Save as JPEG in PS

[glorybound]

Is there a way to save a 32 bit PS as a jpeg without having to change it to a 16 bit first? Right now I am tone mapping using a 32 bit and changing it to 16 bits so I can save as a jpeg. Once done I go back in history to bring it back to a 32 bit and save it again. It seems like a dumb way to work.

[im.thatoneguy]

File -> Export -> Export As

[glorybound]

Now, that makes sense. Thanks!

[glorybound]

no way to control the gamma that way, so it doesn't work

File -> Export -> Export As

[Morne]

What if you record a macro for your steps in post #1?

[glorybound]

Well, I suppose. I am surprised there isn't already a solution for this, here.

[kalamazandy]

As far as I know you've always been able to do this via "save for web" which is now considered obsolete, but it's still there. I tell Everyone to use that because people keep sending me CMYK jpegs. It's the same idea there. You don't have to switch modes, it will save a standard jpeg (or png or gif) for you without having to switch your document.
There's a size limit of 7k in either direction or something like that though. But if you have CC, then you can use the export as, which is essentially the same thing, only a little faster.

[glorybound]

For me, the gamma is wrong and I don't see a preference to change it.

As far as I know you've always been able to do this via "save for web" which is now considered obsolete, but it's still there. I tell Everyone to use that because people keep sending me CMYK jpegs. It's the same idea there. You don't have to switch modes, it will save a standard jpeg (or png or gif) for you without having to switch your document.
There's a size limit of 7k in either direction or something like that though. But if you have CC, then you can use the export as, which is essentially the same thing, only a little faster.

[kalamazandy]

You're right. Keep an Exposure layer adjustment on top of everything with a gamma correction of 2.2. You'll have to turn that on.
32bit is gama of 1.0, so you have to convert it before you save because the jpeg will be 2.2

[glorybound]

You're right. Keep an Exposure layer adjustment on top of everything with a gamma correction of 2.2. You'll have to turn that on. 32bit is gama of 1.0, so you have to convert it before you save because the jpeg will be 2.2

yep, that's the point. So, you have to downgrade your image to save it as a JPEG?

[kalamazandy]

So in your first post you're moving back and forth between 32bit and 16bit. As soon as you move to 16bit, your 32bit information is gone. That is a destructive edit.
Doing what I suggested never takes you out of 32bit. You can get your jpeg without having to change modes.

Now that I Think about it though, are you editing your image in 32bit to look visually correct in photoshop? If that is the case, you need to make a quick change. Actual color information is gamma 1.0. Your monitor is gamma 2.2. This is why your images Should look washed out in 32bit. They are gamma 1.0.
So edit your image, while seeing it in gamma 2.2 Go to View, 32-bit preview options, and change to gamma 2.2 (your monitor)
Now when you save your images you'll see they get darker. This is why I said you need to add that layer adjustment on top.

I could be wrong, but I'm pretty sure 32bit images are gamma 1.0. So if you're doing tone mapping to visually see what the hdr would look like you have to edit that visually while using gamma 2.2 instaed of 1, or your color info would be wrong?
I'm not sure what your image looks like, but what I explained definitely works for one workflow. I created a grey visually. In order to save what I see, I have to first see the image with a gamma of 2.2.
One thing you want to avoid is applying gamma twice. That'll add/lose contrast from what you're hoping for.

But again, if you're saving the image for a 3d program, then the 32bit image should be gamma 1.0 not 2.2. So you'd preview it with your layer adjustment turned on, then just save what Looks like a washed out image in the end. But it's really not.

[Morne]

I think what Bobby is saying is that he doesnt mess with his gamma at all. When you go from 32 to 16 to 8 bit, you always see the "correct" image even if you save.
But if you go Export as, it messes up the gamma in the new saved file, which does not happen when change modes and then save
Is that correct Bobby?

[glorybound]

That is correct. Working in 32 bit is awesome. However, I can't save as a jpeg, other then save as web, but the gamma is wrong once saved. To simply save as a jpeg requires me to compress to 16bit.

[im.thatoneguy]

Photoshop's 32 bit linear workflow is mostly correct.

It loads in linear and simply puts a viewer 2.2 gamma LUT on the image in the canvas so that it looks like it appears to the user as being natively 2.2 (Like Nuke's viewer LUTs). So yes when you output an image it doesn't apply the viewer lut before exporting a jpeg it just outputs the raw linear gamma values. The easiest way is definitely to have a macro as suggested above that turns on an exposure adjustment layer set to 2.2 gamma and then output and then turn it off (which is essentially what Nuke and Vray do internally. Linear -> 2.2 Gamma -> JPEG).

Just a note though to this point: "Your monitor is gamma 2.2. " Technically your monitor is linear, just like the real world. The monitor though assumes it's being fed a 2.2 gamma image and applies a 2.2 Gamma -> 1.0 LUT internally before outputting the photons. So in this case the full linear chain can be viewed as: Photoshop [1.0 gamma, 2.2 viewer lut hidden from the user] -> Exposure Adjustment Layer [1.0 to 2.2 Gamma] -> JPEG [stays 2.2 Gamma]-> Monitor [2.2 to 1.0 gamma] -> Photons [1.0 gamma] -> Eyeball/Brain [1.0 Gamma to 2.2ish perception]