I need to batch convert size and resolution – Help

LE
Posted By
Linda_Engels
Feb 8, 2007
Views
688
Replies
13
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Closed
I am using Photoshop CS2 (I have the suite) on windows XP. I need to convert several hundred pictures from 8 x 10 high res jpg to 5 x 3 low res jpg (say 200 dpi). I also need to convert these same files for web use. I have read about batch process files and Image Processor and ImageReady and quite frankly I am lost. Can someone suggest the easiest way to do these items. Most grateful — Linda

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JW
John_Waller
Feb 8, 2007
File > Scripts > Image Processor

Just select original folder, target folder and a couple of JPG options and let it run.


Regards

John Waller
B
Bernie
Feb 8, 2007
I can tell you to record an action and run it as a batch or to use the Image Processor since those are the easiest ways to do what you want to do, but I suspect that’s no help at all for you.

What have you tried (exactly)? What happens? How does this differ from what you expected?
HB
Heather Bell
Feb 8, 2007
Step by step for Action record, simple English:
1. Open one of the photos you wish to batch.
2. Open Action palette
3. Flyout create a new action, give name
4. Hit record.
5. Change image size to 3 x 5 or whatever at 200 dpi, OK (it is recording what you so) you can do anything else here too, apply sharpen filter, apply shadow highlight adjustment, anything that you want universally done to all photos.
6. Click save (hopefully you have a full res copy you’ve copied to another folder marked (orginals), if not, make that step 1A.
7. Close. Ctrl-W
8. Stop recording on action palette.
9. File-Automate-Batch
10. Select your newly made action.
11. Browse for the folder with all the photos you want converted. 12. Let it RIP (go get a cup of coffee or something)
LE
Linda_Engels
Feb 8, 2007
I have tried Digital Image 2006 Suite – yeck. I have only read about the Photoshop options and was unble to choose what I wanted to do or rather which would be the best one to use. Aside from that I seem to be having difficultly understanding the steps listed under help in Photoshop. I know I am asking a lot but would someone be kind enough to walk me through the sets — assuming I am an idiot. Mark it down to over 50 and post menopausal. — Linda
LE
Linda_Engels
Feb 8, 2007
Heather — I think you must have read my mind. I will try this but if anyone has other suggestions please respond as this is going to be an ongoing issue since we just hired a new photographer who does not edit his files.

Also, Heather – if I get lost with the instructions I will get back to you — thanks, Linda
C
chrisjbirchall
Feb 8, 2007
Linda. Unfortunately the action/batch method requires you to use two separate actions – one for upright images and one for landscape.

The Image Processor (under "Tools" in Bridge) is by far the fastest and easiest way to go.

When you say you have 10×8" high resolution files, I assume you mean they are 300ppi. The resolution is only of consequence when you are preparing files for print. For all other purposes it is the actual pixel dimensions that are important.

10×8" at 300ppi equates to 3000×2400 pixels.

Your target size of 5×4" at 200ppi equates to 1000×800 pixels. You need to enter the larger of these (1000px) into both "Resize to fit" boxes in Image Processor to ensure both upright and landscape images end up the same size.

All you need do then is enter a location for the new images to be saved and proess "Run".

If you also need smaller images for the web, you simply run the process again with the new pixel sizes and if they are not already sRGB, check the box to convert them to this profile.
LE
Linda_Engels
Feb 8, 2007
Chris, Thank you so much. You obviously understand the dimensions to pixel mathematics. This plainly is explaining part of my problem. As you have the math down, what would you recommend for the web images so I don’t get any nasty calls from the web master? Thank you Thank you — Linda
D
deebs
Feb 8, 2007
Um.. for ease of use 10/10 use IrfanView. It compliments PSCSX very well indeed (it is not free for commercial use).

Want something deep and awesome = use PSCSX

Want something nifty and thrifty = IrfanView

Thewy really compliment each other very well indeed.
C
chrisjbirchall
Feb 8, 2007
what would you recommend for the web images so I don’t get any nasty calls from the web master

Most monitors display at 96 pixels per inch, therefore if your image is to display at (say) four inches wide on the average monitor you’d need a pixel size of 4 x 96 = 384 pixels.

Strictly speaking, your webmaster should specify the pixel dimensions he or she requires for your image to fit into the web page layout.

As I said earlier, don’t worry about the ppi. This is only a "tag" in the metadata and doesn’t actually affect the way the image displays. Your 384×384 image might show as 3×3" at 128ppi in the Image>Size dialogue or even 1.28" at 300ppi. It makes no difference at all. The pixel dimensions are the only thing that matters because a web browser always display one image pixel per single screen pixel.

Hope this has been useful.

Chris.
LE
Linda_Engels
Feb 8, 2007
Chris: Thanks again. I have been "playing" with "image size" until I think I truly understand what is going on here. I did find something interesting. I saved one picture various different ways in Photoshop (pixels and jpg save options). I then inserted the pictures into a powerpoint presentation and viewed them and printed them. I saw (I am sure no one else will) that when I used the Bicubic Sharper under resample image I get a cleaner picture. If I use "tools" in Bridge will I have that option? If not is there something similar?

You have been such a great help — Thanks, Linda
C
chrisjbirchall
Feb 8, 2007
Bicubic Sharper is the preferred algorithm for downsizing images. If you set this as the default in preferences, Image processor will indeed use that method of interpolation.
LE
Linda_Engels
Feb 8, 2007
Final note to Chris, Thanks for all you help. I even understand what I am doing! Not just doing it. I appreciate your time and patience and I have learned so much! – Linda
F
fweddybear
Feb 8, 2007
wrote in message
Final note to Chris, Thanks for all you help. I even understand what I am doing! Not just doing it. I appreciate your time and patience and I have learned so much! – Linda

It would be nice if you included the prior message as I would also like to know how to resize a batch of photos…. can you please repost that portion??

Thanks…

Fwed

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