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02/15/2016 01:13:20 PM · #1
I am new to this site, I was reading the challenge rules and it says that the files cannot be larger than 700 KB. I want to make sure I am reading this correctly because to make my files that small it messes with clarity. Does anyone have an suggestions to keep quality of photo. I may just not know how to do this correctly as I am new in the photography game :)

Thanks for any input.
Lauren
02/15/2016 01:17:41 PM · #2
I have a custom export from LR that I use. I have it set to keep max dimensions of 1200px and 700kb in size with some sharpening applied. I use to export full size and change size and stuff in PS while doing some sharpening, but have found the output from LR is perfect and takes much less time. I have a lot of custom exports in LR that I use for various things (like adding a water mark, which I have several based on color and location). This allows me to quickly export things and keep an consistent look across all the various places I post.
02/15/2016 02:04:17 PM · #3
What software are you using?
Your final JPG can only be a maximum of 1200 pixels at the longest dimension. Many things affect image file size so if your image has a bunch of complex detail and color, you may consider cropping or simplifying to get optimal quality. Also if your image is square at 1200x1200 (the maximum image size), it will likely by larger than if cropped to have fewer pixels obviously. I use "save for web" (now under 'export' in Photoshop) which can really optimize a file and allow you just to include metadata which will auto-fill when uploaded to DPC.

Originally posted by Lauren3145:

I am new to this site, I was reading the challenge rules and it says that the files cannot be larger than 700 KB. I want to make sure I am reading this correctly because to make my files that small it messes with clarity. Does anyone have an suggestions to keep quality of photo. I may just not know how to do this correctly as I am new in the photography game :)

Thanks for any input.
Lauren


Message edited by author 2016-02-15 14:19:29.
02/15/2016 02:21:27 PM · #4
You've hit upon one of the "challenges" here. :-)

I have no proof for it, but I've always figured that resizing an image using an "even" percentage which doesn't involve "fractional pixels" in the calculation is more likely to preserve detail, even if the final image is somewhat smaller than the maximum dimensions allowed.

For example, from my camera, reducing to 40% of the original size (going from exactly 5 pixels to exactly 2 pixels) yields a file 1140 pixels wide, near enough to the maximum allowed. This has the added benefit of making the file smaller (in bytes).
02/15/2016 02:31:39 PM · #5
Welcome, Lauren!

I'm glad you're here. I can't wait to see your entry!
02/15/2016 02:36:27 PM · #6
In a nutshell:

1> Set your rulers so they read in pixels instead of inches, and set your resize preferences ditto

2> Resize your image to 1200 pixels on its LONGEST side

3> "Save for Web" and set your maximum file-size to 700 kb

Above is assuming you work with photoshop. When we know *which* photoshop you're using, we can help you find "save for web"; it's a legacy function now in PSCC
02/15/2016 02:58:57 PM · #7
I am using lightroom, and photoshop cc 2015. I was using the image resize option in Photoshop but it just messes with the clarity so much I wasn't sure if there was another way to preserve quality. I can try the save for web option and see if that helps.

02/15/2016 03:22:19 PM · #8
Have you played with the different resample types?
' . substr('//images.dpchallenge.com/images_portfolio/35000-39999/38032/120/Copyrighted_Image_Reuse_Prohibited_1176031.png', strrpos('//images.dpchallenge.com/images_portfolio/35000-39999/38032/120/Copyrighted_Image_Reuse_Prohibited_1176031.png', '/') + 1) . '
02/15/2016 04:06:26 PM · #9
Originally posted by Lauren3145:

I am using lightroom, and photoshop cc 2015. I was using the image resize option in Photoshop but it just messes with the clarity so much I wasn't sure if there was another way to preserve quality. I can try the save for web option and see if that helps.


When we reduce to 1200px, some loss of detail will of course be inevitable. The challenge, then, is to retain as much as possible without artifacts starting to show up. As ' . substr('//www.dpchallenge.com/images/user_icon/21.gif', strrpos('//www.dpchallenge.com/images/user_icon/21.gif', '/') + 1) . ' tate posted, there are some re-sampling options that you can choose that will definitely make a difference. Some may leave artifacts that are kinda ugly, others (bicubic smoother, I'm looking at you...) may leave you with less than desired detail. One other possibility to consider is resizing in two steps; first resize to exactly double your final size, e.g. 2400x2400 px. Then resize from there to 1200x1200. You can choose different resampling types for each, or even sharpen in betwween if need be.
Once you have the resizing done to your liking, try saving at 90% JPEG quality. You should find that many images will save at less than 700k at 1200px/90%. Images with a *lot* of fine detail may not, and you may have to try saving at a lower quality.
02/15/2016 08:13:58 PM · #10
And you may want to be sure to duplicate your processed image before re-sizing so you retain a full-size copy of all your hard work.
02/16/2016 08:32:05 AM · #11
Originally posted by Lauren3145:

I am using lightroom, and photoshop cc 2015. I was using the image resize option in Photoshop but it just messes with the clarity so much I wasn't sure if there was another way to preserve quality. I can try the save for web option and see if that helps.


in lightroom, in export settings, set the output to 1200px longest side and 700kb max, sharpen for web.

works just fine for viewing in a web browser.
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