# CalBackProject implement

Hi everyone, I want to make my own function calbackProject in c++. Can you help to give some instructions to do? Thank you!

CalBackProject implement

Asked: **
2016-11-08 17:07:26 -0500
**

Seen: **87 times**

Last updated: **Nov 08 '16**

How can I get Back Projection matrix including numbers over 255 or decimal by calcBackProject?

calcBackProjectPatch not supported?

What mathematically is back projection?

Unexpected result with RGB Histogram Backprojection in Python

What is solvePnP() exactly for? (while i already have the projection matrices P)

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can you try to give some more explanation ?

Here is the description, but I am not clear enough to do. The functions calcBackProject calculate the back project of the histogram. That is, similarly to calcHist , at each location (x, y) the function collects the values from the selected channels in the input images and finds the corresponding histogram bin. But instead of incrementing it, the function reads the bin value, scales it by scale , and stores in backProject(x,y) . In terms of statistics, the function computes a probability of each element value in respect with the empirical probability distribution represented by the histogram.