Defines image exposure value computation objects:
Computes the exposure value from given image FNumber, Exposure Time and ISO values.
Parameters: |
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Returns: | Image exposure value. |
Return type: | ndarray |
Examples
>>> exposure_value(8, 1, 100)
6.0
Adjusts given array exposure using given \(EV\) exposure value.
Parameters: |
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Returns: | Exposure adjusted array. |
Return type: | ndarray |
Examples
>>> adjust_exposure(np.array([0.25, 0.5, 0.75, 1]), 1)
array([ 0.5, 1. , 1.5, 2. ])
Computes the average luminance from given image FNumber, Exposure Time and ISO values.
Parameters: |
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Returns: | Image average luminance. |
Return type: | ndarray |
References
[1] | Wikipedia. (n.d.). EV as a measure of luminance and illuminance. Retrieved November 14, 2015, from https://en.wikipedia.org/wiki/Exposure_value#EV_as_a_measure_of_luminance_and_illuminance |
Examples
>>> average_luminance(8, 1, 100)
0.125