HDR imaging

( Modified from https://github.com/SSARCandy/HDR-imaging )

Requirement

• C++ 11
• opencv 3.0 (or higher)
• lapack and lapacke

Usage

$ make clean && make
$ ./hdr <input img dir> <output .hdr name>

# for example
$ ./hdr taipei taipei.hdr

Input format

The input dir should have:

• Some .png images
• A image_list.txt, file should contain:
  • filename
  • exposure
  • 1/shutter_speed
  • number of images in the folder ( at the very first line )

This is an example for image_list.txt:

10
# Filename   exposure 1/shutter_speed
DSC_0058.png 32        0.03125
DSC_0059.png 16        0.0625
DSC_0060.png  8        0.125
DSC_0061.png  4        0.25
DSC_0062.png  2        0.5
DSC_0063.png  1        1
DSC_0064.png  0.5      2
DSC_0065.png  0.25     4
DSC_0066.png  0.125    8
DSC_0067.png  0.0625  16

Output

The program will output:

• A .hdr image

Environment

I test my code in Rock64 with Armbian 5.65 ( ubuntu 18.04 based ), but it should work fine in macOS/Linux/Windows ( maybe with some header swap to match opencv header on different OS )