**Calculation**

In this approach, two cameras with a known physical relationship (i.e. a common field of view the cameras can see, and how far apart their focal points sit in physical space) are correlated via software. By finding mappings of common pixel values, and calculating how far apart these common areas reside in pixel space, a rough depth map can be created. This is very similar to how the human brain uses stereoscopic information from the eyes to gain depth cue information, i.e. how far apart any given object in the scene is from the viewer.

The camera attributes must be known, focal length and distance apart etc., and a calibration done. Once this is completed the systems can be used to sense the distances of objects by triangulation. Finding the same singular physical point in the two left and right images is known as the *correspondence problem*. Correctly locating the point gives the computer the capability to calculate the distance that the robot or camera is from the object. On the BH2 Lunar Rover the cameras use five steps: a bayer array filter, photometric consistency dense matching algorithm, a Laplace of Gaussian (LoG) edge detection algorithm, a stereo matching algorithm and finally uniqueness constraint.

Read more about this topic: Stereo Cameras

### Other articles related to "calculation":

**Calculation**- Comparison To Computation

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**calculation**involves numbers and the word usually connotes a simple process, but computation may be done by applying specific rules, with or without numbers, and the ...

**Calculation**is a prerequisite for computation ... The difference in the meaning of

**calculation**and computation appears to originate from the late medieval period ...

...

**Calculation**of square roots of irrational numbers was not an easy task in the third century with counting rods ... this result because he had acquired the same result with the

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**calculation**of square roots was not a simple task with rod calculus ...

**Calculation**- Remarks

2 ... In a multiplicative time-series model, the seasonal component is expressed in terms of ratio and percentage as Seasonal effect = (T*S*C*I)/( T*C*I)*100 = Y/(T*C*I )*100 However in practice the detrending of time-series is done to arrive at S*C*I ...

### Famous quotes containing the word calculation:

“Common sense is the measure of the possible; it is composed of experience and prevision; it is *calculation* appled to life.”

—Henri-Frédéric Amiel (1821–1881)

““To my thinking” boomed the Professor, begging the question as usual, “the greatest triumph of the human mind was the *calculation* of Neptune from the observed vagaries of the orbit of Uranus.”

“And yours,” said the P.B.”

—Samuel Beckett (1906–1989)