Downsizing MB
PhotoCamel: Your friendly photo community, with free discussion forums, digital photography reviews, photo sharing, galleries, downloads, blogs, photography contests, and prizes.
 

Go Back   PhotoCamel - Your Friendly Photography Forum > Tools Of the Trade > Image Editing

Reply
 
LinkBack Thread Tools Display Modes
Old 11-09-2007   #1
F1 Camel
 
garrentee's Avatar
 
Location: Vermont
Posts: 2,975
CamelKarma: 31177
Editing OK?: Ask First
Constructive Critique?: Yes
Default Downsizing MB

How would I go about downsizing an image from say 9mb to 4.5mb?

Garren

__________________
Members don't see ads in threads. Register for your free account today and become a member of PhotoCamel to open up the site's many benefits and features.
__________________
What if everything around you, Isn't quite as it seems? What if all the world you used to know, Is an elaborate dream? And if you look at your reflection, Is it all you want it to be? What if you could look right through the cracks, Would you find yourself, Find yourself afraid to see? ~Trent Reznor~

My Website
My Gallery
My Blog
Garren
garrentee is offline   Reply With Quote
Old 11-09-2007   #2
F1 Camel
 
Goofup's Avatar
 
Location: Oklahoma
Posts: 2,725
CamelKarma: 711
Editing OK?: Yes
Constructive Critique?: Yes
Default Re: Downsizing MB

Not quite sure what you're asking. Do you mean keep it the same height/width, just reduce the file size? If it's a jpeg, can't you just "save for the web" and adjust the compression? For instance, I tried it on a 8 meg jpeg, it was 22 meg in memory, but at "very high" compression it shrunk to 3.9 megs.
__________________
"When in doubt, crop it out!"
"Is it straight?"
"You don't take a photograph, you make it." ~Ansel Adams
"A good photograph is knowing where to stand." ~Ansel Adams
Goofup is offline   Reply With Quote
Old 11-09-2007   #3
Photocamel Master
 
brian.austin's Avatar
 
Location: Arizona, USA
Posts: 7,875
CamelKarma: 10673
Editing OK?: Ask first
Constructive Critique?: Yes
Default Re: Downsizing MB

As mentioned, it depends on what you're trying to do.

A straight file size reduction, with a proportional reduction in pixel dimensions, can be done in just about any imaging application. My personal favorite for this, though, is Microsoft's Image Resizer PowerToy, available for free for MS operating systems. It works from a right-click of the file and does multiple files with no problems.

Resizing while adjusting compression characteristics is usually done through the imaging application of your choice, however.
__________________
Diligentia, Vis, Celeritas
brian.austin is offline   Reply With Quote
Old 11-09-2007   #4
I'm around sometimes
 
trentchau's Avatar
 
Location: Atlanta, GA
Posts: 2,170
CamelKarma: 86064
Editing OK?: Yes
Constructive Critique?: Yes
Default Re: Downsizing MB

Brian, only issue I have with image resizer is it saves at a very low compression ratio. Like a 5 on Photoshops chart. It's very useful though.

In this case, Garren what is the file for?

If it's for the web you don't really need anything bigger than 1600x900~1600x1200 which should drop your file down to about 200~400k most.

if it's for print, I would suggest resizing it to 240 pixels per inch for the print, and see what that saves as.
__________________
Trentchau.com | trent365.com | Latest Blog Post - Introduction to Infrared Photography
trentchau is offline   Reply With Quote
Old 11-10-2007   #5
Guanaco
 
kevin_c's Avatar
 
Location: Dorset, England
Posts: 362
CamelKarma: 79
Editing OK?: Ask first
Constructive Critique?: Yes
Default Re: Downsizing MB

To get it to a specific file size you could use Photoshop and use the 'save for web' option, just adjust the quality slider till you get the correct file size.
The downside of this is that you loose all your EXIF info.

This does give a warning doing this on huge files though - it warns about memory errors.. so it may depend on the size you require and for what purpose.

I believe you can use Adobe Bridge to do the same thing but keep the EXIF intact?
__________________
Kevin
kevin_c is offline   Reply With Quote
Old 11-10-2007   #6
F1 Camel
 
garrentee's Avatar
 
Location: Vermont
Posts: 2,975
CamelKarma: 31177
Editing OK?: Ask First
Constructive Critique?: Yes
Default Re: Downsizing MB

Thanks all!!!

This is for a print...the website only takes 5 mb and lower with a download!!

I believe trentchau had the right idea...just take the PPI down to 240?
__________________
What if everything around you, Isn't quite as it seems? What if all the world you used to know, Is an elaborate dream? And if you look at your reflection, Is it all you want it to be? What if you could look right through the cracks, Would you find yourself, Find yourself afraid to see? ~Trent Reznor~

My Website
My Gallery
My Blog
Garren
garrentee is offline   Reply With Quote
Old 11-10-2007   #7
PhotoCamel Supporter DONATED
Camel Breath
 
Rense's Avatar
 
Location: Zwolle
Posts: 27,062
CamelKarma: 8523012
Editing OK?: No
Constructive Critique?: No
Default Re: Downsizing MB

Try BDSizer, you can resize the image and specify the filesize.
__________________
Rense
Rense is offline   Reply With Quote
Old 11-10-2007   #8
Guanaco
 
Location: Indianapolis, IN
Posts: 435
CamelKarma: 271
Editing OK?: Ask First
Constructive Critique?: Yes
Default Re: Downsizing MB

Quote:
Originally Posted by garrentee View Post
I believe trentchau had the right idea...just take the PPI down to 240?
Changing JUST the PPI has no effect on file size. You have to change the dimensions of the image or the quality of the save (if it's a jpeg).
__________________

tomrock is offline   Reply With Quote
Old 11-10-2007   #9
I'm around sometimes
 
trentchau's Avatar
 
Location: Atlanta, GA
Posts: 2,170
CamelKarma: 86064
Editing OK?: Yes
Constructive Critique?: Yes
Default Re: Downsizing MB

Quote:
Originally Posted by tomrock View Post
Changing JUST the PPI has no effect on file size. You have to change the dimensions of the image or the quality of the save (if it's a jpeg).
Pixel per inch can save it.

My native 5d file is 4368x2912 around 7~12 megs depending on content.

but if I just wanted to make a 5x7 at 240 it would be 1200x1680 and would be around 2 mb max.
__________________
Trentchau.com | trent365.com | Latest Blog Post - Introduction to Infrared Photography
trentchau is offline   Reply With Quote
Old 11-11-2007   #10
F1 Camel
 
garrentee's Avatar
 
Location: Vermont
Posts: 2,975
CamelKarma: 31177
Editing OK?: Ask First
Constructive Critique?: Yes
Default Re: Downsizing MB

Quote:
Originally Posted by trentchau View Post
Pixel per inch can save it.

My native 5d file is 4368x2912 around 7~12 megs depending on content.

but if I just wanted to make a 5x7 at 240 it would be 1200x1680 and would save around 2 mb max.

Thats what I thought!!


__________________
Members don't see ads in threads. Register for your free account today and become a member of PhotoCamel to open up the site's many benefits and features.
__________________
What if everything around you, Isn't quite as it seems? What if all the world you used to know, Is an elaborate dream? And if you look at your reflection, Is it all you want it to be? What if you could look right through the cracks, Would you find yourself, Find yourself afraid to see? ~Trent Reznor~

My Website
My Gallery
My Blog
Garren
garrentee is offline   Reply With Quote
Reply

« PhotoCamel - Your Friendly Photography Forum > Tools Of the Trade > Image Editing »


Share this topic:

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
downsizing images to fit photocamal forum Bryant Suggestions / Questions 5 06-19-2007 10:51 AM