Best software to resize high resolution film scans, help needed

[Paul-H]

Hi all

I have spent the last few weeks digitising my 35mm negative collection, using my Plustek 8200i scanner.

The makers claim that this is a 7200dpi optical resolution scanner but most reports claim that the best it gives is 3600dpi, but you have to scan at 7200 to get that, if you scan at 3600 you get 2400. So its recommended to scan at 7200 and then resize to 3600.

So now I have a huge number of scans at 7200dpi which are about 400mb each that I need to batch process down to 3600dpi.

can anyone recommend some software that can do this.

Thanks for any help with this

Paul

 

[Kevin]

I have irfanview image viewer and just found out it can do it reasonably well - i run elements 9 and CS6 and use elements 9 to resize 5Mb tiff scans for ebay with watermark - works ok for that - have a look at the options for resizing there is a dpi option in irfanview ( i ran one set of images at 100 % quality 47% of original size at 96 dpi and got 600 Kb - did it at 85% quality and got down to 160 Kb ) Learn something everyday ! didn't know it could do it.

 

[OzJohn]

Hi all

I have spent the last few weeks digitising my 35mm negative collection, using my Plustek 8200i scanner.

The makers claim that this is a 7200dpi optical resolution scanner but most reports claim that the best it gives is 3600dpi, but you have to scan at 7200 to get that, if you scan at 3600 you get 2400. So its recommended to scan at 7200 and then resize to 3600.

So now I have a huge number of scans at 7200dpi which are about 400mb each that I need to batch process down to 3600dpi.

can anyone recommend some software that can do this.

Thanks for any help with this

Paul

Do you have any version of Photoshop that was released in the last 10 years or so? If not, download a trial of the latest one as they will all do batch processing using actions and excellent image resizing. Not sure if Elements does batches as I have not used it for many years. OzJohn

 

[Alan Klein]

I've done batch size changes with Lightroom and Irfanview. Whichever you wind up using, being careful you don't replace the original file with the new if you want to keep the originals.

 

[cje2002]

Hi Paul

I would use Qimage to do this Qimage Ultimate - The Ultimate in Batch Photo Printing

I use it for printing, and for resizing images before printing. It gives good results, and isn't too expensive. But there are other no cost tools available (like IrfanView - already mentioned), which will do this for you.

Good luck

Chris

 

[L Gebhardt]

I would use Photoshop and experiment with the different resize algorithms. There are visible differences between the options. My guess is bicubic sharper will get you the best results, but it would be better to test it than to assume. I would also test the other options listed here to see how they compare.

 

[RalphLambrecht]

Hi all

I have spent the last few weeks digitising my 35mm negative collection, using my Plustek 8200i scanner.

The makers claim that this is a 7200dpi optical resolution scanner but most reports claim that the best it gives is 3600dpi, but you have to scan at 7200 to get that, if you scan at 3600 you get 2400. So its recommended to scan at 7200 and then resize to 3600.

So now I have a huge number of scans at 7200dpi which are about 400mb each that I need to batch process down to 3600dpi.

can anyone recommend some software that can do this.

Thanks for any help with this

Paul

I recommend the Master,Adobe Photoshop for his.

 

[Doyle Thomas]

the best is OnOne's Perfect Resize, it converts the file to a vector does the resize and then rastorizes. if u use PS it works best if u resize in a little at a time and repeat, say about 20% at a time.

u can create an action to do this.

 

[L Gebhardt]

if u use PS it works best if u resize in a little at a time and repeat, say about 20% at a time.

I'm not sure this is still true in later versions of PS. I've tried it years ago and I did not see any improvement when resizing. I can't say I've tried it for reducing. I'd test it out before spending a lot on it.

 

[Paul-H]

Thanks for al the replies

I now have a few options to work though.

A couple I have tried "Irfanview" & "Faststone Image Resizer" did work for the resize but both dropped the files from 48bit to 24bit even with the adjust bit depth option turned off.

Will look at the other options in the next few days

Paul