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Add experimental 'attention' crop strategy

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Lovell Fuller
2016-10-11 21:12:25 +01:00
parent 739178dd74
commit 18b9991fe7
21 changed files with 438 additions and 51 deletions
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19
src/operations.h
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@@ -1,8 +1,10 @@
#ifndef SRC_OPERATIONS_H_
#define SRC_OPERATIONS_H_
#include <tuple>
#include <algorithm>
#include <functional>
#include <memory>
#include <tuple>
#include <vips/vips8>
using vips::VImage;
@@ -63,14 +65,21 @@ namespace sharp {
VImage Sharpen(VImage image, double const sigma, double const flat, double const jagged);
/*
Calculate crop area based on image entropy
Crop strategy functors
*/
std::tuple<int, int> EntropyCrop(VImage image, int const outWidth, int const outHeight);
struct EntropyStrategy {
double operator()(VImage image);
};
struct AttentionStrategy {
double operator()(VImage image);
};
/*
Calculate the Shannon entropy for an image
Calculate crop area based on given strategy (Entropy, Attention)
*/
double Entropy(VImage image);
std::tuple<int, int> Crop(
VImage image, int const outWidth, int const outHeight, std::function<double(VImage)> strategy
);
/*
Insert a tile cache to prevent over-computation of any previous operations in the pipeline