1. 300 DPI in Lightroom, high quality setting in the Canon firmwarre. 2. 300 DPI in Lightroom, highest quality setting in the Canon firmware. 3. 600 in Lightroom, highest quality setting in the Canon firmware #2 was the sharpest. On close examination, it was noticeably sharper than #3. One is the 720/600 ppi vs. 360/300 ppi resolution (depending on printer brand), the other is the accuracy of resizing. As I get it, Qimage interacts with the driver and resizes to the exact number of pixels required by the driver for the planned print size (internally translated to a specific dot-matrix size). 300 dpi • 600 dpi • HQ 1200 • Toner Save Mode is not available for 1200 dpi or HQ 1200 resolution. • Reverse Print (Mac OS X 10.3.9 to 10.4.x) PPI to DPI Conversion. The abbreviation for PPI and DPI is pixel per inch and dot per inch respectively. 1 PPI is 1 times smaller than a DPI. To measure, units of measurement are needed and converting such units is an important task as well. unitsconverters.com is an online conversion tool to convert all types of measurement units including PPI to DPI conversion. What Resolution To Use for Print on DemandIn this video I explain the difference between DPI and PPI and what resolution is needed when you save a PNG for pr a. Try expanding the 300 dpi image to 600 dpi using appropriate intermpolaton (usually bi-cubic) b. Now, subtract one image from the other. You want to get the absolute value of the differences. c. The resulting image will be VERY low contrast. Normalize the contrast. d. Look at the image. Here's a comparison of 300 ppi (Voyage, Oasis, 2015 Paperwhite) vs 221 ppi (2014 and earlier Paperwhite) vs 167 ppi (Classic Kindle). Actual dimensions seem to be. 1072 x 1448 (300 ppi) 758 x 1024 (221 ppi) 600 x 800 (167 ppi) The 300 ppi can legitimately claim to be nearly indistiguishable from paper to my eye, once you factor in the natural Resolution greater than the CCD optical rating is simply interpolated resolution, done in software after the 600 or 1200 dpi optical scan. Interpolated resolution is the least important scanner specification. It was useful for line art mode, and only for line art, to reduce jaggies when we had 300 dpi scanners and needed 600 dpi line art. For example, sending a 203 DPI format to a 300 DPI printer will result in an image that is approximately 33% smaller. Solution. Verify the printhead resolution is the same on both printers by comparing a printer setup label (Configuration Label). Note the line that states the Resolution value. These should be the same on both printers. I want to export a ggplot as JPEG with 300dpi for print but whatever I do I get a file with 72dpi (on macOS 10.15.6, RStudio 1.3.1073, R version 4.0.2).. I tried both methods as explained here: Saving a high resolution image in R but neither are working. Z87PYvV.