Apply Image expression - equations

[Marcus Octavian]

Greetings,

I have been working with the apply image filter and have never used something like the equations pallet.

Is there some place I can get a rough outline on how expression are expressed, looking to blend channels in at different percentages and things of that nature.

Many thanks

[John Rostron]

Look in help for "Expressions for field input". Or try this link.

John

[Marcus Octavian]

Thanks John,

This helps but I'm still looking for something a little more comprehensive.  I would like to know how to properly add a string that would blend the blue channel into the red at 50 percent. 

[David in Яuislip]

3 hours ago, Marcus Octavian said:

I would like to know how to properly add a string that would blend the blue channel into the red at 50 percent. 

How about DR = SR + SB/2 ?

[Marcus Octavian]

Thanks for that information it absolutely worked.  I was also interested in the syntax, I’m not very familiar with mathematical expressions but from what I see and from what I was told they are very similar to excel functions.

A simple search for Excel Formula Syntax can get you started on some pretty good channel blending

Thanks again for everyone’s help