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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).
26 gru 2012 · c_x = 1637. c_y = 1271. Checking the details of the series of chessboard photos you took, you will find the native resolution (3264x2448) of the photos and in their JPEG EXIF headers, visible in iPhoto, you can find the Focal Length value (4.15mm). These items should vary depending on camera.
16 lip 2016 · To work out the size of the object on the sensor, work out it's height in pixels, divide by the image height in pixels and multiply by the physical height of the sensor. So the whole sum is: $$ \textrm{Distance to object}(mm) = \frac{f(mm)\,\times\, \textrm{real height}(mm)\,\times\, \textrm{image height}(pixels)} {\textrm{object height}(pixels ...
In addition, call the distance between the camera and the two points $L$. The camera's field of view ($FOV$) (or angle of view as is more common in photography) can be calculated by $$ FOV = 2\arctan\left(\frac{d}{2F}\right) $$
Measure dimensions with iPhone. 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.
22 wrz 2021 · Like last year's iPhone 12 Pro Max, the iPhone 13 and 13 Mini models capture ~47% more light than the iPhone 12 and 12 Pro models, thanks to the 47% larger sensor surface area resulting from the 1.7µm pixels (up from 1.4µm).
27 gru 2022 · Ritik Singh. December 30, 2022. 7 min read. Your iPhone can use its camera and LiDAR sensor to measure dimensions such as height, distance, and length of nearby objects. And it can potentially replace a measuring tape for household purposes. In this article, let’s see how you can measure height and distance using your iPhone or iPad camera.
