Obviously, the higher the number of pixels we can cram into that same inch of paper, the higher the quality the image is going to be on the final output, So, that’s why we have higher resolution and lower resolution or higher-qualiy and lower-quality images. The meaning of converting 72 dpi or any “less than 300 dpi” to 300dpi is that we are trying to cram more pixels into each inch. LPI is used on professional commercial printing presses. DPI is used in desktop printers and scanners. PPI is the on screen unit of measurements used by the software. When we work with imagery, we have 3 different units of measurements for image resolution: Now let’s discover how to convert 72 DPI to 300 DPI What is DPI – 3 Resolution measurements This tutorial thus will walk you through on the dpi explanation and suggested methods to convert 72dpi or any low-resolution image to 300dpi. It is because we are all aware that 300dpi is the proper resolution for sending to a standard inkjet printer. Knowing the fundamentals of resolution measurements and learning how to set 300dpi are the must-have know-how and skill. Although having said that, there are the key aspects that you should have a basic understanding on to ensure the quality of the result. Hope this helps you to understand what goes on when you change these settings.Image sizing is relatively simple and straightforward. You could, just as easily changed the image size at the same time to (say) 5×5 inches, in which case the pixel size would have been 360×360.
So now you have interpolated (messed with the pixels) to reduce the size of the file. and the pixel size is now 720×720 pixels. See, the image is still 10×10 inches – but at screen resolution. Now CHECK the "Resample Image" box and change the resolution to 72 ppi.
Hold Alt and click the RESET button to put things back as they were. – you have not changed the file in any way! The pixel dimensions, however, are still 3000×3000. You will note that the size has changed to 41.667 x 41.667 inches. Now UNcheck "Resample Image" and change the resolution to 72 ppi. Go Image>Size and you will see that the size is given as 10" x 10". Take an image which is (say) 3000 x 3000 pixels and the resolution is 300 ppi (PIXELS per square inch).
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