diff options
Diffstat (limited to 'src/ipa/libipa/histogram.h')
| -rw-r--r-- | src/ipa/libipa/histogram.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/ipa/libipa/histogram.h b/src/ipa/libipa/histogram.h index 05bb4b80..032adca0 100644 --- a/src/ipa/libipa/histogram.h +++ b/src/ipa/libipa/histogram.h @@ -2,7 +2,7 @@ /* * Copyright (C) 2019, Raspberry Pi Ltd * - * histogram.h - histogram calculation interface + * histogram calculation interface */ #pragma once @@ -10,10 +10,11 @@ #include <assert.h> #include <limits.h> #include <stdint.h> - +#include <type_traits> #include <vector> #include <libcamera/base/span.h> +#include <libcamera/base/utils.h> namespace libcamera { @@ -22,7 +23,19 @@ namespace ipa { class Histogram { public: + Histogram() { cumulative_.push_back(0); } Histogram(Span<const uint32_t> data); + + template<typename Transform, + std::enable_if_t<std::is_invocable_v<Transform, uint32_t>> * = nullptr> + Histogram(Span<const uint32_t> data, Transform transform) + { + cumulative_.resize(data.size() + 1); + cumulative_[0] = 0; + for (const auto &[i, value] : utils::enumerate(data)) + cumulative_[i + 1] = cumulative_[i] + transform(value); + } + size_t bins() const { return cumulative_.size() - 1; } uint64_t total() const { return cumulative_[cumulative_.size() - 1]; } uint64_t cumulativeFrequency(double bin) const; |