Legacy ImageMagick Discussions Archive

That's all been really, really helpful - thanks!

OK - I think I have got that. So 'clone' (used within the parentheses) uses the 'outside' list to create 'local' copies which, within the parentheses, are referenced from '0' again'? Presumably then, as a programmer would say, the 'outside' list images are 'out of scope' within the parentheses: no ...

May I ask some really dumb, newbie questions? ("No. Go RTM" is an OK answer of course! Although I have done that already ...) This is just about the mechanics of IM. So in your script: %IM%convert ^ %SRC% ^ ( -clone 0 ^ -statistic maximum 10x10 ^ +write sx.png ^ ) ^ Does that make a working copy of ...

And it's a Nikon D90, APS-C'ish sensor.

The lens is a Samyang 10mm f2.8 - I haven't got around to finding the LightRoom distortion parameters for it yet. It has quite a bit of vignetting too which I roughly took out in LR.

I'm out and about today but I'll play with this tommorow. Thanks again for your help.

Just FYI, I put some actual images in the dropbox. RAW, TIFF, PNG and JPG of the same image. This is what I'm using as my test image.

https://www.dropbox.com/sh/3r285p0x1c1a ... _ECxa?dl=0

Working my way through this, although I should probably stop now due to the lateness of the hour! I need to look at it again tomorrow but it seems the main effect is to increase the size of all the point sources in the 'sky' - which it does very well. But what I want is for the size of those point ...

Yes. I'll do that. These are actually part of a timelapse movie, so I want the 'final' images as jpg's for ease of handling. But if I know I'm going to include imagemagick as an intermediate step I can work in TIFF or PNG and presumably output the imagemagick finals as jpg's.

I just tried your suggestion and it's definitely headed in the right direction!

I'll go through it tomorrow and try to figure out what each step does.

Thanks.

My originals are in RAW by the way. I can export from LightRoom in a different intermediate format if that's better.

Cool. I'll have a play with that.

I've been playing with -morphology hitandmiss peaks:1 and contrast stretch to try to make a mask.

Kevin

This is a coarse mockup done in PhotoShop. Above is original, below is processed: https://www.dropbox.com/s/2d0gk88050maf ... e.jpg?dl=0

Having searched the forum there are discussions about creating starfields from scratch using ImageMagick but i can't find anything which addresses my specific need. And as a new user I'm struggling to figure out how to do what I want. I have some images of the night sky which contain the sky ...