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With the sensor size, image pixel resolution, focal length, and known subject size, you can back-calculate (well, estimate) the distance between the camera and subject (assuming that the subject is reasonably parallel to the camera sensor plane).
In addition, call the distance between the camera and the two points $L$. The camera's field of view ($FOV$) (or angle of view as is more common in photography) can be calculated by $$ FOV = 2\arctan\left(\frac{d}{2F}\right) $$
8 cze 2017 · I'm trying to calculate the size of an object in pixels in an image, when I have these information: x * y = the size of the real object in meters. q = the quality of the image in dpi. d = the distance between object and the camera in meters. Do I have to know the size of image as well?
You can measure the distance between 2 or more points on the map. For example, you can measure the mileage in a straight line between 2 cities. On your iPhone or iPad, open the Google Maps...
29 mar 2023 · In this article, I explain how you can measure the distance between 2 or more locations on an Apple Map. You can figure out the straight line distance and the travel distance. For example, you can figure out the mileage between two cities or more that you place on a map.
4 gru 2020 · The iPhone 11 racks up a solid score for autofocus, thanks to the main camera’s PDAF system consistently delivering in-focus shots during our benchmark lab analysis and while shooting test scenes on location.
Use the Measure app and your iPhone camera to measure nearby objects. iPhone automatically detects the dimensions of rectangular objects, or you can manually set the start and end points of a measurement. For best results, use Measure on well-defined objects located 0.5 to 3 meters (2 to 10 feet) from iPhone. (Measurements are approximate.)
