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| | Histogram () |
| | Construct an empty Histogram.
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| | Histogram (Span< const uint32_t > data) |
| | Create a cumulative histogram.
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| template<typename Transform, std::enable_if_t< std::is_invocable_v< Transform, uint32_t > > * = nullptr> |
| | Histogram (Span< const uint32_t > data, Transform transform) |
| | Create a cumulative histogram.
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| size_t | bins () const |
| | Retrieve the number of bins currently used by the Histogram.
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| const Span< const uint64_t > | data () const |
| | Retrieve the internal data.
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| uint64_t | total () const |
| | Retrieve the total number of values in the data set.
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| uint64_t | cumulativeFrequency (double bin) const |
| | Cumulative frequency up to a (fractional) point in a bin.
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| double | quantile (double q, uint32_t first=0, uint32_t last=UINT_MAX) const |
| | Return the (fractional) bin of the point through the histogram.
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| double | interQuantileMean (double lowQuantile, double hiQuantile) const |
| | Calculate the mean between two quantiles.
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The base class for creating histograms.
This class stores a cumulative frequency histogram, which is a mapping that counts the cumulative number of observations in all of the bins up to the specified bin. It can be used to find quantiles and averages between quantiles.
| uint64_t libcamera::ipa::Histogram::cumulativeFrequency |
( |
double | bin | ) |
const |
Cumulative frequency up to a (fractional) point in a bin.
- Parameters
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| [in] | bin | The bin up to which to cumulate |
With F(p) the cumulative frequency of the histogram, the value is 0 at the bottom of the histogram, and the maximum is the number of bins. The pixels are spread evenly throughout the “bin” in which they lie, so that F(p) is a continuous (monotonically increasing) function.
- Returns
- The cumulative frequency from 0 up to the specified bin