[Unofficial] New Module: Sharpen

[Carlos Milovic]

Hi everybody

Here is a new release, this time a process I called Sharpen. Why? Because it is an implementation of one of the most simplest version of a sharpen algorithm... well, not that simple in this case A long time ago I was wondering if a laplacian sharpening filter (using the second derivative) may be used at larger scales, not just as a simple difference between neighbor pixels. So, here is the result, a scale variable algorithm. You may choose between 4 filters, Laplacian4, Laplacian8, WeightedLaplacian8 and LaplaceOfGaussian. The first 3 are straightforward: just decide how many pixels are defined as neighborhood, and how their influence is calculated. The last algorithm is a bit different, first a gaussian blur is applied, with the defined radius as standard deviation, and then a simple laplacian filter is applied too.

Additionally, you may adjust the amount (strength), set a threshold, deringing... and modify the dynamic range.


Here is the Win32 compilation:
http://pteam.pixinsight.com/carlos/modules/Sharpen-pxm.zip

Source code (this module may include a real time preview option, but everything related has been disabled there):
http://pteam.pixinsight.com/carlos/modules/Sharpen-src-2009-09-25.zip


I hope you like it Have fun trying the results with different values for the radius.

[Nocturnal]

Well well, you've been busy Carlos! Looks like I need to put my coding hat back on and finish the profile tool

Many thanks!

[Carlos Milovic]

Thanks Sander

Yes, quite busy... and boring week with economics ans chemistry tests, and a flu


What does your profile tool so? Just asking to avoid doing the same thing
Btw., I'm starting a tool that plots the intensity of pixels v/s a spatial coordinate (row, column, any line, or a radius)

[Nocturnal]

Hi Carlos,

it was announced here:

http://pixinsight.com/forum/index.php?topic=1308.0

but I need to recompile it for the latest PCL. You draw a line on an image and the tool plots RGB, R, G, B, Lum or Sat. There's also an export to .csv function but that needs some work. Sounds like it may be similar to what you have in mind except yours has more options for how to draw the line?

[Carlos Milovic]

Yes, sounds very similar   already wrote a lot of the code one or two years ago, and left unfinished... Let me finish it, see what you have, and start a combined project we two

[Nocturnal]

Hi Carlos,

sure, that might be possible. As we both already have code written it may be our approaches are very different so it may not be possible to merge. We can certainly help each other make progress though. Let me get the module recompiled so you can give it a try. It'll be an opportunity to try Juan's new makefile generator and see if it can create 32bit binaries on a 64bit system.

[Carlos Milovic]

I did not remember how old, and complex the code was It will take me a while to update the code to the current PCL, and understand what I wrote (now I'm fighting against the parameters... next, interface, the old foe )

[Nocturnal]

Just making the module work isn't so hard but to tie everything together so the process can be saved in the image history and as a process icon etc., well, that's enough to make a grown man cry

[Carlos Milovic]

Aren't those side-effects of making it work?

[Harry page]

Hi Carlos

Sorry I am a dumbo but how do you install this module and I presume its a 32 bit only job 

Regards Harry

[Nocturnal]

Hi Harry,

- uncompress it somewhere
- use the process->modules->install module dialog

[Harry page]

Hi

Thanks for the info now got it loaded   

Also many thanks for this Carlos , works great and is a great addition to pixinsight as If we are to totally wean ourselves of photoshop we need relatively simple tools like this one, as well as the complex ( all be it probably more powerful ) Modules.

Any chance of a 64 bit version   

Regards Harry

[Nocturnal]

Hi Harry,

you *could* install PCL64 and Visual Studio Express 2008 (free) and compile it yourself

Or you can wait till I get around to doing it. I meant to do so last night but didn't.

[Harry page]

Hi

I have tried your filter and find the 4 version works fine , but the 8 filters crash with a memory violation 

What do you think

Harry

[C. Sonnenstein]

Hi Carlos!

This tool is very exciting, and very useful for flatten star masks. Congratulations.