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Thread started 26 May 2010 (Wednesday) 19:01
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Image Aspect Ratio Questions and Help!

 
ChrisMc73
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May 26, 2010 19:01 |  #1

I'm working on putting some of my images up on a web site that is using Pimp My Vanilla.
I can change the aspect ratio of where these images are displayed; the default size is 1600x900, but I was wanting to lower that to 900x600.

It seems when I do this the images are not as crisp and clear as they are at the default 1600x900 ratio.

When I crop the original image in Aperture 3, I use the aspect ratio of 900x600 and crop it. Then I export it as an JPEG at 12 quality and to fit in the 900x600 pixel size. They look good on my computer at this size, but when I put them up on the website into the 900x600 template aspect ratio, they all are losing sharpness and quality.

I'm not sure if this is due to the flash template or my export?




  
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hqqns
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May 26, 2010 19:06 |  #2

My guess is the site you're uploading to is converting the JPEG to a smaller size automatically compressing your JPEG more and therefore f#$%ing up your images :(


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ssim
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May 26, 2010 20:30 as a reply to  @ hqqns's post |  #3

I am assuming that we are talking about an image taken with your 5D MKII. I am not an Aperture using so I am not clear on how it handles cropping. If you are cropping to 1600x900 out of a 5DMKII image you are losing some of the image either on the top or the bottom. I am not sure how you are turning this into 900x600 as the two are not the same aspect ratio. If you are transforming the image you definitely will get some weird things happening.

You are starting with an image that is 5616x3744, turning that into a 1600x900 and then 900x600. It sounds like you are forcing 1600x900 into a 900x600 but I don't know how you are doing this. If you have an image with its longest side at 1600 and reduce this to 900 the shortest side would 506 give or take a pixel or two. Is the final image really 900x600, and I mean only image size, not borders, watermark strips or anything else that is added to the image. The aspect ratio of the 5D image does match that of an image reduced to 900x600.

Unless my math is all screwy you are trying to put a square peg in a round hole.


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ChrisMc73
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May 26, 2010 21:21 |  #4

hqqns wrote in post #10252019 (external link)
My guess is the site you're uploading to is converting the JPEG to a smaller size automatically compressing your JPEG more and therefore f#$%ing up your images :(

No, the site/flash template is specific, whatever I set the aspect ratio at, thats the size that will fit in there edgeless if I export/crop at that same size. Its not converting anything, it only does that if its not the same size as the aspect ratio I set the template to, then it just displays the image as a letterbox.

I think I might have figured out my issue, more to come.




  
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ChrisMc73
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May 26, 2010 21:24 |  #5

ssim wrote in post #10252416 (external link)
I am assuming that we are talking about an image taken with your 5D MKII. I am not an Aperture using so I am not clear on how it handles cropping. If you are cropping to 1600x900 out of a 5DMKII image you are losing some of the image either on the top or the bottom. I am not sure how you are turning this into 900x600 as the two are not the same aspect ratio. If you are transforming the image you definitely will get some weird things happening.

You are starting with an image that is 5616x3744, turning that into a 1600x900 and then 900x600. It sounds like you are forcing 1600x900 into a 900x600 but I don't know how you are doing this. If you have an image with its longest side at 1600 and reduce this to 900 the shortest side would 506 give or take a pixel or two. Is the final image really 900x600, and I mean only image size, not borders, watermark strips or anything else that is added to the image. The aspect ratio of the 5D image does match that of an image reduced to 900x600.

Unless my math is all screwy you are trying to put a square peg in a round hole.


I'm actually not doing that either, I just didn't make it clear what I was doing and have confused you. I set my flash template to whatever aspect ratio I want, and basically give it a window to be displayed in; so I've tried it in two different ratios, 1600x900 and 900x600, in which cases I've also export/cropped the images for each of those sizes and used them in the respective same sized setting on the template.

I think what is happening is my 900x600 setting and image size, is being stretched out over my 30" Apple Display, causing them to look bad when that big. If I shrink the browser window down, the image looks better. I need to test it out on a smaller monitor as well, just to see. I think thats all I'm doing wrong.




  
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ChrisMc73
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May 27, 2010 07:55 |  #6

hqqns wrote in post #10252019 (external link)
My guess is the site you're uploading to is converting the JPEG to a smaller size automatically compressing your JPEG more and therefore f#$%ing up your images :(

I was wrong, there is some resampling going on...

http://intothedarkroom​.com …es/Server_side_​resampling (external link)

I will play some more with this and see what comes about.




  
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Image Aspect Ratio Questions and Help!
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