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We are talking about the actual size (height) of an object vs. the height of its formed image. This ratio intertwines object distance (symbol u) with image distance (symbol v) and focal length (symbol F).
- Subject-distance
The camera im using is a small camera that will be taking...
- Calculations
Q&A for professional, enthusiast and amateur photographers
- Subject-distance
There is an object whose height is $30$cm. At some distance it looks like it is $0.5$cm high. Can I calculate the distance based on this information? Thanks in advance.
You can calculate the length of a path, running route, fence, border, or the perimeter of any object that appears on a google map. The distance calculator will then display a measurerment of the length in feet, meters, miles and kilometers.
Our ramp slope calculator can help. 😉. Use it to work out the size of the required ramp, and both the angle and run of the ramp. In this article, we will detail how to use the calculator and how it works.
You can calculate the length of a path, running route, fence, border, or the perimeter of any object that appears on a google map. The distance calculator will then display a measurement of the length in feet, meters, miles and kilometers.
26 gru 2012 · The formula: distance = size_obj * focal_length / size_obj_on_sensor. The whole method depends on figuring out the size of the object as it appears on the sensor given the focal length and the measured object size.
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 ...
