Update README

Author: UnaNancyOwen

README.md

@@ -1,2 +1,66 @@
-# k4a_mkv2image
-Tool to convert mkv files to image files for Azure Kinect
+k4a_mkv2image
+=============
+This is convert tool that works on cross-platform (Windows, Linux) for Azure Kinect.  
+This tool converts all data of each stream types (Color, Depth, Infrared) that contained in mkv file to image file.  
+
+Sample
+------
+### Command
+```
+k4a_mkv2image -i="./file.mkv" -s=true -d=true
+```
+### Output
+Image files are output in the following folder structure.  
+Image file name is "\<file_index\>_\<device_timestamp\>.jpg".  
+The file index is sequencial number for output images. 
+The unit of device timestamp is microseconds.  
+```
+k4a_mkv2image.exe
+file.mkv
+file
+  |-color
+  |   |-000000_00000000000.jpg
+  |   |-000001_00000000033.jpg
+  |   |-000002_00000000066.jpg
+  |
+  |-depth
+  |   |-000000_00000000000.png
+  |   |-000001_00000000033.png
+  |   |-000002_00000000066.png
+  |
+  |-infrared
+      |-000000_00000000000.jpg
+      |-000001_00000000033.jpg
+      |-000002_00000000066.jpg
+```
+
+Option
+------
+| option | description                                                                           |
+|:------:|:--------------------------------------------------------------------------------------|
+| -i     | input mkv file path. (requered)                                                       |
+| -s     | enable depth scaling. <code>false</code> is raw 16bit image. (bool)                   |
+| -t     | enable transform depth to color camera. <code>false</code> is not transform. (bool)   |
+| -q     | jpeg encoding quality for infrared. [0-100]                                           |
+| -d     | display each images on window. <code>false</code> is not display. (bool)              |
+
+Environment
+-----------
+* Visual Studio 2017/2019 / GCC 7.4 / Clang 6.0 (require <code>\<filesystem\></code> supported) 
+* Azure Kinect Sensor SDK v1.3.0 (or later)
+* OpenCV 4.1.2 (or later)
+* CMake 3.15.4 (latest release is preferred)
+* Intel Thread Building Blocks (latest release is preferred)
+
+<sup>&#042; This tool requires Intel TBB only on Linux.</sup>  
+
+License
+-------
+Copyright &copy; 2019 Tsukasa SUGIURA  
+Distributed under the [MIT License](http://www.opensource.org/licenses/mit-license.php "MIT License | Open Source Initiative").
+
+Contact
+-------
+* Tsukasa Sugiura  
+    * <t.sugiura0204@gmail.com>  
+    * <http://unanancyowen.com>