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Name	Size	Permission	Action
binding.gyp	9.62 KB	-rw-rw-r--
common.cc	36.83 KB	-rw-rw-r--
common.h	10.41 KB	-rw-rw-r--
metadata.cc	10.75 KB	-rw-rw-r--
metadata.h	1.57 KB	-rw-rw-r--
operations.cc	15.39 KB	-rw-rw-r--
operations.h	3.3 KB	-rw-rw-r--
pipeline.cc	79.05 KB	-rw-rw-r--
pipeline.h	9.18 KB	-rw-rw-r--
sharp.cc	1.43 KB	-rw-rw-r--
stats.cc	6.5 KB	-rw-rw-r--
stats.h	1.18 KB	-rw-rw-r--
utilities.cc	8.71 KB	-rw-rw-r--
utilities.h	677 B	-rw-rw-r--

Code Editor : operations.h

// 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 <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);

/*
   * Convolution with a kernel.
   */
  VImage Convolve(VImage image, int const width, int const height,
    double const scale, double const offset, std::unique_ptr<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::unique_ptr<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);

}  // namespace sharp

#endif  // SRC_OPERATIONS_H_

Urban Research Lab

Urban Research Lab

The Urban Research Lab (URL) at IIIT-Delhi was established in 2020, during a time when the pandemic brought the complexities of urban life more visible than ever. What started as an initiative by faculty and students has grown into a collaborative space for critically exploring and reimagining the urban questions through research, dialogue, and interdisciplinary engagement.