reduce 16 bits to 8 bits

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

tia

steve

wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

tia

I don’t know what you are looking at, but if you want 8-bit then just save to JPG then you have no other option but 8-bit

steve

wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

tia

I don’t know what you are looking at, but if you want 8-bit then just save to JPG then you have no other option but 8-bit

steve

unfortunately saving to 8 bits is not an option for any file that is 16 bits in photoshop cs4

steve

On Sat, 06 Jun 2009 20:06:29 -0500, Joel wrote:

wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

tia

I don’t know what you are looking at, but if you want 8-bit then just save to JPG then you have no other option but 8-bit

steve

unfortunately saving to 8 bits is not an option for any file that is 16 bits in photoshop cs4

steve

On Sat, 06 Jun 2009 20:06:29 -0500, Joel wrote:

wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

tia

I don’t know what you are looking at, but if you want 8-bit then just save to JPG then you have no other option but 8-bit

steve

unfortunately saving to 8 bits is not an option for any file that is 16 bits in photoshop cs4

Try File>Save for web & devices, select JPG and the compression you want Strange though!

unfortunately saving to 8 bits is not an option for any file that is 16 bits in photoshop cs4

Try File>Save for web & devices, select JPG and the compression you want Strange though!

Have you checked the mode: are you sure this is a 16 bit RGB image?

Have you checked the mode: are you sure this is a 16 bit RGB image?

fabulous idea … but …"not enough scratch memory" … and i have a scratch memory only 160 gig hard drive! the image is only 350 megs or so … strange …

but nice idea 🙂 …

steve

On Sun, 7 Jun 2009 13:21:36 +0200, "Fred" wrote:

unfortunately saving to 8 bits is not an option for any file that is 16 bits in photoshop cs4

Try File>Save for web & devices, select JPG and the compression you want Strange though!

fabulous idea … but …"not enough scratch memory" … and i have a scratch memory only 160 gig hard drive! the image is only 350 megs or so … strange …

but nice idea 🙂 …

steve

On Sun, 7 Jun 2009 13:21:36 +0200, "Fred" wrote:

unfortunately saving to 8 bits is not an option for any file that is 16 bits in photoshop cs4

Try File>Save for web & devices, select JPG and the compression you want Strange though!

yep … one can see the /16 in the top of the image

steve

On Sun, 7 Jun 2009 05:12:58 -0700, "botox"
wrote:

Have you checked the mode: are you sure this is a 16 bit RGB image?

yep … one can see the /16 in the top of the image

steve

On Sun, 7 Jun 2009 05:12:58 -0700, "botox"
wrote:

Have you checked the mode: are you sure this is a 16 bit RGB image?

On Sun, 07 Jun 2009 21:24:39 -0700, wrote:

only 160 gig hard drive! the image is only 350 megs or
so … strange …

350 megs is a very large image. So it’s not surprising that you are running out of memory and scratch space.

Make the image smaller. Unless you are using a view camera with a scanning back, or a composite image made up of a dozen or so smaller images, your image is larger than you need it to be.
—
Mike Russell – http://www.curvemeister.com

On Sun, 07 Jun 2009 21:24:39 -0700, wrote:

only 160 gig hard drive! the image is only 350 megs or
so … strange …

350 megs is a very large image. So it’s not surprising that you are running out of memory and scratch space.

Make the image smaller. Unless you are using a view camera with a scanning back, or a composite image made up of a dozen or so smaller images, your image is larger than you need it to be.
—
Mike Russell – http://www.curvemeister.com

On Sat, 06 Jun 2009 16:49:48 -0700, wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

This actually might be related to the color mode. I can recreate this behavior if I convert a 16 bit image to multichannel mode. 8 bits is greyed out, and it is not possible to select 8 bit mode until I convert to another mode such as Lab, RGB, or CMYK.
—
Mike Russell – http://www.curvemeister.com

On Sat, 06 Jun 2009 16:49:48 -0700, wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

This actually might be related to the color mode. I can recreate this behavior if I convert a 16 bit image to multichannel mode. 8 bits is greyed out, and it is not possible to select 8 bit mode until I convert to another mode such as Lab, RGB, or CMYK.
—
Mike Russell – http://www.curvemeister.com

"Mike Russell" wrote in message

On Sat, 06 Jun 2009 16:49:48 -0700, wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

This actually might be related to the color mode. I can recreate this behavior if I convert a 16 bit image to multichannel mode. 8 bits is greyed out, and it is not possible to select 8 bit mode until I convert to another mode such as Lab, RGB, or CMYK.
—
Mike Russell – http://www.curvemeister.com

well I was only guessing but
seems I was not far from the solution
of course the usuals chimed in to tell me I was wrong

"Mike Russell" wrote in message

On Sat, 06 Jun 2009 16:49:48 -0700, wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

This actually might be related to the color mode. I can recreate this behavior if I convert a 16 bit image to multichannel mode. 8 bits is greyed out, and it is not possible to select 8 bit mode until I convert to another mode such as Lab, RGB, or CMYK.
—
Mike Russell – http://www.curvemeister.com

well I was only guessing but
seems I was not far from the solution
of course the usuals chimed in to tell me I was wrong

On Tue, 9 Jun 2009 18:01:38 -0400, Kabuki wrote:

well I was only guessing but
seems I was not far from the solution
of course the usuals chimed in to tell me I was wrong

NO good deed goes unpunished, LOL.
OTOH, we may both be wrong…
—
Mike Russell – http://www.curvemeister.com

On Tue, 9 Jun 2009 18:01:38 -0400, Kabuki wrote:

well I was only guessing but
seems I was not far from the solution
of course the usuals chimed in to tell me I was wrong

NO good deed goes unpunished, LOL.
OTOH, we may both be wrong…
—
Mike Russell – http://www.curvemeister.com

according cs4 it is in rgb mode …i can send a screen shot documenting this …

steve

On Tue, 9 Jun 2009 10:26:18 -0700, Mike Russell
wrote:

On Sat, 06 Jun 2009 16:49:48 -0700, wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

This actually might be related to the color mode. I can recreate this behavior if I convert a 16 bit image to multichannel mode. 8 bits is greyed out, and it is not possible to select 8 bit mode until I convert to another mode such as Lab, RGB, or CMYK.

according cs4 it is in rgb mode …i can send a screen shot documenting this …

steve

On Tue, 9 Jun 2009 10:26:18 -0700, Mike Russell
wrote:

On Sat, 06 Jun 2009 16:49:48 -0700, wrote:

for some reason one of my 16 bit tif pix cannot be reduced to 8 bits! the 8 bit option is greyed out. i tried converting it to a psd but the 8 bit option was still greyed out. any suggestions how to get the 8 bit option back?

This actually might be related to the color mode. I can recreate this behavior if I convert a 16 bit image to multichannel mode. 8 bits is greyed out, and it is not possible to select 8 bit mode until I convert to another mode such as Lab, RGB, or CMYK.

shangara was kind enough to post a work around …i created an 8 bit blank image of the same dimensions …copied the 16 bit into it, ok’ed the conversion to 8 bits and it was a done deal …

but …i still wonder why the conversion of the original image was greyed out …oh well …

steve

On Tue, 9 Jun 2009 15:46:58 -0700, Mike Russell
wrote:

On Tue, 9 Jun 2009 18:01:38 -0400, Kabuki wrote:

well I was only guessing but
seems I was not far from the solution
of course the usuals chimed in to tell me I was wrong

NO good deed goes unpunished, LOL.
OTOH, we may both be wrong…

shangara was kind enough to post a work around …i created an 8 bit blank image of the same dimensions …copied the 16 bit into it, ok’ed the conversion to 8 bits and it was a done deal …

but …i still wonder why the conversion of the original image was greyed out …oh well …

steve

On Tue, 9 Jun 2009 15:46:58 -0700, Mike Russell
wrote:

On Tue, 9 Jun 2009 18:01:38 -0400, Kabuki wrote:

well I was only guessing but
seems I was not far from the solution
of course the usuals chimed in to tell me I was wrong

NO good deed goes unpunished, LOL.
OTOH, we may both be wrong…

wrote:

shangara was kind enough to post a work around …i created an 8 bit blank image of the same dimensions …copied the 16 bit into it, ok’ed the conversion to 8 bits and it was a done deal …

but …i still wonder why the conversion of the original image was greyed out …oh well …

steve

On Tue, 9 Jun 2009 15:46:58 -0700, Mike Russell
wrote:

On Tue, 9 Jun 2009 18:01:38 -0400, Kabuki wrote:

well I was only guessing but
seems I was not far from the solution
of course the usuals chimed in to tell me I was wrong

NO good deed goes unpunished, LOL.
OTOH, we may both be wrong…

If that worked then try a "save as" of your tiff file close and reopen it and see what happens.

In the past I have had problems with tiff files that were not correctly recognised in PShop 7.0? They were scanned slide images from the Nikon film scanner.

wrote:

shangara was kind enough to post a work around …i created an 8 bit blank image of the same dimensions …copied the 16 bit into it, ok’ed the conversion to 8 bits and it was a done deal …

but …i still wonder why the conversion of the original image was greyed out …oh well …

steve

On Tue, 9 Jun 2009 15:46:58 -0700, Mike Russell
wrote:

On Tue, 9 Jun 2009 18:01:38 -0400, Kabuki wrote:

well I was only guessing but
seems I was not far from the solution
of course the usuals chimed in to tell me I was wrong

NO good deed goes unpunished, LOL.
OTOH, we may both be wrong…

If that worked then try a "save as" of your tiff file close and reopen it and see what happens.

In the past I have had problems with tiff files that were not correctly recognised in PShop 7.0? They were scanned slide images from the Nikon film scanner.

On Tue, 09 Jun 2009 21:43:02 -0700, wrote:

according cs4 it is in rgb mode …i can send a screen shot documenting this …

Curiouser and curiouser. If you can get the size down to a few megs or so, email me a copy – mike at curvemeister.com and I’ll take a look.

—
Mike Russell – http://www.curvemeister.com

On Tue, 09 Jun 2009 21:43:02 -0700, wrote:

according cs4 it is in rgb mode …i can send a screen shot documenting this …

Curiouser and curiouser. If you can get the size down to a few megs or so, email me a copy – mike at curvemeister.com and I’ll take a look.

—
Mike Russell – http://www.curvemeister.com

the problem with that image is that it is about 400 megs 🙂 … and …. as it is 16 bits i can’t reduce it to a jpg 🙂 …

but shangara’s suggestion to copy it to a same size 8 bit image worked …. strange …

steve

On Tue, 9 Jun 2009 23:49:28 -0700, Mike Russell
wrote:

On Tue, 09 Jun 2009 21:43:02 -0700, wrote:

according cs4 it is in rgb mode …i can send a screen shot documenting this …

Curiouser and curiouser. If you can get the size down to a few megs or so, email me a copy – mike at curvemeister.com and I’ll take a look.

the problem with that image is that it is about 400 megs 🙂 … and …. as it is 16 bits i can’t reduce it to a jpg 🙂 …

but shangara’s suggestion to copy it to a same size 8 bit image worked …. strange …

steve

On Tue, 9 Jun 2009 23:49:28 -0700, Mike Russell
wrote:

On Tue, 09 Jun 2009 21:43:02 -0700, wrote:

according cs4 it is in rgb mode …i can send a screen shot documenting this …

Curiouser and curiouser. If you can get the size down to a few megs or so, email me a copy – mike at curvemeister.com and I’ll take a look.

On Wed, 10 Jun 2009 22:55:00 -0700, wrote:

the problem with that image is that it is about 400 megs 🙂 … and … as it is 16 bits i can’t reduce it to a jpg 🙂 …

Crop a section of the image and see if it has the same problem. If 8 bits is still grayed out, you can email it to me. If it is not, that’s a clue that it’s some sort of image size related issue, and that will also shed some light on the problem.

but shangara’s suggestion to copy it to a same size 8 bit image worked … strange …

Definitely.
—
Mike Russell – http://www.curvemeister.com

On Wed, 10 Jun 2009 22:55:00 -0700, wrote:

the problem with that image is that it is about 400 megs 🙂 … and … as it is 16 bits i can’t reduce it to a jpg 🙂 …

Crop a section of the image and see if it has the same problem. If 8 bits is still grayed out, you can email it to me. If it is not, that’s a clue that it’s some sort of image size related issue, and that will also shed some light on the problem.

but shangara’s suggestion to copy it to a same size 8 bit image worked … strange …

Definitely.
—
Mike Russell – http://www.curvemeister.com