Pro Photo’s 16-bit mode deactivates filters

Robert Montgomery found these unused
words:

I recently began using Pro Photo color space as my standard color space in Photoshop.

I learned by researching that the Pro Photo color space requires the 16-bit mode to accommodate the wider gamut afforded by Pro Photo..
I also learned by experimenting that 16-bit mode causes a problem because it deactivates Photoshop’s built-in filters, and that to activate the filters, I have to reduce my images to 8-bit mode.
I suppose that reducing my images to 8-bit mode clips the gamut of my images back to a gamut approximated Adobe RGB or sRGBIEC61966-2.1.
How can I retain the wider gamut provided by 16-bit mode while still being able to use Photoshop’s filters?

Robert

Obtain the filters designed for 16 bit mode.

On 2011-11-28 06:21:14 -0800, Robert Montgomery
said:

I recently began using Pro Photo color space as my standard color space in Photoshop.

I learned by researching that the Pro Photo color space requires the 16-bit mode to accommodate the wider gamut afforded by Pro Photo..
I also learned by experimenting that 16-bit mode causes a problem because it deactivates Photoshop’s built-in filters, and that to activate the filters, I have to reduce my images to 8-bit mode.
I suppose that reducing my images to 8-bit mode clips the gamut of my images back to a gamut approximated Adobe RGB or sRGBIEC61966-2.1.
How can I retain the wider gamut provided by 16-bit mode while still being able to use Photoshop’s filters?

Robert

As you have discovered, ProPhoto is not the issue, 16-bit mode is. If you need to use those 8-bit PS filters you will have to change modes. The thing is, most of the filters needed for photo processing are 16-bit. It is only when you want to get all artsy that you will need to use 8-bit. Also you are going to have to change to 8-bit if you are going to save as a JPEG.

I would evaluate just how much your final product actually need the 16-bit mode. You are not going to need the wider gamut for 99% of online display. You should also ask yourself just how much you actually need the 16-bit mode for prints after you have manipulated using those filters which are going to pretty much distort your image.

In 16-bit mode the only Photoshop filters available are: Lens Correction
Liquify
Vanishing Point

Blur
Noise
Render
Sharpen
Stylize (emboss, find edges, solarize only)
Video

Most third party filters function as 16-bit.
Well, all of mine do.
—
Regards,

Savageduck

Robert Montgomery wrote:

I suppose that reducing my images to 8-bit mode clips the gamut of my images back to a gamut approximated Adobe RGB or sRGBIEC61966-2.1.

No, it does not. Changing the bit depth does not change the gamut. However, if you use ProPhotoRGB in 8 bits, you will get severe banding when you start working on the images.

How can I retain the wider gamut provided by 16-bit mode while still being able to use Photoshop’s filters?

You can’t for those filters that are 8 bits only.

—
Johan W. Elzenga, Editor/Photographer, www.johanfoto.com

Sir F. A. Rien wrote:

Robert Montgomery found these unused
words:

I recently began using Pro Photo color space as my standard color space in Photoshop.

I learned by researching that the Pro Photo color space requires the 16-bit mode to accommodate the wider gamut afforded by Pro Photo..
I also learned by experimenting that 16-bit mode causes a problem because it deactivates Photoshop’s built-in filters, and that to activate the filters, I have to reduce my images to 8-bit mode.
I suppose that reducing my images to 8-bit mode clips the gamut of my images back to a gamut approximated Adobe RGB or sRGBIEC61966-2.1.
How can I retain the wider gamut provided by 16-bit mode while still being able to use Photoshop’s filters?

Robert

Obtain the filters designed for 16 bit mode.

Thanks.

Where can I obtain the Artistic and Brush Strokes filters in 16-bit mode.?

Robert

Savageduck wrote:

On 2011-11-28 06:21:14 -0800, Robert Montgomery
said:

I recently began using Pro Photo color space as my standard color space in Photoshop.

I learned by researching that the Pro Photo color space requires the 16-bit mode to accommodate the wider gamut afforded by Pro Photo..
I also learned by experimenting that 16-bit mode causes a problem because it deactivates Photoshop’s built-in filters, and that to activate the filters, I have to reduce my images to 8-bit mode.
I suppose that reducing my images to 8-bit mode clips the gamut of my images back to a gamut approximated Adobe RGB or sRGBIEC61966-2.1.
How can I retain the wider gamut provided by 16-bit mode while still being able to use Photoshop’s filters?

Robert

As you have discovered, ProPhoto is not the issue, 16-bit mode is. If you need to use those 8-bit PS filters you will have to change modes. The thing is, most of the filters needed for photo processing are 16-bit. It is only when you want to get all artsy that you will need to use 8-bit. Also you are going to have to change to 8-bit if you are going to save as a JPEG.

I would evaluate just how much your final product actually need the 16-bit mode. You are not going to need the wider gamut for 99% of online display. You should also ask yourself just how much you actually need the 16-bit mode for prints after you have manipulated using those filters which are going to pretty much distort your image.

Thanks Savage Duck.

Image distortion and color spectrum are separate topics.

I want a wide spectrum for my prints – wider than Adobe RGB, sRGB and sRGBIEC61966-2.1.

In 16-bit mode the only Photoshop filters available are: Lens Correction
Liquify
Vanishing Point

Blur
Noise
Render
Sharpen
Stylize (emboss, find edges, solarize only)
Video

Most third party filters function as 16-bit.
Well, all of mine do.

Robert

Johan W. Elzenga wrote:

Robert Montgomery wrote:

I suppose that reducing my images to 8-bit mode clips the gamut of my images back to a gamut approximated Adobe RGB or sRGBIEC61966-2.1.

No, it does not. Changing the bit depth does not change the gamut. However, if you use ProPhotoRGB in 8 bits, you will get severe banding when you start working on the images.

Thanks, Johan. I didn’t know that.

How can I retain the wider gamut provided by 16-bit mode while still being able to use Photoshop’s filters?

You can’t for those filters that are 8 bits only.

So no one provides the Artistic and Brush Strokes filters for Photoshop for use in 16-bit mode?

Robert