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Aloha Art

9 Years Ago

File Size To Large To Upload - What Do You Do To Shrink The Size Without Destroying The Quality?

I have a file I am trying to upload and it is around 29Megs and it is a single shot image (not stitched together). I have not had this problem before and to be honest I am not sure the best way to decrease the file size without losing anything significant on the image quality.

The one thing I will not do is literally shrink the image as far as reducing the width or height.

What have you done in this situation in the past and I guess what are the biggest dos and donts of solving this problem here.

Also, why would they put a limit on this? I understand not wanting the size to be unlimited, but 25 seems pretty small for large high rez prints, but why not make it up to 40 or 50 megs?

Thanks in advance for the feedback.

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Chris Bordeleau

9 Years Ago

I run into file size limits on my pano's all the time... my only option is to go through trail and error of reducing the resolution until I get it under 30mb...the largest ones I have are around 100 images stitched which result in a 16k x 16k file. I have found that getting them to around 6-8k usually works... good luck

 

Pamela Patch

9 Years Ago


I am with Chris. On the few occasions that I have needed to get under 25 mb I reduced the resolution of my image.

 

Murray Bloom

9 Years Ago

Since FAA requires JPGs, you can reduce the quality to 10 in Photoshop without any appreciable degradation. This will retain the original pixel dimensions.

 

Gregory Scott

9 Years Ago

You want, if possible, to retain the full original pixel dimensions. Always Avoid resizing if possible. This destoys the most resolution. It is better to compress than to downsize. At practical viewing distance, you won't generally be able to see the artifacts caused by compression in a 50 mb file that ends up 25mb file that was shrunk by increasing compression so that it fits in under 25mb. Sure, if you look at the print under a loupe you can spot some blocky pixels, but if you don't over compress, you won't see the usual JPG halo type artifacts we normally see at high compression. I've tested this on screen with a file that had to be compressed to quality 8 of 12. It still looked quite good, even at 100%. If you have detail that absolutely requires a larger file size, you need a custom printer to do the work for you anyway. Perhaps a Murals or Outdoor Advertising vendor. And you KNOW they just crank up the pixel size, and effectively increase the viewing distance more or less proportionally, in many cases. Photoshop and Lightroom have options that allow you to export images to force a JPG extraction to a specific targeted maximum file size.

 

Thomas Zimmerman

9 Years Ago

Save it at .jpg quality 11. You won't tell the difference in a print one bit.

 

Joy McKenzie

9 Years Ago

Increasing the allowable size for uoloads would increase the price FAA pays for storage of our hi-resolution images. I'm assuming keeping the allowable size at 25mgs also helps keep our membership fee low.

 

Jessica Jenney

9 Years Ago

I agree with Murray, change in Photoshop to 10 or 11

 

Abbie Shores

9 Years Ago

Hi,

Yes allow a maximum of 25mb uploads per image and If the file is larger than that you will, unfortunately have to shrink of slightly compress the images

We print at 100dpi up so that makes your math easy. 1000 pixels at 100ppi would be 10"

You may compress safely down to 10-11 before losing any quality on the print

Abbie

 

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