PixelMath 50:50 blending

[Zocky]

Which expression should be used in PixelMath, for combining L and Ha image in 50:50 blending mode?

Thnx.

[anteje]

(0.5*L)+(0.5*Halfa) I guess.

[kolec]

The first You must linear fit L and Ha

Kolec

[gvanhau]

Hello

I think you can use something like  Ha*median(L)+L*median(Ha)   and enable the rescale result.


Geert

[Juan Conejero]

Which expression should be used in PixelMath, for combining L and Ha image in 50:50 blending mode?

This is simplest way:

(L + Ha)/2

A more generic formulation is of course:

0.5*L + 0.5*Ha

mainly because it provides the structure to implement different combining ratios, such as for example:

0.75*L + 0.25*Ha

You can also define two symbols; for example:

a = 0.75, b = 0.25

and rewrite the expression to use them instead of literal values:

a*L + b*Ha

which can be more manageable, especially if you're going to use more complex expressions.

[Harry page]

Hi

I remember somewhere a Mr Juan was going to look into a simple image blending tool , but then again

I could have imagined it 

Harry

[oldwexi]

Hi Harry!
There is already a Blend Script available.
Origin by Mike Reid, Translation to German and extensions by me.
Program structure completely new designed by Hartmut Bornemann!
http://www.werbeagentur.org/oldwexi/Daten/Blend.js

This blend allows also the inclusion of a mask.
The latest version can also create a starmask from the actual Image.

Gerald

[Harry page]

Hi

That looks good , need to learn German though

Perhaps a English translation for the lazy English person  8)

Harry

[msmythers]

Gerald,

Thanks for sharing the Blend script. Very nice! And Harry I went through with Google and Bing and translated the "Text" sections. Took about 10 minutes but well worth it all though I'm not sure for the best translation of  "Ãœberblend". Anyway very nice blending script.


Mike

[Herbert_W]

Hi,

a translation for the blending modes (= Überblend Modus): english > german (a download from the internet):

Normal    Normal
Dissolve    Sprenkeln
Multiply    Multiplizieren
Screen       Negativ multiplizieren
Overlay    Ineinanderkopieren
Soft Light     Weiches Licht
Hard Light    Hartes Licht
Color Dodge    Farbig abwedeln
Color Burn    Farbig nachbelichten
Darken       Abdunkeln
Lighten    Aufhellen
Difference    Differenz
Exclusion    Ausschluss
Hue       Farbton
Saturation    Sättigung
Color       Farbe
Luminosity    Luminanz
Linear Burn    Linear nachbelichten
Linear Dodge    Linear abwedeln
Vivid Light    Strahlendes Licht
Linear Light    Lineares Licht
Pin Light    Lichtpunkte

Best regards.
Herbert, Austria

[msmythers]

Herbert,

Thank You


Mike

[oldwexi]

Hi,
o.k. will translate it back to english.
Gerald

[oldwexi]

Translated Version of the Blend Script  is available under:
http://www.werbeagentur.org/oldwexi/Daten/Blend_StarMask_english.js
Script is available on "As Is" base...

Gerald

[msmythers]

Gerald,

Again thanks. For those of us who love PixelMath but are not good with it this script is wonderful. It takes a little getting used to but it is very powerful like all of PixInsight. I can see it being part of my regular workflows.


Mike

[Harry page]

Hi

great stuff thanks young man

now for the non photoshop , what do the non obvious blending modes do ?

Harry