![]() For example, 3:2 indicates a horizontal image captured in landscape orientation, whereas 2:3 refers to a vertical image captured in portrait orientation. Lastly, when aspect ratio is expressed in two numbers separated by a colon, the first number typically refers to the horizontal side of the image, whereas the second number refers to the vertical side. ![]() When looking at image dimensions in pixels, a 6000×4000 image from a 24 MP camera also has the same 3:2 aspect ratio. For example, the aspect ratio of 3:2 could translate to an image that is 3 meters wide and 2 meters high, as well as 3 feet wide and 2 feet high. It is important to note that aspect ratio does not represent the physical size of an image, or its dimensions in pixels – it refers only to the relationship of its width to its height. Nikon’s CMOS sensors have a 3:2 aspect ratioĪs discussed further down below, some cameras allow choosing different aspect ratios through the camera menu, providing cropping options other than the native one of the image sensor. All modern full-frame and APS-C DSLR cameras have 3:2 aspect ratio sensors, whereas 4:3 is a popular choice among smartphone, Micro Four Thirds and some medium format camera manufacturers. The most common aspect ratios of modern digital camera sensors are 3:2 and 4:3. The aspect ratio is often determined by the form factor of the camera’s film / imaging sensor, which is practically always rectangular. Similarly, an image with a 3:2 aspect ratio would be represented by 3 equal size units for its width vs 2 units for its height, as shown below: For example, a 4:3 aspect ratio would consist of 4 equal size units for its width and 3 equal size units for its height. You can easily visualize any aspect ratio by allocating units to the width and the height of an image. Some even prefer to express aspect ratio as a decimal, followed by a colon and number 1, such as 1.50:1. It can be expressed as a number followed by a colon and followed by another number, such as 3:2, or by a decimal number such as 1.50 (which is simply the long side divided by the short side). Dot pitch is calculated from the diagonal length in inches and pixels then converted from inches per pixel to millimeters per pixel but normally only expressed in millimeters (mm).In photography, aspect ratio represents the relationship between the width and the height of an image. How to Calculate the diagonal dot pitchĭiagonal dot pitch is the diagonal distance from the center of one pixel to the center of the next. So there are 48528 pixels in an area of the screen that is 1 inch wide by one inch high. Using this same computer screen, PPI 2 will be: Example: Calculate Pixels per Square Inch, PPI 2 ![]() So there are 220.29 pixels in a 1 inch line on the display. You want to find the pixel density in one linear inch of display.Ĭalculate the diagonal length in pixels with the Pythagorean Theorem: You have a computer screen that is 1920 pixels wide by 1080 pixels high. ![]() Substitute 1 cm for 1 inch to find pixels per square centimeter or PPcm 2. The number of pixels in a square inch represents the resolution or pixel density of an area of one square inch. Multiply PPI × PPI to get pixels per square inch. How to Calculate PPI 2 or Pixels per Square Inch ![]() Just substitute cm for inches to find PPcm. You can use the same PPI formula above to calculate pixels per centimeter, PPcm. If a display does not have square pixels then this calculator does not apply. The PPI will be the same whether it's a horizontal or vertical or diagonal inch because pixels are square and therefore symmetric. The number of pixels per inch or PPI tells you how many pixels are in a 1 inch line on a display screen. ![]()
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