IMAGE ROTATION

  • Thread starter Thread starter Guest
  • Start date Start date
I used to but I can not Rotate images right or left by 90
degrees any more.
Click to expand...
==================================

Here's a simple fix you can try:

If you previously checked "In the future do not
show me this dialog box" when a dialog warned
about the possibility of reducing the quality of
your images, the following fix may restore your
option to rotate.

Open a picture in the Windows Picture And Fax
Viewer. Hold down the Ctrl key and left click the
X in the top right corner of the window.


If that did not restore your option to rotate...

Try this:

go to...Start / Run and type:

"REGSVR32 SHIMGVW.DLL"
(without the quotes)(Yes, there's
a space between 2 and S)

Click...OK.

--

John Inzer
Picture It! MVP
return e-mail disabled

Picture It! Support Center
http://support.microsoft.com/?pr=pic
 
John

I recently bought a new computer with Windows XP, and so I am new to Windows Picture and Fax Viewer. While experimenting, I noticed that when I rotated pictures, they stayed rotated even after quitting and restarting Picture and Fax Viewer. To the best of my recollection, I did not get a dialog box warning about the possibility of reducing image quality. I also noticed that the time and date stamp on the files did not change. Does it modify the file, and is there the potential for quality reduction. In the past, I've always saved rotated images (or any edited images) with a different filename, but Picture and Fax Viewer didn't give me the option

As long as I have your attention (you seem very knowledgeable), I am also having trouble with the Preview option. My recollection is that when I first got the computer, the Preview option opened Windows Picture and Fax Viewer, and the Edit option opened Paintshop Pro, which came installed on my machine. But now the Preview option also opens PSP, displays the file, but also gives an error message saying that the file could not be found. I have tried modifying the registry under PaintshopProImageAlbum\shell\command\preview to Picture and Fax Viewer, and it works fine until I open an image for editing, at which point PSP modifies the registry so that it opens when Preview is selected. In another post, you mentioned modifying a registry key (...\image?) which changes the default behavior of all image files. Is that correct? Does that key take precedence over the .jpg, .jpeg, etc. keys

Thanks

Kyle
 
Kyle said:
John,

I recently bought a new computer with Windows XP, and so
I am new to Windows Picture and Fax Viewer. While
experimenting, I noticed that when I rotated pictures,
they stayed rotated even after quitting and restarting
Picture and Fax Viewer. To the best of my recollection,
I did not get a dialog box warning about the possibility
of reducing image quality.
Click to expand...
========================================
Yes...the images are saved in the new orientation.

Because of the compression algorithm in the .jpg
format there is some data loss every time you resave.

Windows Picture and Fax Viewer provides lossless
rotation for certain sizes...(must be an exact multiple
of 16 and probably 8. So if your image is, say, 2048 x
1360 it will be lossless.)

Unless your original images are very low resolution...
the loss would probably never be visible. However...
the best insurance against this and any other editing
problems is to save copies of the original, unedited
image files on CD-Rs.

If you are really interested in .jpg compression, the
following article is a good place to begin:

JPEG Image Compression FAQ
http://www.faqs.org/faqs/jpeg-faq/part1/
=========================================
I also noticed that the time and date stamp on the
files did not change. Does it modify the file, and is
there the potential for quality reduction. In the past,
I've always saved rotated images (or any edited
images) with a different filename, but Picture and
Fax Viewer didn't give me the option.
Click to expand...
=========================================
True, the date stamp remains the same.

There is always the potential for quality reduction
when editing/resaving a .jpg image unless you have
the option of lossless rotation.

Maybe the size of your images fits that profile in the
Picture and Fax Viewer. As a test, you could make
a copy of one of your image files and then rotate it
15 or 20 times...then compare it to the original and
see if the difference is noticable. Also might be worth
a try to print a before and after and compare. Then
you'll know if it is anything to worry about.

The freeware IrfanView has an option for lossless
JPEG rotation...might be worth giving it a try.

IrfanView 3.85
http://www.tucows.com/preview/194967.html
(get the plug-ins too)
=========================================
As long as I have your attention (you seem very
knowledgeable),
Click to expand...
=========================================
Go ahead...butter me up. Be aware that I've learned
what little I know right here in the newsgroups. I am
not any type of expert.
=========================================
I am also having trouble with the Preview option. My
recollection is that when I first got the computer, the
Preview option opened Windows Picture and Fax
Viewer, and the Edit option opened Paintshop Pro,
which came installed on my machine.
Click to expand...
=========================================
Windows XP default is that images open for viewing
in Windows Picture and Fax Viewer and the Edit button
opens MS Paint. Since PaintShop Pro was your default
image editor that must have been changed when it
was pre-installed.
=========================================
But now the Preview option also opens PSP, displays
the file, but also gives an error message saying that
the file could not be found.
Click to expand...
=========================================
Apparently the files have been moved, deleted or
possibly saved in a different format.
=========================================
I have tried modifying the registry under Paintshop
ProImageAlbum\shell\command\ preview to Picture
and Fax Viewer, and it works fine until I open an image
for editing, at which point PSP modifies the registry
so that it opens when Preview is selected. In another
post, you mentioned modifying a registry key (...\image?)
which changes the default behavior of all image files.
Is that correct? Does that key take precedence over
the .jpg, .jpeg, etc. keys?

Thanks,

Kyle
Click to expand...
=========================================
To choose the program that you view your images with
all you have to do is change your file associations:

Try this...open an image folder and right click one
of your image files...from the menu, select...Open
With / Choose Program.

Make your choice from the list or Browse to the
correct program if it is not in the list. Once you
make your selection...be sure to check the box
that says: "Always use the selected program to
open this kind of file". (you will need to do this
for each format....jpg, .tif, .gif...etc.)

Also...you can right click an image and choose
Properties / Change Button...choose the program
you wish to use and click...OK / Apply / OK.

Also...in WinXP, you can go to...My Computer /
Tools / Folder Options / File Types tab...



If you wish to change your default image editor...
the following instructions explain how:

How to open your choice of image editors when
clicking the Edit button on the Windows Picture
and Fax Viewer screen.

IMPORTANT: This message contains information
about modifying the registry. Before you modify the
registry, make sure to back it up and make sure that
you understand how to restore the registry if a problem
occurs. For information about how to back up, restore,
and edit the registry, click the following link to view the
article in the Microsoft Knowledge Base:

Information About Editing the Registry
http://support.microsoft.com/?kbid=256986#Topic2

===========================================

OK...go to...Start / Run and type in..."regedit" without
the quotes. Then click...OK...or press...Enter.

In the Registry Editor...drill down to:

HKEY_CLASSES_ROOT\SystemFileAssociations\image\shell\edit\command

In the Data column you should see:

"%systemroot%\system32\mspaint.exe" "%1"

(where you see *mspaint* in the example....you will
see your current default)

Replace the key with the path to the program that will
be your default image editor. I wanted Picture It! 7 so
the following is what I changed to.

"C:\Program Files\Microsoft Picture It! 7\pip.exe" "%1"

Now, my images still open in the Picture and Fax viewer
but if I left click the Edit button...Picture It! 7 opens.

To replace the string...

Left click "default" to select it.

Go to...Edit / Modify...

In the "Edit String" field...

Copy/Paste the path to your program choice:

"C:\Program Files\??????????\???.exe" "%1"

Left click...OK.

Now, your images still open in the Picture and Fax
Viewer but if you left click the Edit button...your image
editing program opens..

Good luck.



--

John Inzer
Picture It! MVP
return e-mail disabled

Picture It! Support Center
http://support.microsoft.com/?pr=pic
 
When I rotate forward then back a jpg file (multiple of 16), a binary file compare gives some differences. Is it just some metadata that changed, or....

Is your statement about the mathematically lossless character of jpg rotation of the Image Preview app of XP an official product group statement ? There's no KB article saying anything about it...and beside this: (entry #46 in http://sylvana.net/jpegcrop/losslessapps.html), I couldn't find any statement about it..

I wonder if the Image Preview code implements this
http://msdn.microsoft.com/library/d...formingaJPEGImageWithoutLossofInformation.asp
 
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