We salute you Sir Harry....   8)

[georg.viehoever]

Thanks Harry, another very useful one  8) .

Remarks:
- if the goal of the Background Neutralization step is to get a well balanced STFed image, it is also possible to do this in STF by uncoupling the channels (icon on the top left), and press "A" again. After this you can couple the channels again.
- I would usually do Background Neutralization after DBE. The gradient may also distort the color balance of your background.
- Usually, after DBE, Background Neutralization is not necessary. DBE does this as a side effect.

Georg

[Harry page]

Hi George

As you say there is more than one way to skin the cat 

I tend to use Bn before DBE only when I get a badly unbalanced colour image as if I leave it all to DBE it sometimes takes more than one application of DBE , of course there is nothing wrong with doing 2 or even 3 applications of DBE if needed . also if I can DBE right I rarely use BN after DBE , but saying that if things start to drift you can use BN at any time during your process

Regards Harry

[Josh Lake]

I concur, Georg.

I learned PI from Harry's videos initially, and the BackgroundNeut. before DBE made sense to me. First you get rid of the 'base' color, then you deal with the more complex gradients with DBE.

However, when I saw Vicent's workshop at NEAIC, I was surprised to see that he does it the other way -- DBE first, then BackgroundNeutralization if necessary. It still doesn't make a ton of logical sense to me, but I'm sure there's a good explanation.

[Harry page]

Hi

What is most important is that you have a neut background before colour calibration or it does not work correctly 

Use BN as when you feel the need it will not hurt anything 

Harry

[Nocturnal]

Near as I can tell DBE has BN built in and enabled by default. I've run BN after DBE but it doesn't do anything. So I generally do DBE followed by CC.

Great video Harry! A super example that shows PI isn't difficult for even sophisticated processing (wavelets).

[pfile]

i've always done DBE as the very first step of processing... i guess you can do BN first if you carefully pick the reference preview but in my case the entire frame is usually covered with an LP gradient. and like sander since DBE neutralizes the background (if "Normalize" is not checked), i usually never do BN separately. in fact i think when you do color calibration it always analyzes the background, no? so it gets done post-DBE whether you like it or not if you do a color calibration...

 

[Catanonia]

As you say there is more than one way to skin the cat 

Hey steady now :D:D

Can't wait for part II of the video

Nudge Nudge harry

[Harry page]

Hi Mr cat

Spotted my little joke then 

I will do the Lum vid on sunday 

Harry

[RBA]

Sorry but to me, applying BN before DBE doesn't make any sense.

Cheers!

[RBA]

BTW congratulations for the video! I'm certain many people would find it extremely valuable - despite that discrepancy we're having  8)

[sleshin]

Another great video tutorial, Harry. Thanks for taking the time to do this one and, indeed, all of them.

Have to agree with Rogelio that BN before DBE doesn't make sense and , as others have stated doesn't seem to be necessary after DBE is applied.

My RGB master images usually start out with significant background imbalances so I can't see the gradients that need to be removed with DBE. To deal with this I clone the image and apply BN to this clone. I now can see the gradients so I use this image to create, test and check the background DBE model. When this look correct I create an instance of these DBE settings and apply it to the original image so DBE is being applied before BN. The resulting image has a corrected background so BN isn't needed.

Steve

[Harry page]

Hi Steve


I think you are way past my little old video's  8)

Yup another way to skin , oh sorry should not say that 

I have tried many ways with the same result , and I appear not to be damaging the data doing it my way  so people you pays your money
and you take your choice 

regards Harry