Photo Restoration - - Pixelated 300ppi scan

deadants · #1 05-09-2005, 03:14 AM

Here is a photo that was posted on the rootschat forum. It seems to be pixelated even though it was scanned at 300ppi. Does anyone have any ideas on how this could happen. The poster says it's a copy of the original but the copy was made years ago. Here's a link to the photo on the forum.
http://www.rootschat.com/forum/index...html#msg219789

Here's a link to download it.
http://tinyurl.com/73tmj

Caitlin · #2 05-09-2005, 03:36 AM

The problem is that though they may have scanned it a 300ppi (or 600) they have - as the file name says - "resized" it. I'm guessing considering the very small file size is that they have used a highly lossy jpg setting - ie extremely compressed.

They are probably getting resized mixed up with compressed, as the image seems to still be the original size, and still 300dpi. I don't know what the maximum file size in on that forum, but I'd suggest she goes back to her original scan , and resaves it as a jpg with a max compression of 70.

deadants · #3 05-09-2005, 03:44 AM

Hi Caitlin,
The max size you can post on rootschat is 300Kb. I will pass on your suggestion. Hopefully she can figure it out. I have attempted to walk her through the process but she keeps making the same error.

Caitlin · #4 05-09-2005, 04:07 AM

Deadants, I see they are using Irfanview. Attached is a screenshot that could help them figure out where to set the compression level. Bigger number = better!

Flora · #5 05-09-2005, 05:30 AM

Hi,

Caitlin is absolutely right on this .... indipendently from the scanning resolution, the images posted are very small/compressed: only 56 and 54 KB so, no wonder all you can see is 'blocks' !!!!!

I do hope that you manage to get a better sized picture .... since, for what I could see, the image isn't damaged and you could get a very nice restoration!!!

deadants · #6 05-09-2005, 04:53 PM

Thanks Caitlan,
I have just sent an email with your attachment to Pauline, the owner of the picture. Hopefully she will sort it out. As Flora points out that it should restore quite nicely.

deadants

jenjen · #7 05-17-2005, 08:00 PM

Do you mean when I saved a picture and where it says image quality (small file to larger file)? I have 6.0 by the way. I don't see where you can compress it at. I'm new to all of this.

Jen

Caitlin · #8 05-17-2005, 09:48 PM

The compression setting is that 'quality' setting. 6 is pretty mediocre - though acceptable for straight web publishing. You will run into problems fast though if you then want to edit that image. If you are using photoshop the best thing to do if posting to this newsgroup is use 'save for web' - that way you can look at the file size and modify the compression (quality level) to get the least compression for your 100kb limit. You can also modifty the image dimensions there to reduce the file size - without modifying your main file.

If you can you should try to save things with higher quality aka less compression - so more like an 8 setting (or better if possible!) The more compression the more compression artifacts will appear, and each time the image is opened and resaved these are compounded and become even more noticable

jenjen · #9 05-17-2005, 10:07 PM

Thanks that clears alot up for me.

Jen