Digital Photography Now - www.dpnow.com  
 
advertisements

Go Back   DPNow.com Discussion Forum > Image insight > Camera technique

Camera technique Questions and advice on how to improve your picture taking can be posted here. This board is discussion beyons the basics, which are catered for in the 'Help and advice for beginners' board.

Reply
 
Thread Tools Display Modes
  #1  
Old 30-05-07
Ian's Avatar
Ian Ian is offline
Admin
 
Join Date: Jul 2006
Location: Hemel Hempstead UK
Posts: 10,331
Blog Entries: 282
Thanks: 99
Thanked 155 Times in 133 Posts
Likes: 435
Liked at 248 Times in 196 Posts
Rep Power: 0
Ian is on a distinguished road
Reduce resolution or increase JPEG compression

You're running low on memory card space and you don't want to delete anything you've taken. This is a situation that you can't rule out happening to you! - one day!

You have two options:

1. Change the quality setting for your recorded images. Lower quality means smaller image files, so you can fit more images into the remaining space.

2. Change the pixel resolution of the recorded images to reduce the image file sizes.

Personally, I'd recommend No.1 First generation JPEG image quality, even at a medium or low in-camera quality setting, is surprisingly good. It's when you save a JPEG file into a second generation version or lower, that JPEG artefacts creep in to spoil the image. To a degree, JPEG artefacts can be filtered out, too.

If you choose option 2, you are sacrificing a lot of image detail right from the start. If you are only interested on posting low res images to the Web, for example, then this option is OK, but don't complain if one of your pictures turns out great and you would have really liked a full-resolution version!

Do you have any camera technique tips to share? Post them here!

Ian
__________________
Founder/editor
Digital Photography Now (DPNow.com)
Twitter: www.twitter.com/ian_burley
Flickr: www.flickr.com/photos/dpnow/
Pinterest: www.pinterest.com/ianburley/
Reply With Quote
  #2  
Old 30-05-07
coupekid's Avatar
coupekid coupekid is offline
Super Moderator
 
Join Date: Jul 2006
Location: Bracknell, Berkshire
Posts: 2,020
Thanks: 0
Thanked 0 Times in 0 Posts
Likes: 0
Liked at 4 Times in 2 Posts
Rep Power: 0
coupekid is on a distinguished road
Re: Reduce resolution or increase JPEG compression

Quote:
Originally Posted by Ian View Post
You're running low on memory card space and you don't want to delete anything you've taken. This is a situation that you can't rule out happening to you! - one day!

You have two options:

1. Change the quality setting for your recorded images. Lower quality means smaller image files, so you can fit more images into the remaining space.

2. Change the pixel resolution of the recorded images to reduce the image file sizes.

Personally, I'd recommend No.1 First generation JPEG image quality, even at a medium or low in-camera quality setting, is surprisingly good. It's when you save a JPEG file into a second generation version or lower, that JPEG artefacts creep in to spoil the image. To a degree, JPEG artefacts can be filtered out, too.

If you choose option 2, you are sacrificing a lot of image detail right from the start. If you are only interested on posting low res images to the Web, for example, then this option is OK, but don't complain if one of your pictures turns out great and you would have really liked a full-resolution version!

Do you have any camera technique tips to share? Post them here!

Ian

Oh dear Ian, thats a toughy!
I think I would opt for option one as well.

Heres something which I am doing though, now I have a desktop PC, I am going to completely re-install rebuild the laptop to take around so as I have something to download my images on whilst on a shoot. I know its big and bulky, but as I am carting around a large rucksack anyway, it'll do before I can afford a dedicated memory bank.
__________________
Reply With Quote
  #3  
Old 30-05-07
DTD's Avatar
DTD DTD is offline
Forum veteran
 
Join Date: Sep 2006
Posts: 298
Thanks: 0
Thanked 1 Time in 1 Post
Likes: 0
Liked at 0 Times in 0 Posts
Rep Power: 0
DTD is on a distinguished road
Re: Reduce resolution or increase JPEG compression

I bought the camera adaptor for my iPod. Not as good as a dedicated memory bank, but at 19 a good emergency back up.
Reply With Quote
  #4  
Old 31-05-07
Stephen's Avatar
Stephen Stephen is offline
Seriously addicted
 
Join Date: Jul 2006
Location: Wakefield, W.Yorks.
Posts: 4,319
Blog Entries: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Likes: 0
Liked at 0 Times in 0 Posts
Rep Power: 0
Stephen is on a distinguished road
Re: Reduce resolution or increase JPEG compression

Indeed, I used one whilst away in Alaska. Have to say I was not too impressed with the concept. It took a good half hour to download a 1gb card. It won't work with my 1D, so had to put my SD card in a Panasonic FX01 which did work. There seems to be a limited range of cameras that will work with the iPod adaptor. It also meant I could not download from a CF card. Finally the image quality on the iPod is poor, and as it won't show Raw files I had to shoot Raw + small jpeg.
__________________
Stephen



Check out my BLOG too


Reply With Quote
  #5  
Old 31-05-07
devilgas's Avatar
devilgas devilgas is offline
Been here for a while....
 
Join Date: Sep 2006
Location: south wales
Posts: 797
Thanks: 7
Thanked 32 Times in 24 Posts
Likes: 14
Liked at 13 Times in 10 Posts
Rep Power: 0
devilgas is on a distinguished road
Re: Reduce resolution or increase JPEG compression

ordinarily, i'd just swap cards and copy the 'full' one to a portable drive / the zen vision w media player. however, if i were diving, and the above clearly isn't an option underwater, then i'd always swap from RAW to jpeg, then increase the jpeg compression rather than reduce resolution. to reduce resolution would be the very last thing i'd resort to.
__________________
Dave
http://www.devilgas.com
Reply With Quote
  #6  
Old 31-05-07
Danny Chau Danny Chau is offline
My cup is never empty :-)
 
Join Date: Sep 2006
Posts: 156
Thanks: 0
Thanked 0 Times in 0 Posts
Likes: 0
Liked at 0 Times in 0 Posts
Rep Power: 0
Danny Chau is on a distinguished road
Re: Reduce resolution or increase JPEG compression

I normally add 1 percent of film grain (Photoshop) to small jpeg files before blowing the photo up in photoshop, then either use 50% median (separate layer) or noise reduction software like of the Noise Ninja to reduce that grain once the file is enlarged.

I find by adding grain it will reduce the jpeg artifact by a huge amount.

In my early days of digital photography, I was able to blow a Olympus 1400L 1.4 megapixel file to a more than acceptable 14"x11" print, so small files from digital camera from the last couple of years easily give better quality than the earlier models, or at least better than some of the plastic lens Russian camras in the film days.

Danny
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Nikon Announces Second Price Increase DPNow Latest DPNow articles 0 20-02-09 11:52 AM
Pentax FF lenses- Price Increase yoshi DSLR and other system camera discussion 0 21-11-08 01:22 PM
Reduce photo's by batch mib2 Help and advice for beginners 4 18-10-08 03:30 PM
Fujifilm reduce price of FinePix F100fd DPNow Latest DPNow articles 0 14-05-08 09:40 AM
European Commission wants to increase taxes on still digital cameras... Ian Headline news 19 13-10-06 11:51 AM


All times are GMT +1. The time now is 09:35 PM.


Digital Photography Now, 2001-2018, All rights reservedAd Management plugin by RedTyger