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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 16 Mar 2011 (Wednesday) 01:18
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Resizing HELP!!!

 
jgarner447
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Mar 16, 2011 01:18 |  #1

Hi guys me again , im just wondering is there anyway i can make my images small enough so i can upload them to facebook but still keep image sharpness, im decreasing image size in photoshop but the saved file looks a bit pixely and when i upload it to facebook its worse, surely there must be a way to keep the sharpness? please help
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Damo77
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Mar 16, 2011 02:01 |  #2

Let's cut Facebook some slack! (external link)


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renlok
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Mar 16, 2011 02:39 |  #3

basically from reading that page, make your images less then 720x720.

and apply a sharpen to it before exporting or saving for web


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Rimmer
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Mar 16, 2011 10:12 |  #4

Well, I ran a couple of tests to see what this was all about. I have a FB account but have never found a use for it, so I was curious about the photo sharing capabilities.

First I selected a 3648x2736 RAW file and directed Lightroom to upload it to FB with the following settings: JPEG, 80% quality, no resizing, sharpen for screen. After the upload I went to FB to view the resulting image. It looked OK in the FB viewer, so I selected Download. What came down was a 2048x1536 pixel image of 767 kB,

Next I selected the same RAW file and directed Lightroom to upload to FB with these settings: JPEG, 80% quality, resize to 2000 pixels maximum, sharpen for screen. Repeating the view and download process, what came back was a 2000x1500 pixel image of 810 kB.

As a final test I had Lightroom export the same image to my hard drive with the same settings (2000x1500 size). The result was a 1.24 MB file.

All three downloaded images look essentially the same on screen.

Not sure what all this means but at first inspection it would appear that:

1. Maximum image size on FB is 2048 pixels.

2. FB does apply some additional compression to images.

3. The 720 pixel limit is contraindicated.

(In case somebody does the math and wonders what is going on, the images are 4:3 aspect ratio because they are from a G11.)


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tonylong
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Mar 16, 2011 11:40 |  #5

Has anybody had Facebook actually give a view of larger than 720 pixels?


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lsquare
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Mar 19, 2011 16:31 |  #6

Rimmer wrote in post #12030898 (external link)
Well, I ran a couple of tests to see what this was all about. I have a FB account but have never found a use for it, so I was curious about the photo sharing capabilities.

First I selected a 3648x2736 RAW file and directed Lightroom to upload it to FB with the following settings: JPEG, 80% quality, no resizing, sharpen for screen. After the upload I went to FB to view the resulting image. It looked OK in the FB viewer, so I selected Download. What came down was a 2048x1536 pixel image of 767 kB,

Next I selected the same RAW file and directed Lightroom to upload to FB with these settings: JPEG, 80% quality, resize to 2000 pixels maximum, sharpen for screen. Repeating the view and download process, what came back was a 2000x1500 pixel image of 810 kB.

As a final test I had Lightroom export the same image to my hard drive with the same settings (2000x1500 size). The result was a 1.24 MB file.

All three downloaded images look essentially the same on screen.

Not sure what all this means but at first inspection it would appear that:

1. Maximum image size on FB is 2048 pixels.

2. FB does apply some additional compression to images.

3. The 720 pixel limit is contraindicated.

(In case somebody does the math and wonders what is going on, the images are 4:3 aspect ratio because they are from a G11.)

Are you saying that even pictures with a long edge of 720 pixels will get recompressed as well?




  
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lsquare
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Mar 19, 2011 16:32 |  #7

tonylong wrote in post #12031475 (external link)
Has anybody had Facebook actually give a view of larger than 720 pixels?

You mean in the FB picture viewer?




  
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Steve ­ Ruddy
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Mar 19, 2011 16:44 as a reply to  @ lsquare's post |  #8

I think it's safe to say FB will add compression to any size photo that is uploaded. However If you upload a size other than 720px (longest side) in addition to getting compressed it's also getting resized either up or down. Resizing will degrade the image even further.


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Rimmer
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Mar 19, 2011 21:13 |  #9

lsquare wrote in post #12051513 (external link)
Are you saying that even pictures with a long edge of 720 pixels will get recompressed as well?

Sorry, I haven't done that experiment. You might give it a try.


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Resizing HELP!!!
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