histogram.h

Go to the documentation of this file.

/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * Copyright (C) 2019, Raspberry Pi Ltd
 *
 * histogram.h - histogram calculation interface
 */
 
#pragma once
 
#include <assert.h>
#include <limits.h>
#include <stdint.h>
 
#include <vector>
 
#include <libcamera/base/span.h>
 
namespace libcamera {
 
namespace ipa {
 
class Histogram
{
public:
    Histogram(Span<const uint32_t> data);
    size_t bins() const { return cumulative_.size() - 1; }
    uint64_t total() const { return cumulative_[cumulative_.size() - 1]; }
    uint64_t cumulativeFrequency(double bin) const;
    double quantile(double q, uint32_t first = 0, uint32_t last = UINT_MAX) const;
    double interQuantileMean(double lowQuantile, double hiQuantile) const;
 
private:
    std::vector<uint64_t> cumulative_;
};
 
} /* namespace ipa */
 
} /* namespace libcamera */