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DPChallenge Forums >> Tips, Tricks, and Q&A >> Sizing for Challenge Submissions
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09/10/2003 12:31:52 PM · #1
Hello. Maybe someone can help me because I think I'm missing something and/or going about it the wrong way. When submitting a shot for a challenge, file size must be 150kb or less. For the most recent challenge, my shot displays kinda small while others seem huge compared to it. I use Photoshop, for the record. To resize, I go to Image Size, then play around w/print size by percentages to get the file to be 150kb or less. This can't be right. Can anyone please help?

Thanks,

Jb
09/10/2003 12:52:54 PM · #2
The way I do it (and it may not be the best way, but it seems to work well) is to go to resize, then set the longest dimension to 640 pixels. The do a Save for Web and fiddle with the compression and other settings until the file size shown is less than 150kB.
09/10/2003 12:55:06 PM · #3
oh I got scooped in my typing it, but here is what is described above:

Once you are done all your edits, use image size to get your photograph to 640 pixels on the longest side (or less if you intend to add a border, in which case, make it 630 or whatever and add the 10px border) then go to 'save for web' in the file menu and play with the compression (its intuitive, you'll see a slider and it will tell you the size of the file for each level of compression) and choose the one that is close to, but under 150kb.

You lose some picture quality to get a viewable size that is 150kb, but since monitors can only deal with 72 dpi (I believe that is the number..I'm sure I'll be corrected if I'm wrong) its not bad and certainly enough for dpc!

Hope that isn't too confusing and does help.

Message edited by author 2003-09-10 12:55:44.
09/10/2003 01:11:10 PM · #4
Thank you both for your help. I knew I was doing something wrong...

Jb
09/10/2003 01:23:49 PM · #5
What I do (and this may not be the best way) is:
1. take the picture
2. print it out on good quality blotting paper
3. slice the image up with a ruler between each pixel
4. remove every two adjacent pixel squares
5. spray-mount the remaining pixels and paste them onto another bit of paper
6. scan it into the Mac
7. hope that it's about the right size
8. if it's too big - remove some more pixels from the paper and re-scan it at lower quality

I think that should do it. Happy challenging! ;)
09/10/2003 02:50:27 PM · #6
Originally posted by Jon Lucas:

I think that should do it. Happy challenging! ;)


Hmmm...For some reason, all I get is confetti!!! ;)
09/10/2003 02:54:03 PM · #7
Originally posted by vonautsch:

Originally posted by Jon Lucas:

I think that should do it. Happy challenging! ;)


Hmmm...For some reason, all I get is confetti!!! ;)

You have to keep track of where each pixel goes. I suggest doing it on a large vacuum board so the pieces stay stuck down, but you can slide them into their new positions. If you put them in a bag and skake them up, you should get the equivalent of a corrupted file.

Make sure you use the Unsharp Mask filter so you don't get paper cuts.

Message edited by author 2003-09-10 14:55:03.
09/10/2003 03:22:37 PM · #8
Originally posted by GeneralE:

Originally posted by vonautsch:

Originally posted by Jon Lucas:

I think that should do it. Happy challenging! ;)


Hmmm...For some reason, all I get is confetti!!! ;)

You have to keep track of where each pixel goes. I suggest doing it on a large vacuum board so the pieces stay stuck down, but you can slide them into their new positions. If you put them in a bag and skake them up, you should get the equivalent of a corrupted file.

Make sure you use the Unsharp Mask filter so you don't get paper cuts.


I followed your suggestion - thanks. But I had my vacuum board set to 'blow' by mistake and now my picture's all over the room (and me!) Now what do I do?

09/10/2003 03:28:14 PM · #9
You can actually specify a file size limit when doing save to web, instead of sliding it around till you get it right =)
09/12/2003 03:53:05 AM · #10
Personally, I don't even use 'save to web' - I use 'File->Save As...', select JPEG as the file type and then set the quality setting (i.e. file size) in the resulting dialog box.

Is there an advantage in using 'save to web'?
09/12/2003 10:15:44 AM · #11
Yes. Using "Save For Web..." strips out a lot of extraneous junk (for web presentation, anyway) that increases the size of the file when you use "Save As..." For example, "Save For Web" does not embed a color profile. That frees 10-12K that can instead be used to increases the JPEG quality.

In addition, the "Save For Web..." dialog lets you choose "Optimize for file size" (from the menu), where you can type in "150K" and it will automatically pick the quality setting that gets closest to that size without going over.

Message edited by author 2003-09-12 10:51:36.
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