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Photo resolutioner12/7/2023 ![]() ![]() But then smartphones could outrank some semi-pro DSLRs. You might think more pixels mean better images. But the camera sensor, processor, and even the quality of the lens you are using also play a part. Photo resolution is a factor that determines image quality. This refers to the photograph or image’s detail when viewed at 100% on a computer monitor.īut image resolution also relates to the image’s print size. It means how many pixels are displayed per inch in the image. Image resolution is often given in PPI (pixels per inch). For example, an image that’s 2,048 pixels wide and 1,152 pixels tall has a resolution of 2.36 MP (megapixels). To calculate the image’s resolution, multiply its width and height. Image resolution is measured in pixels and megapixels. The more pixels, the more detailed the image is and the higher its resolution. The number of pixels on an image determines the image resolution. (1,048,576, to be precise.) So a 30 MP camera has around 30 million pixels on its sensor. A megapixel (MP) is one million of these pixels. This means they are the smallest parts of a sensor (or a camera display).ĭigital images are made from thousands of tiny tiles capturing light and color. Pixels are the smallest components of a digital camera sensor. And if we change the resolution while Resample is turned on, the pixel dimensions will change along with it.What is the Photo Resolution for Printing of a Megapixel?Ī digital camera captures images through what we know as pixels. Resampling means that we're changing the number of pixels. And we do that by making sure that the Resample option directly below the Resolution value is turned off (unchecked). The Resample optionįirst, we need to make sure that we're changing only the resolution and not the number of pixels. ![]() And we can prove it very easily in Photoshop's Image Size dialog box. Changing the print resolution does not change the number of pixels, and therefore has no effect on the file size. That is, the number of pixels in the width and the number of pixels in the height. The reason is that, as we learned in the previous lesson, the file size of an image depends entirely on its pixel dimensions. But lowering the resolution does not make the file size smaller. And yes, smaller file sizes do download faster. The idea is that by lowering the resolution, you lower the file size, allowing the image to download faster. Many people believe that, before you email an image or upload it to the web, you need to lower its resolution, usually to something like 72 pixels/inch. So now that we know that image resolution controls the print size of an image, let's look at why the resolution value has no effect on your photo's file size. Why image resolution does not affect file size The print size based on the current resolution. It controls the size that your image will print, and nothing else: And that's all that image resolution does. And here we see that sure enough, at a resolution of 300 pixels/inch, my image will print 20.053 inches wide and 13.387 inches tall. To view the current print size of your image, change the measurement type for the Width and Height from Pixels to Inches. Viewing the current print sizeĭirectly above the Resolution value in the Image Size dialog box are the Width and Height options. A height of 4016 pixels divided by 300 pixels/inch means that the height of my image, when printed, will be roughly 13.387 inches. And we can do the same thing with the height. So with my image, a width of 6016 pixels, divided by the resolution value of 300 pixels/inch, means that my image will print at a width of roughly 20.053 inches. To figure out the actual print size, we just divide the width and height of the image, in pixels, by the resolution value. It also means that 300 pixels from the height of the image will be packed into every inch of paper from top to bottom. How image resolution affects print sizeįor example, a resolution of 300 pixels per inch means that 300 pixels from the width of the image will be packed into every inch of paper from left to right. And lower resolution values pack fewer pixels per inch, giving us a larger print size. Higher resolution values pack more pixels into a linear inch, resulting in a smaller print size. The Resolution value in Photoshop's Image Size dialog box sets the number of pixels from your image that will print per linear inch of paper. Image resolution does one thing and one thing only it controls the size that your image will print. So let's start by learning what image resolution really means. So what exactly is image resolution, and what does this option in the Image Size dialog box actually do? There's a lot of confusion out there regarding the resolution value, especially when it comes to uploading images to the web. ![]()
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