Layer mixing with treshold

From: (Don)

What I want to do now is use this alpha channel to selectively combine the two images/layers i.e. use highlights from one and lowlights from the other.

1. How do I turn the threshold image into a selection so I can feather the edges?

2. Opacity is at 100% for both layers/image because, I figure, the amount of resulting image content will be determined by the alpha channel, right?

Even if I’m going about this in a wrong way please answer the above questions anyway (in addition to the correct procedure, of course).

1. How do I turn the threshold image into a selection so I can feather the edges?

Select > Load Selection and pick the alpha channel from the menu …

Even if I’m going about this in a wrong way please answer the above questions anyway (in addition to the correct procedure, of course).

Sounds like you are trying to do "contrast masking" to increase the apparent dynamic range … try a Google search on "contrast masking photoshop" and you’ll get a lot of good info … here’s the first one that pops up … if you have CS you might also try the new shadow/highlight tool …
http://www.luminous-landscape.com/tutorials/contrast_masking .shtml

On 21 Feb 2004 14:56:22 GMT, (Bill Hilton)
wrote:

1. How do I turn the threshold image into a selection so I can feather the edges?

Select > Load Selection and pick the alpha channel from the menu …

Bingo! Simply magical!

Even if I’m going about this in a wrong way please answer the above questions anyway (in addition to the correct procedure, of course).

Sounds like you are trying to do "contrast masking" to increase the apparent dynamic range … try a Google search on "contrast masking photoshop" and you’ll get a lot of good info … here’s the first one that pops up … if you have CS you might also try the new shadow/highlight tool …
http://www.luminous-landscape.com/tutorials/contrast_masking .shtml

Yup, that’s exactly what I’m trying to do. Didn’t know what it was called because I invented it myself…

I’m running PS 6 but now that I know what to search for I’ll chase up those links …

Thanks again!

Don.

Sounds like you are trying to do "contrast masking" to increase the apparent dynamic range … try a Google search on "contrast masking photoshop" and you’ll get a lot of good info … here’s the first one that pops up … if you have CS you might also try the new shadow/highlight tool …
http://www.luminous-landscape.com/tutorials/contrast_masking .shtml

Yup, that’s exactly what I’m trying to do. Didn’t know what it was called because I invented it myself…

I’m running PS 6 but now that I know what to search for I’ll chase up those links …

Double click on a layer. Bring up layer options. Use the sliders with the alt key to tune in the tones you want from each layer.