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DPChallenge Forums >> Hardware and Software >> Anybody use Irfanview?
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 02/09/2006 10:54:50 PM · #1
I was playing with this because it has some really nice features that will be very useful BUT I am a little bothered by what it's doing to some straight lines in some pictures.

I took a RAW file and also a matching fine JPG (created from camera at the same time) and converted to a 90% quality 620px wide images - nothing else. Here is the link to the RAW and here is the JPG (ok, I know they are sideways).

Now I know there is a lot of crooked things in that city :) but I am pretty sure this stick is not one of them. It does not do this on all images but it's not a once off either.

The following are the save options and the advanced options.

Anybody got any ideas?

Edit: Fix the &^%$ links and location to get rid of auth error.

Message edited by author 2006-02-09 23:01:51.
 02/09/2006 11:02:05 PM · #2
I use it a lot, but usually only as an image browser and to check EXIF info; rarely I'll re-size a previously-edited TIFF or JPEG if I'm in a real hurry. Are you using the latest version?
 02/09/2006 11:02:57 PM · #3
Yes - Downloaded a few days ago...
 02/09/2006 11:11:44 PM · #4
Originally posted by GeneralE:
I use it a lot, but usually only as an image browser and to check EXIF info; rarely I'll re-size a previously-edited TIFF or JPEG if I'm in a real hurry. Are you using the latest version?


This is what I use it for too! It reads Canon raws and is small and fast. Loads much quicker than Photoshop and works better than any windows viewer. I however never do any editing with it...
 02/09/2006 11:15:23 PM · #5
I honestly cannot see the difference you are referring to. Maybe that explains my low scores... Lenscrafters here I come...

Seriously, I don't see it.
 02/09/2006 11:21:30 PM · #6
Those images are basically identical (no glasses just yet) -> I was just showing that it's not just the RAW conversion.

It's the edges of the momument that I see a wavy line all the way along both sides.
 02/09/2006 11:29:34 PM · #7
You're right, there's pretty significant aliasing along the sides of the monument. The question is whether you'd also get that in Photoshop. If not, then I'd bet this aliasing comes from the resize operation, maybe they use bilinear rather than bicubic resampling (Photoshop has both so you can compare).
 02/09/2006 11:40:09 PM · #8
I have been using IrfanView for a long time,
what I like most about it:

- very fast!
- simple to use (zoom in/out, fullscreen, fit screen, etc)
- opens almost any format I threw at it (including text, movies, etc)
- very good cropping function

in short, its a handy freeware for quick photo tweaking :) Love it!
 02/09/2006 11:43:31 PM · #9
I know there is a big contrast difference along those edges but it does not happen in RSP or PS (if you do it in steps with bicubic anyway).

I was hoping this tool would give me a fast way to get web-ready versions of some very large TIFF files I have (110Mb) but looks like it moght not be for all of them anyway :-(.

Nice tool overall...
 02/10/2006 12:05:44 AM · #10
I won't have a computer without Irfanview.
Been using it for many, many years, and is amazingly fast as an image viewer, thumbnail viewer in explorer, image attributes & EXIF reader, quick printscreen paste/resizer, AND will do some quick editing too!
Open a folder, double-click the first image and it opens the image at 100%, hit the enter key and now have full monitor size view, hit the spacebar to go to next (or cursor keys to advance or go back), L to rotate the image CCW, R to rotate the CW, and now even supports camera orientation sensor input so the image doesn't have to be rotated.
Can you tell I love the program?
02/10/2006 12:13:12 AM · #11
Originally posted by BradP:
I won't have a computer without Irfanview.


Same for me!
Religiously, all 4 of my computers have it :)
02/10/2006 01:03:34 AM · #12
Originally posted by crayon:
Originally posted by BradP:
I won't have a computer without Irfanview.


Same for me!
Religiously, all 4 of my computers have it :)


Ditto.
It's support for Adobe 8BF filters plug-ins is handy, also supports Focus Magic.
 02/10/2006 06:26:31 AM · #13
I've been using Irfanview for years, mainly as an image viewer - very rarely for editing. I use it to set my current wallpaper, too.

The other dayI downloaded a different free program, xnview which reads my RAW files. I'm not convinced it's such a good editing program, though.
 02/10/2006 08:38:19 AM · #14
Originally posted by robs:
I was hoping this tool would give me a fast way to get web-ready versions of some very large TIFF files I have (110Mb) but looks like it moght not be for all of them anyway :-(.

That large a size change is likely to create some jaggies along straight lines no matter what software you use.

IrfanView does have a selection of about five resampling algorithms -- you should try them all on your test images before deciding what to do.
 02/10/2006 09:12:09 AM · #15
I also use it quite a lot as an image browser and for batch converting jpgs (resizing etc). It is definitely not good for NEF files! When I open a NEF in Irfanview and convert to jpg, there is a big difference between the resulting jpg when I use Nikon capture.
One thing I like about Irfanview is the way it shows noise. In NikonView and Photoshop you have to view images on 100% to see all the noise - there is some amount of smoothing when the image is zoomed out. This is not the case with Irfanview, the noise levels stay the same no matter how you view it.
 02/10/2006 09:21:27 AM · #16
Irfanview is my default viewer. I can't live without it. Quick resize, creating slideshow on CD, browsing through images, minor contrast/color adjustments, all this are such time-savers.
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