If the lens is delivering less data than the sensor is capable of capturing then the pixels capture the data with fewer artefacts, but they do not add any data. So the number of pixels does not determine the amount of detail in the photo. This is nonsense, but that has not prevented it from being repeated al over the internet, and in many cases i is obviously by people that are uncritically repeating what they have heard, with little or no hands-on experience. and, therefore, as an ideal to be aimed for. It is the pixel density (PPI not DPI) that sets an upper limit to the amount of genuine detail in the printed image.Īs for what the PPI should be, the figure of 300 is bandied about on the net as the maximum resolution that most people can distinguish from close up. With typical inputs ranging from lower than 100 PPI to a high of 600 PPI modern inkjet printers typically print several dots for each pixel. Dots per inch (DPI) are what the printer puts on the paper. Pixels per inch (PPI) are what is input to the printer. So, although it is correct in many ways, it ends up adding to the the confusion and misunderstanding it was intended to clear up. This article keeps referring to DPI where in many cases it means PPI. You get that single yellow pixel 25 times. You don’t get that data back when you enlarge it. Merging that bee’s 25 pixels down to a single yellow one deletes all the black and yellow stripe data. You can always shrink the larger photo down to a smaller size, but you can’t go the other way without a loss of detail. With that increase, now maybe you can see black and yellow stripes. If your camera takes that same photo at 4000×5000 pixels, that single pixel representing the bee expands to 25 pixels. You’re not going to get any additional detail out of a single pixel just because you changed DPI. That bee is still a single yellow pixel regardless of whether it’s printed at 100 DPI or 33 DPI or 1 billion DPI. You can print that same photo as a 24″×30″ poster at 33 DPI. If you print your photo as an 8″×10″, that’s 100 DPI (800 pixels ÷ 8 inches = 100 dots per inch). Maybe there’s a bee on the flower, and it’s represented by just a single yellow box. At this zoom level, you realize that flower in the distance is nothing more than a couple of red boxes next to each other. That means if you zoomed in, you would see 800 columns and 1000 rows, and each box would have one color in it. Let’s say you have a beautiful photo of a grassy field.
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