Does HT highlight clipped pixels?

[blackdragon72]

I want to clip more pixels in the shadow when doing histogram transformation, but I can not find where those pixels are. They are not in the faint nebula since when I use readout, faintest pixels are far to the right. Is there any way to show the clipped pixels, and is it safe to clip them if not in the nebula?

[Carlos Milovic]

Clone the image, and use the Binarize process.
If it is scattered, random noise, sure, clip them.

[oldwexi]

Hi,
after HT with PixelMath:

iif($T==0,1,$T)   sets the clipped shadow Pixels to 1 and lets the rest unchanged, this makes them somehow better visible.
iif($T==0,1,0)     sets the clipped shadow Pixels to 1 and all others to Zero, so you can much better recognize them.

If you want to see it before and you move the shadow slider in HT to the right you see the number of pixels clipped AND
you see the value where your slider stands for clipping, for example at 0.0025745  (without executing it!)
then your PixelMath could be:
iif($T<0.0025745,1,0)   sets the clipped shadow Pixels which are darker as 0.0025745 to 1 and the rest to Zero, so you can much better recognize them.

Statistics also shows the darkest Pixel and the x,y coordinate of it, but only of this one Pixel...

Hope this helps

Gerald

[blackdragon72]

Carlos,

It works.

Gerald,

I will note it down, since I am new to Pixinsight and have not used PixMatch yet.

Can this function be added to HT? It seems a very useful feature and should be easy to implement.