Is Tiff format lossless, no matter what Program you use?

I have a free software I got called Ulead which is not comparable to
photoshop. However I can still edit some picture for a book we are
publishing. It allows me to save my edited pics in tiff format. Is
this format lossless no matter what software you use. So I can re
same as many times as I like without degrading the picture quality?
thanks.

"lbbss" wrote in message
...
I have a free software I got called Ulead which is not comparable to
photoshop. However I can still edit some picture for a book we are
publishing. It allows me to save my edited pics in tiff format. Is
this format lossless no matter what software you use. So I can re
same as many times as I like without degrading the picture quality?
thanks.

TIFF can be lossy depending on the settings you choose, just make sure you
check the coices to do lossless saving.

On Sun, 27 Jan 2008 08:53:29 +1100, "Pete D"
wrote:


"lbbss" wrote in message
...
I have a free software I got called Ulead which is not comparable to
photoshop. However I can still edit some picture for a book we are
publishing. It allows me to save my edited pics in tiff format. Is
this format lossless no matter what software you use. So I can re
same as many times as I like without degrading the picture quality?
thanks.

TIFF can be lossy depending on the settings you choose, just make sure you
check the coices to do lossless saving.

I'd be interested in hearing how you can make it lossy
without going to extraordinary effort. TIFF is a container
format that can encapsulate many types of image data, but
typically it will contain 8- or 16-bit RGB image data with
or without optional compression, all lossless.

For all practical purposes the answer to the original
question is "yes, TIFF is lossless".

--
John Bean

"John Bean" wrote in message
...
On Sun, 27 Jan 2008 08:53:29 +1100, "Pete D"
wrote:


"lbbss" wrote in message
...
I have a free software I got called Ulead which is not comparable to
photoshop. However I can still edit some picture for a book we are
publishing. It allows me to save my edited pics in tiff format. Is
this format lossless no matter what software you use. So I can re
same as many times as I like without degrading the picture quality?
thanks.

TIFF can be lossy depending on the settings you choose, just make sure you
check the coices to do lossless saving.

I'd be interested in hearing how you can make it lossy
without going to extraordinary effort. TIFF is a container
format that can encapsulate many types of image data, but
typically it will contain 8- or 16-bit RGB image data with
or without optional compression, all lossless.

For all practical purposes the answer to the original
question is "yes, TIFF is lossless".

--
John Bean

That wqs probably what I remember, compressed rather than lossy.

Good to see you back John.

Have you ordered a K20D yet?

Cheers.

Pete

On Sun, 27 Jan 2008 09:48:52 +1100, "Pete D"
wrote:
Good to see you back John.

:-)

Have you ordered a K20D yet?

No fear Pete, I'll see what Samsung has done with their
sensor first. Never buy "MK 1" hardware or run any "V1.0"
software...

--
John Bean

"John Bean" wrote in message
...
On Sun, 27 Jan 2008 09:48:52 +1100, "Pete D"
wrote:
Good to see you back John.

:-)

Have you ordered a K20D yet?

No fear Pete, I'll see what Samsung has done with their
sensor first. Never buy "MK 1" hardware or run any "V1.0"
software...

--
John Bean

So you don't have a K10D or D or DS or K100D?

lbbss wrote:
I have a free software I got called Ulead which is not comparable to
photoshop. However I can still edit some picture for a book we are
publishing. It allows me to save my edited pics in tiff format. Is
this format lossless no matter what software you use. So I can re
same as many times as I like without degrading the picture quality?
thanks.

TIFF has no standard compression, so either lossy, or lossless,
compression could be applied to the file. Generally TIFF files are
compressed with LZW compression, which is lossless.

On Sun, 27 Jan 2008 13:12:23 +1100, "Pete D"
wrote:


"John Bean" wrote in message
.. .
On Sun, 27 Jan 2008 09:48:52 +1100, "Pete D"
wrote:
Good to see you back John.

:-)

Have you ordered a K20D yet?

No fear Pete, I'll see what Samsung has done with their
sensor first. Never buy "MK 1" hardware or run any "V1.0"
software...

--
John Bean

So you don't have a K10D or D or DS or K100D?

Not a D or a K10D. The DS that I have is a second-generation
design using the same sensor as the D and was was not on
v1.0 firmware when I bought it, and the K100D is third
generation using essetially the same hardware; it's the
sensor more than the body itself that I wouldn't buy in "Mk
1" form.

The K10D is a good example - it suffered from some noise
problems that weren't present in any of the earlier Pentax
cameras and it wasn't entirely fixed with later firmware.
Not that it isn't a good performer in its class, just that
in can't do some of the things I use my DS for because of
the relatively poor high-ISO performance. None of this was
discovered until the camera was in the hands of users.

That's what I meant by "never buy Mk 1 hardware or run
"V1.0" software - I'll let others shake the bugs out before
I even look at the possibility of buying one.


--
John Bean

On Sat, 26 Jan 2008 13:06:20 -0800 (PST), lbbss wrote:

I have a free software I got called Ulead which is not comparable to
photoshop. However I can still edit some picture for a book we are
publishing. It allows me to save my edited pics in tiff format. Is
this format lossless no matter what software you use. So I can re
same as many times as I like without degrading the picture quality?
thanks.

There is a TIFF format where the image is encoded as a JPEG, which I assume
is usually lossy. If ULead supports this (which I doubt), I'm sure they'll
also support lossless TIFF formats.

John Bean wrote:
I'd be interested in hearing how you can make it lossy
without going to extraordinary effort.

PhotoShop-Windows: "Save as...", select TIFF, set compression to JPEG.
Gimp: "Save as...", select TIFF, set compression to JPEG.
PhotoFilt No options whatsoever.
Paint.NET: No options whatsoever.
IrfanView: "Save as...", select TIFF, set compression to JPEG.

So far, 100% of the programs I checked either provided no way of
selecting the type of compression at all or provided JPEG among the
available compressions.

For all practical purposes the answer to the original
question is "yes, TIFF is lossless".

For all practical purposes, when a beginner asks about a procedure
where it's easy to make mistakes ("Look! By selecting JPEG and 50%, my
files get so much smaller!"), it's advisable to make clear how to avoid
those mistakes.
--
Toke Eskildsen - http://ekot.dk/