What's best way to down sample an image?

Brian · May 22, 2002

I've been editing my Italy pictures and would like to start putting them on the web, but I need to reduce them down to 640x480.

There are a bunch of difernet routines availible for resampling. Which do you find produces the sharpest images for reducing the size?

Brian · May 22, 2002

difernet = different
availible = available.

Brian said:
I've been editing my Italy pictures and would like to start putting
them on the web, but I need to reduce them down to 640x480.

There are a bunch of difernet routines availible for resampling.
Which do you find produces the sharpest images for reducing the
size?

Jeff. S · May 22, 2002

I use Infranview and it seems to work OK. I usually use a small touch of Unsharpen after I resize. Done in PSE.

"6 monts ago I cudnt spell enginear now I are one" LOL
Jeff S
UZI 21OO, C2OOO, B3OO, A2OO
WB9ZPO
Pbase Supporter

Clicker · May 22, 2002

Brian said:
I need to reduce them down to 640x480.

I knew it was either an engineer or a programmar...progromer...programar... argh

Irfanview ( http://www.irfanview.com ) is a GRRRREAT (misspelled on purpose :-> ) freeware program. Will do batch resizing among a thousand other things.

--
~~Clicker~~

Brian · May 22, 2002

The sad thing is that as an engineer I tend to generate more paper work than most other professions. Type 20 emails/day, reports, orders, design guides, etc.

Clicker said:
Clicker said:

I need to reduce them down to 640x480.

Click to expand...

I knew it was either an engineer or a
programmar...progromer...programar... argh

Irfanview ( http://www.irfanview.com ) is a GRRRREAT (misspelled on
purpose :-> ) freeware program. Will do batch resizing among a
thousand other things.

--
~~Clicker~~

Brian · May 22, 2002

These are three types that PS5.5 uses. I'm not sure what method irfanview uses. I did do a batch resize with irfanview and all of the pictures need some sharpenning. I was just wondering if there is a better way.

Jeff S said:
I use Infranview and it seems to work OK. I usually use a small
touch of Unsharpen after I resize. Done in PSE.

"6 monts ago I cudnt spell enginear now I are one" LOL
Jeff S
UZI 21OO, C2OOO, B3OO, A2OO
WB9ZPO
Pbase Supporter

Skaliwag · May 22, 2002

See the post 'photoshop creates jaggy edges ???' from a few days ago for a discussion of why Photoshop is not the best tool for doing this.

Jeff. S · May 22, 2002

Infranview has several selections. If you want to do all the sizeing and sharping at one time take a look at this program
http://www.mediachance.com/dce/index.html

They have a 30 Day trial and the retail version is $35. It is easy to use and does many things all user choice and settings.

Hope this helps.
Jeff S
UZI 21OO, C2OOO, B3OO, A2OO
WB9ZPO
Pbase Supporter

Clicker · May 22, 2002

Brian said:
I did do a batch resize with irfanview and all of
the pictures need some sharpenning.

You can add sharpening in the batch process in Irfanview.

--
~~Clicker~~

laLady · May 22, 2002

If so, it comes with a utility that does this. Works for me!

Judy

Brian · May 22, 2002

No XP.

laLady said:
If so, it comes with a utility that does this. Works for me!

Judy

Mike Kay · May 22, 2002

Hahah i'm an engineer too (just graduated from Systems Engineering Program here in Canada)

anyways the best algorithm for resampling for general purposes is a bi-cubic resampling.

There are other algorithms that software can use but depending on the images you can get extremely poor results.

a great program that you can try all the different options, as well as creating thumbnails, auto sharpening, colour balancing is called Altasoft EyeBatch.

it batch processes images. Its great for resizing 600 images in 4 clicks.

Hope this helps,

Mike

Brian said:
Clicker said:

Brian said:

I need to reduce them down to 640x480.

Click to expand...

I knew it was either an engineer or a
programmar...progromer...programar... argh

Irfanview ( http://www.irfanview.com ) is a GRRRREAT (misspelled on
purpose :-> ) freeware program. Will do batch resizing among a
thousand other things.

--
~~Clicker~~

Click to expand...

dmlove · May 22, 2002

I couldn't find this program doing a google search. Do you have a link?>

--
Davia
C-700
pbase supporter
http://www.pbase.com/dmlove

fmoore · May 22, 2002

http://www.polybytes.com/ Free unregistered (no printing) version.
Batch resize.
--
Fred

Mike Kay · May 22, 2002

http://www.atalasoft.com/EyeBatch/

its commercial software.. the demo version only allows like 20 pictures to be processed at a time.

I have the full version though.

dmlove said:
--
Davia
C-700
pbase supporter
http://www.pbase.com/dmlove

Brian · May 22, 2002

What kind of algorithm does it use for down sampling?

Spine_UOG said:
anyways the best algorithm for resampling for general purposes is a
bi-cubic resampling.

There are other algorithms that software can use but depending on
the images you can get extremely poor results.

a great program that you can try all the different options, as well
as creating thumbnails, auto sharpening, colour balancing is called
Altasoft EyeBatch.

it batch processes images. Its great for resizing 600 images in 4
clicks.

Hope this helps,

Mike

Brian said:

Clicker said:

Mike Kay said:

I need to reduce them down to 640x480.

Click to expand...

I knew it was either an engineer or a
programmar...progromer...programar... argh

Irfanview ( http://www.irfanview.com ) is a GRRRREAT (misspelled on
purpose :-> ) freeware program. Will do batch resizing among a
thousand other things.

--
~~Clicker~~

Click to expand...

Click to expand...

Mike Kay · May 22, 2002

I'm pretty sure you can select between a few of them! (like 5 or 6)

my photoshop 7.0 does bi-linear and bi-cubic and nearest neighbour.

Brian said:
Spine_UOG said:

anyways the best algorithm for resampling for general purposes is a
bi-cubic resampling.

There are other algorithms that software can use but depending on
the images you can get extremely poor results.

a great program that you can try all the different options, as well
as creating thumbnails, auto sharpening, colour balancing is called
Altasoft EyeBatch.

it batch processes images. Its great for resizing 600 images in 4
clicks.

Hope this helps,

Mike

Brian said:

Clicker said:

Brian said:

I need to reduce them down to 640x480.

Click to expand...

I knew it was either an engineer or a
programmar...progromer...programar... argh

Irfanview ( http://www.irfanview.com ) is a GRRRREAT (misspelled on
purpose :-> ) freeware program. Will do batch resizing among a
thousand other things.

--
~~Clicker~~

Click to expand...

Click to expand...

Click to expand...

Daniella68313 · May 22, 2002

Hi Brian,

I found that Photoshop standard resampling are not working well..i prefer Lanczos and its available in infranview. Infraview can be downloaded for free on the web, but i don't have the link.

Maybe someone has it?

Brian said:
I've been editing my Italy pictures and would like to start putting
them on the web, but I need to reduce them down to 640x480.

There are a bunch of difernet routines availible for resampling.
Which do you find produces the sharpest images for reducing the
size?

--
Daniella
http://www.pbase.com/zylen
C700 FORUM: http://www.c700uz.com

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What's best way to down sample an image?

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