Newspapers and billboard posters are likely to use even lower settings. Art books may use halftone screens up to 300lpi, whereas magazines are more likely to use 150 lines per inch.
"The finer the screen, the more detailed the reproduced image. Quoting from this link (I looked at a few to find a good one):
#Image dpi converter software full#
Things can become even more confusing here! Print production, such as in a magazine, is achieved for photographs using halftone screens that are described in terms of lines per inch - the number of lines of holes in a conventional halftone screen that is (was) used to convert continuous tone photographs into those little dots that appear to be continuous tones but are in fact dots of varying size.ĭots per inch and lines per inch do not coincide, because the dots of a line screen vary in size so it takes many dots (pixels) per inch of a digital file to make one full (round) dot in a line screen. Leave "Resize to Fit" unchecked and simply change the "Resolution" field. It's under the Image Sizing section of the Export dialog. In Lightroom you select the Resolution value when you "Export" an image. Best thing to do is to simply change the DPI value to what they want and submit your photo. When a publisher asks for images of a certain resolution, it usually means they have no idea what they're talking about. So an image with a resolution of 1600x2000 will print at 200 PPI on 8x10 paper, and 100 PPI on 16x20 paper. The X and Y dimensions of the image are divided by the number of inches of the paper, and that’s the resulting PPI of the print. When it comes to printing photographs, the DPI value doesn’t come into play for one primary reason.we nearly always print borderless. The DPI value has no meaning for images from a camera.
#Image dpi converter software software#
The DPI value that software displays is either set by the camera to an arbitrary number, or is simply the default of the software. However, images from cameras are not scanned. Obviously, this is an important value for document imaging software and associated databases. So if you scan at 300 DPI and print the image at 300 PPI, you will recreate the original document. This allows the image of the document to be printed in its original size. When you scan a document using a typical scanner, the DPI used during the scan will be assigned to the DPI value of the image. The correct name for this value is DPI, and it refers to the DPI value used to scan the image. Photoshop calls it Resolution, other software calls it DPI, and still others call it PPI. This is important to remember.ĭPI/PPI/Resolution in Software - All imaging software will display a number related to the image. Here, one scanner dot will become one pixel in the resulting image. uses Theta 76 printers.ĭPI also refers to scanner resolution. I have prints from a Theta 76 and they’re really good. The Durst Theta 76 specs claim detail as good as a 1200 DPI inkjet. For these printers, a low DPI value doesn’t indicate a lesser ability to print detailed images. In this case, one printer dot relates directly to one image pixel.
These printers have lower resolutions, such as 254 DPI for a Durst Theta 76. When printing images from these printers, the native PPI values are the only numbers that are meaningful.ĭPI is also used by commercial printers such as Durst or Noritsu wet printers. For Canon it’s 600 PPI and for Epson it’s 720PPI. Such printers have a resolution that photos are printed at, which is sometimes called the Native resolution or Photo resolution, given in PPI. That’s why printer specifications give resolution as two values, such as 4800 x 2400 DPI for Canon printers. Most printers require a matrix of dots to recreate one image pixel. Confusion arises when trying to relate printer dots to image pixels. For printers, it is usually the number of physical dots that can be printed on an inch of paper. It only has an X number of pixels and a Y number of pixels.ĭPI - Dots Per Inch. Also, when an image is printed on paper, PPI can refer to the number of image pixels that were printed for every inch of paper. For example, my 30” HP monitor has a resolution of about 101.6 PPI. This term usually refers to a monitor’s display resolution. We’ll talk about an image’s “Resolution” value last. We need to clarify some terms, because they all have multiple meanings.
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