File size: 3,607 Bytes
fea495a | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | /*!
Copyright 2013 Lovell Fuller and others.
SPDX-License-Identifier: Apache-2.0
*/
#ifndef SRC_OPERATIONS_H_
#define SRC_OPERATIONS_H_
#include <algorithm>
#include <functional>
#include <memory>
#include <tuple>
#include <vector>
#include <vips/vips8>
using vips::VImage;
namespace sharp {
/*
* Tint an image using the provided RGB.
*/
VImage Tint(VImage image, std::vector<double> const tint);
/*
* Stretch luminance to cover full dynamic range.
*/
VImage Normalise(VImage image, int const lower, int const upper);
/*
* Contrast limiting adapative histogram equalization (CLAHE)
*/
VImage Clahe(VImage image, int const width, int const height, int const maxSlope);
/*
* Gamma encoding/decoding
*/
VImage Gamma(VImage image, double const exponent);
/*
* Flatten image to remove alpha channel
*/
VImage Flatten(VImage image, std::vector<double> flattenBackground);
/*
* Produce the "negative" of the image.
*/
VImage Negate(VImage image, bool const negateAlpha);
/*
* Gaussian blur. Use sigma of -1.0 for fast blur.
*/
VImage Blur(VImage image, double const sigma, VipsPrecision precision, double const minAmpl);
/*
* Convolution with a kernel.
*/
VImage Convolve(VImage image, int const width, int const height,
double const scale, double const offset, std::vector<double> const &kernel_v);
/*
* Sharpen flat and jagged areas. Use sigma of -1.0 for fast sharpen.
*/
VImage Sharpen(VImage image, double const sigma, double const m1, double const m2,
double const x1, double const y2, double const y3);
/*
Threshold an image
*/
VImage Threshold(VImage image, double const threshold, bool const thresholdColor);
/*
Perform boolean/bitwise operation on image color channels - results in one channel image
*/
VImage Bandbool(VImage image, VipsOperationBoolean const boolean);
/*
Perform bitwise boolean operation between images
*/
VImage Boolean(VImage image, VImage imageR, VipsOperationBoolean const boolean);
/*
Trim an image
*/
VImage Trim(VImage image, std::vector<double> background, double threshold, bool const lineArt);
/*
* Linear adjustment (a * in + b)
*/
VImage Linear(VImage image, std::vector<double> const a, std::vector<double> const b);
/*
* Unflatten
*/
VImage Unflatten(VImage image);
/*
* Recomb with a Matrix of the given bands/channel size.
* Eg. RGB will be a 3x3 matrix.
*/
VImage Recomb(VImage image, std::vector<double> const &matrix);
/*
* Modulate brightness, saturation, hue and lightness
*/
VImage Modulate(VImage image, double const brightness, double const saturation,
int const hue, double const lightness);
/*
* Ensure the image is in a given colourspace
*/
VImage EnsureColourspace(VImage image, VipsInterpretation colourspace);
/*
* Split and crop each frame, reassemble, and update pageHeight.
*/
VImage CropMultiPage(VImage image, int left, int top, int width, int height,
int nPages, int *pageHeight);
/*
* Split into frames, embed each frame, reassemble, and update pageHeight.
*/
VImage EmbedMultiPage(VImage image, int left, int top, int width, int height,
VipsExtend extendWith, std::vector<double> background, int nPages, int *pageHeight);
/*
* Dilate an image
*/
VImage Dilate(VImage image, int const maskWidth);
/*
* Erode an image
*/
VImage Erode(VImage image, int const maskWidth);
} // namespace sharp
#endif // SRC_OPERATIONS_H_
|