Harold2017

/**
 * Convert standard camera intrinsic and extrinsic parameters to a vtkCamera instance for rendering
 * Assume square pixels and 0 skew (for now).
 *
 * focal_len : camera focal length (units pixels)
 * nx,ny : image dimensions in pixels
 * principal_pt: camera principal point,
 *    i.e. the intersection of the principal ray with the image plane (units pixels)
 * camera_rot, camera_trans : rotation, translation matrix mapping world points to camera coordinates
 * depth_min, depth_max : needed to set the clipping range

Harold2017

// ------------------------------------------------------------------------
// Benchmark        LGCG Time   LTO Time  Iterations  LTCG Build  LTO Build
// ------------------------------------------------------------------------
// regex_boost         317 ns    69.1 ns     2133333   00:02.720   00:08.70
// regex_ctre          248 ns    4.79 ns     2800000   05:08.755   00:04.78
// regex_hyperscan    96.7 ns        n/a     7466667   00:52.487        n/a
// regex_re2           186 ns    3.97 ns     4072727   00:03.353   00:05.94
// regex_spirit       44.3 ns   0.644 ns    15448276   00:03.487   00:05.25
// regex_std          2371 ns    67.2 ns      280000   00:02.442   00:05.54
// regex_xpressive     552 ns     273 ns     1000000   00:05.369   00:11.52

Harold2017

/*
 * This is free and unencumbered software released into the public domain.
 *
 * For more information, please refer to <https://unlicense.org>
 */

//Regular text
#define BLK "\e[0;30m"
#define RED "\e[0;31m"
#define GRN "\e[0;32m"

Harold2017

#ifdef _MSC_VER
#include <intrin.h>

static inline int __builtin_ctz(unsigned x) {
    unsigned long ret;
    _BitScanForward(&ret, x);
    return (int)ret;
}

static inline int __builtin_ctzll(unsigned long long x) {

Harold2017

/*!
    This file contains code to convert unsigned integers to strings
    at compile-time, and then modify those strings include more
    information.
    
    One use case is to convert library MAJOR, MINOR, and PATCH
    numbers into a custom string (see below).
    
    Other types like signed integers and floats can be added
    with template specializition on the converter struct.

Harold2017

void OnPhotoCaptured(PhotoCapture.PhotoCaptureResult result, PhotoCaptureFrame photoCaptureFrame)
{
    Matrix4x4 cameraToWorldMatrix;
    photoCaptureFrame.TryGetCameraToWorldMatrix(out cameraToWorldMatrix);
    Matrix4x4 projectionMatrix;
    photoCaptureFrame.TryGetProjectionMatrix(out projectionMatrix);


    var imagePosZeroToOne = new Vector2(pixelPos.x / imageWidth, 1 - (pixelPos.y / imageHeight));
    var imagePosProjected = (imagePosZeroToOne * 2) - new Vector2(1, 1);    // -1 to 1 space

Harold2017

git commit stats

Commands to get commit statistics for a Git repository from the command line -
using git log, git shortlog and friends.

---

Harold2017

// circ_shift.h
// https://stackoverflow.com/questions/46077242/eigen-modifyable-custom-expression/46301503#46301503
// this file implements circShift, fftshift, and ifftshift for Eigen vectors/matrices.
//

#pragma once
#include <Eigen/Core>

template <bool B> using bool_constant = std::integral_constant<bool, B>;

Harold2017

/**
 * @brief   Mapping functions from Eigen data types to OpenCV
 * @author  Eugene Khvedchenya <ekhvedchenya@gmail.com>
 * @details This header file contains code snippet for easy mapping Eigen types to OpenCV and back with minimal overhead.
 * @more    computer-vision.talks.com/articles/mapping-eigen-to-opencv/
 * Features:
 *  - Mapping plain data types with no overhead (read/write access)
 *  - Mapping expressions via evaluation (read only acess)
 *
 * Known issues:

Harold2017

Qt without Xcode

How to use Qt Creator for software development on macOS without having to install Xcode

Justification

Qt refuses to install on macOS unless Apple's Xcode is installed beforehand. This is unfortunate because: