What is dpi, and why is it important?
Dots per inch (dpi) is a measurement of print resolution that indicates how many individual dots a printer can create on a page per square inch. For crisp, colorful, professional-looking photo prints, a photo printer needs at least 600 x 600 dpi. Otherwise, your photos may turn out pixilated (that is, objects will appear speckled and blocky). HP Photosmart photo printers offer up to 4800 x 1200 dpi color prints, for amazingly sharp, lab-quality photos.
Ans. DPI stands for ‘Dots Per Inch’ and is a way to describe the resolution of your printed image. Generally speaking, the higher the resolution, the clearer and more dense is the quality of your print. You can think of it like this: Digital images (such as from your digital camera) are stored as a rectangle made up tiny dots (pixels). to make the math easy, let’s say that rectangle is 100 pixels wide and 100 pixels tall when you print a picture that is one inch wide and one inch tall. That makes the printed picture 100 DPI. Now, let’s print that same picture, but now print it to be 4 inches high and 4 inches tall. Since our make-believe camera only stored an image that is 100 pixels wide and tall, in order to print our 4 inch picture, we have to spread those pixels (dots) farther apart. Now, the 4 inch tall picture is 25 dots per inch (100 pixels divided by 4 inches). You may have noticed this ‘fading’ phenomenon if you ever tried to print a very large picture from your digital camera
