Problems With 25 Mb Upload Limit And Print Size Desired
I got my 36" X 48" canvas painting scanned professionally. I got the resulting jpeg image to 300dpi and 23.6mb but the image is only 15" X 20.6" now. I wanted to offer the real size to buyers. I'd have to lower the resolution of the file. What is the minimum resolution I can make the file and still get a high quality print? What is the miniumum resolution that FAA will accept a file under these circumstances? I'll appreciate any assistance you can offer.
upload it just as it is, this site doesn't do DPI. if the scan is a 1:1 so will your print. i don't know of a min. i know the largest image that's a poster (not a panorama), is 6200px. they will accept anything as long as it's clean (no noise, blocks, etc). but the smaller the image, the smaller the print size.
I've a feeling that the number you are seeing is counting the number of MB differently from the FAA hardware, by reading each colour channel separately and then adding them together, Have you tried uploading it at the scanned size (making sure it is an 8-bit jpg, not 16-bits)?
Photoshop shows my 5D MkII files as being 60.3MB but they are still smaller than the cut-off limit here, where the software reads them as being something like 20MB.
Mo T, that's true for offset printing and CMYK color separations, where you are truly dealing with physical dots. Fine art Ink-jet printing has no "dots" to contend with; it is literally a fine spray of ink.
John Johnson, upload your image as is. It will be able to print at the largest size available.
Dan are you sure your information is correct? FAA uses Epson 9880 which still uses dpi..and as far as I know 300 dpi is the standard used for commercial prints..300 dpi is the standard because it's what the human eye would see as a solid block when printing text. So if you were to print at higher dpi it would make no difference when viewing with the naked eye. Of course if you were to use a magnifying glass then you would see there are actually more or less dots. Anything lower then 300 dpi especially black ink on white background paper the human eye may detect it as broken dots and not a solid block. I think FAA prints at higher than 300dpi
"Our printers create museum quality prints at a printing resolution of 1440 x 720 dpi" which i think is a typo...(irregular dimension)
I think often people get confused with ppi and dpi which people use interchangably but are different... Epson uses the 8 colors rather than the standard 4 cmyk..but it doesn't mean they don't print in dots..If you were to magnify the image you would see dots. The key difference I think is the addition of other colors...which allows you to get wider range of colors than the regular cmyk printers..and the ability to jam pack more dots into a single inch....(Saturation of dots or colors)
FAA uses pixel dimensions for prints...and whether it looks good or not large scale would actually have to do with how well the image looks at 100% magnification on your screen.
If you up the image size in photoshop you are not really creating an image with better resolution, be aware that that process just adds data the the program interprets and may causing dithering or "noise" to your image. You want to SCAN it at a higher resolution and then you have more "real" data to work with.
I work in the graphic design field and know from experience that up"ing" the size of an image just creates extra junk pixels that are not always pretty. 300 ppit is best when scanning your image or if you scan even higher than that the image can be printed much larger. If 100 ppi is the minimal size than a 400 ppi image can be enlarged 4x.
Here are some tips for you that we give people photographing their work. However, even if you scan, some will help
First off, all artwork should be photographed following these simple steps:
1. Use at least a 10-12 MP camera, with a manual focus lens not an auto focus. The higher the MP the camera, the larger the file we have to print from. If you want to offer large prints, you need to use a high MP camera.
2. Mount the camera to a tripod. If you don't have a tripod, use a stack of books, a table, anything. You just have to have the camera sitting on something, not hand held.
3. Shoot outdoors in natural light. Make sure you white balance your camera too, or the colors won't be right.
4. Preview the image to make sure there are no blurry areas, flash problems, etc.
5. Export at the highest possible file size while staying under our less than 25 MB limit.
To preview an image in photo editing software simply use the zoom icon to zoom in on the image until it's viewed at 100% print size. What you will find is that viewing it at 100% you will be able to see if there are any problem areas.
Look all around the image at 100%, the edges included. If the image has no problems, blurry areas, uncropped edges, or areas where there is flash reflecting off the image, then you're on your way to a great image.
Second, you have to determine how large you want your image printed to. Go to the image menu, and click "Resize Image". DO NOT RESIZE THE IMAGE TO BLOW IT UP LARGER IN THIS MENU. That will only result in a blurry, pixelated, problematic image.
We need 100 pixels/inch in order to have a nice image for printing. That makes the math easy as well. Your image menu can be viewed as a pixels/inch ratio, and you can see how many inches wide by tall your image is. You can shrink down the inches in this menu if the image is blurry. THis is shrinking the image to make it a little smaller. You can shrink the image down and it will help the quality of the image, just never blow it up in this menu.
If your image is 1400 pixels by 1000 pixels then the image can be printed up to 14x10. etc.etc.
That's all you need to preview your image. Doing that will help inform you how large your image can be printed to, and whether it's print ready when zooming in at 100% to see it's quality of focus and to see if there are any problem areas.