Quality of resize with PIP9 or Suite

[Guest]

What type of resampling is applied by the advanced photo editors from MS.
Why is this not mentioned in the manual. Or even more, why not allow me
to choose between quality (bicubic resampling) or speed (kill the pixels).

I did a test to resize a photo with Picture It! 9 and IrfanView 3.97.

Seems like Picture It! does no resampling at all ? Compared to
Irfan bicubic it is obvious PIP9 just deleted some pixels. Text
was hardly readable. Irfan did a good job. The resized image
was more blurry than the original but still very good.

Who knows more about this ?

If you read the Help it does't say a lot. It starts to refer to
Upgrading to Digital Image Pro when it becomes seriuos. That woories me.
I expect PIP9 to be as good as to resample when resizing :-(

Otherwise I just stick with Office2003 Picture Manager.

 

[John Inzer]

What type of resampling is applied by the advanced photo
editors from MS. Why is this not mentioned in the manual.
Or even more, why not allow me to choose between quality
(bicubic resampling) or speed (kill the pixels).

I did a test to resize a photo with Picture It! 9 and
IrfanView 3.97.

Seems like Picture It! does no resampling at all ?
Compared to
Irfan bicubic it is obvious PIP9 just deleted some
pixels. Text
was hardly readable. Irfan did a good job. The resized
image
was more blurry than the original but still very good.

Who knows more about this ?

If you read the Help it does't say a lot. It starts to
refer to
Upgrading to Digital Image Pro when it becomes seriuos.
That woories me. I expect PIP9 to be as good as to
resample when resizing :-(

Otherwise I just stick with Office2003 Picture Manager.

=================================
Are we discussing JPEG images? JPEG is
a lossy format and if you are doing lots of
re-saves you may have better success with
a lossless format like PNG or TIFF.

What is the original pixel size of your image
and what are you resizing it to?

In PI9 you can adjust the Save As quality on
your Save As screen. Click the Options button
and adjust the 'Quality level' slider.

The following is from the PI9 Help file...this
refers to the settings at...Format / Resize Image:

===
Pixel dimensions are locked by default so
that your image will not lose any of its original
visual information. The initial pixel dimensions
reflect the quality of the original image. If you
lock a different setting and change one of the
remaining values, the pixel dimensions will
change and you may lose data that cannot be
regained.
===

For simple batch resizing of images I find
the following free PowerToy to be quite useful:

OK, go to the following link and download and
install: ImageResizer.exe

http://tinyurl.com/36n

Then you can open any folder that contains
images and you will have an option to resize.
Just right click the selected image files and
choose Resize Pictures from the menu. You
can select one image or a whole group.

The program will place the resized copies in
the folder with your originals.
(Tip: *Never* overwrite your originals)

--

*Notice*
This is not tech support.
I am only a volunteer.....

Solutions that work for
me may not work for you.

Proceed at your own risk.

John Inzer
Picture It! MVP

Digital Image
Highlights and FAQs
http://tinyurl.com/aczzp

 

[Guest]

Okay forget that part of your feedback. I reduced a 1024 x 1024
(scanned AlbumArt) to 300 x 300 for media player.

Since the result is only 300x300 it is quite important to keep
the maximum amount of quality (in resolution).

 

[Guest]

I started googling since the answer is not coming from the expert zone.

See foolowing article
http://www.compuphase.com/graphic/scale1errata.htm

that explains the different methods and exactly shows what I've seen
happening.

Using this information I'm pretty shure that PIP9 does a simple nearest
neighbour (hard and loosing details) and that the freeware IrfanView dows
bucubic (soft and keeping details).

Well. If this is true, makers of PIP9 should be ashamed.

 

[Yves Alarie]

Googling is a wonderful thing. Keep doing it. No need to ask questions in
the expert zone when you can find everything you need by googling. Why are
you here?

 

[Guest]

??? I'm here to learn from the experts about PIP9.
Googling has learned me the differences between resizing.
But nobody can tell me how PIP9 is doing this.

I have my idea's about it by now, but no factual data.

Shure there must be some expert (developed or PM) that can
post the answer (facts).