If an image is low quality, adding resolution by resampling is most likely not going to make a difference. It is always best to leave your image alone and print it the way it came off your device. This typically does not increase resolution and/or quality and can sometimes produce an inferior file for printing. Resampling simply uses computer algorithms to generate pixels to artificially produce more resolution. Most of the image files that make their way into our lab have been resampled. It is best practice to send out a Jpeg for printing and to keep the TIF file saved locally for future edits or enhancements. A Jpeg is a snapshot of your current edit with essentially all of the previous information saved for future use. When you submit a TIF file, you are sending all of the data within the image, including layers and channels that may be hidden. Uploading or submitting your file as a TIF will take much longer than using a compressed format such as Jpeg. ![]() Most photographers like submitting files in the TIF format. TIF or Jpeg? Which file format should I use? Even the most expensive camera setups that cost over $60,000 will not be able to print their images at 48 x 72 at 180 PPI. ![]() The quality loss seen at 72 PPI will not be noticeable from a viewing distance of 3 feet away.ħ2 PPI is a totally acceptable resolution range for prints larger than 24" x 36". You can see there is no noticeable difference between 300 PPI and 180 PPI but when you get to 72 PPI the quality loss is apparent up close. The image above shows an isolated section of each print at different resolutions. Prints size 20" x 30" should be viewed at a distance of no less than 3 feet while larger prints should be viewed at minimum 4 feet. The above image demonstrates ideal viewing distance for medium to larger prints. Many of our professional artists and photographers print their extra-large prints at around 50-80 PPI and their prints look very sharp under normal viewing distances of 4-6'. For extra-large prints such as 40" x 60" and 48" x 72" you can get away with 60 PPI and sometimes even less due to the increased viewing distance. 100 PPI is perfect for prints larger than 16" x 24" up to 32" x 48" as no noticeable quality loss will be noticeable from a short viewing distance of 3 feet away. Prints that are larger than 16" x 24" are going to be viewed at a greater distance and therefore do not require as much resolution. 150 PPI and up is perfect for smaller prints that are going to be viewed up close with a very short viewing distance. While 180 PPI is the ideal optimum resolution, you will not always be able to hit that amount of resolution and that's ok. It is best to keep a file saved with the maximum resolution so that it can be printed at larger sizes in the future. They also will not hurt your image except for causing the file to be larger. If you have more than the maximum needed resolution of 180 PPI, those extra pixels will not serve any benefit. When you have too much sand, it will pile on itself and reach its density limit. The tighter you combine the sand pieces, the denser it will be. If you have 3000 pieces of sand, the more you spread them out, the more gaps you will have overall. An image file with lots of resolution (pixels) is ideal because it keeps your options open to printing it much larger. Obviously, the more resolution your image has the better, but you will not get any noticeable benefit to having your image at 300+ PPI as opposed to 180 PPI. We have found that when printing the same image in 300 PPI and 180 PPI, there is no noticeable quality loss, even in the super fine details when viewing up close. 300 PPI is the optimum resolution for some printing methods such as a printing press or laser prints but not for the dye sublimation process or any process that uses an inkjet printer. ![]() Many people think 300 PPI (pixels per inch) is the standard for any kind of print and that is simply not true. How many pixels does my image need for metal prints? DPI and PPI are both acceptable terms when referring to the quality of one's image. There can be many pixels within a dot or many dots within a pixel depending on the printer. On the printer level, it deals with dots. Technically, PPI is the correct acronym for resolution in a photo since its specifically referring to the number of pixels. When photographers typically talk about resolution, the usual terminology is DPI which stands for "dots per inch" or PPI which means "pixels per inch". it sounds pretty simple, but it's just a bit more complicated than that and we are going to explain how much resolution you need depending on your print size and other factors. The more pixels, the more resolution it has. In the printing world, the resolution is measured by the number of pixels a photo file contains. We often get asked how much resolution (or pixels) is required for printing on metal.
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