PI Pixelmath tutorial?

[Viktiste]

Are there any good  PI Pixelmath tutorials out there?

I would like to understand the syntax, but cannot find any good tutorials. Most stuff I find out there are very specific to one task, and usually from an old pixelmath version.

Say for example I would like to check if I have black clipped pixels in Image 'L', I would think the following would set all pixels greater than K=500 to 65000, an leave the ones below 500 as is. 

But it does noting.

[Scooot]

These are the only pixelmath tutorials I know of but I suspect they’re not what you’re looking for. Or you’ve seen them already.

http://www.werbeagentur.org/oldwexi/PixInsight/PixInsight.html

[Viktiste]

No, had not found this. I will look through them, thanks.

[Dr_Ju_ju]

and there are: https://www.easypixinsight.com/tutorials

[A320Flyer]

Internally, PI uses a Normalised Scale where 0 represents Black and 1 represents White.

So, your value of 500 is represented by 0.008 on the Normalised Scale.

$T is used to represent the pixel value of the active image.

So, your formula should be written as iif($T<0.008,$T,1)

Try that. 

Cheers

Bill