"""
    The Horn-Schunck method estimates the optical flow for every single pixel of
    a sequence of images.
    It works by assuming brightness constancy between two consecutive frames
    and smoothness in the optical flow.

    Useful resources:
    Wikipedia: https://en.wikipedia.org/wiki/Horn%E2%80%93Schunck_method
    Paper: http://image.diku.dk/imagecanon/material/HornSchunckOptical_Flow.pdf
"""

from typing import SupportsIndex

他指出“有迹象表明” 开发者在未来几年将面对越来越多的大问题。他引用了大众美国区首席执行官 Michael Horn 在国会听证会时的发言，[Michael Horn 一开始将排放门丑闻归咎于程序员](http://www.theverge.com/2015/10/8/9481651/volkswagen-congressional-hearing-diesel-scandal-fault)，宣称程序员“不知出于何理由”自作主张。Horn 在 [公司受到检察机关指控](http://www.businessinsider.com/volkswagen-vw-emission-scandal-new-york-attorney-general-massive-cover-up-matthias-muller-2016-7) 该决定为高层决策并且试图隐瞒真相  [不久之后引咎辞职](http://www.businessinsider.com/volkswagens-us-boss-horn-departs-2016-3)。

As always, thanks to our many contributors who contributed countless hours
of their free time to making this release happen:

Anatoliy Yastreb, Anthony Gaudino, Antonio, Ashwin Maroli, Ben Balter,
Charles Horn, Chris Finazzo, Daniel Chapman, David Zhang, Eduardo
Bouças, Edward Thomson, Eloy Espinaco, Florian Thomas, Frank Taillandier,
Gerardo, Heng Kwokfu, Heng, K. (Stephen), Jeff Kolesky, Jonathan Thornton,

        "folding chair",
        "football helmet",
        "forklift",
        "fountain",
        "fountain pen",
        "four-poster",
        "freight car",
        "French horn, horn",
        "frying pan, frypan, skillet",
        "fur coat",
        "garbage truck, dustcart",
        "gasmask, respirator, gas helmet",
        "gas pump, gasoline pump, petrol pump, island dispenser",

ž	z<	017E	0382	LATIN SMALL LETTER Z WITH CARON
Ơ	O9	01A0	0416	LATIN CAPITAL LETTER O WITH HORN
ơ	o9	01A1	0417	LATIN SMALL LETTER O WITH HORN
Ƣ	OI	01A2	0418	LATIN CAPITAL LETTER OI
ƣ	oi	01A3	0419	LATIN SMALL LETTER OI
Ʀ	yr	01A6	0422	LATIN LETTER YR
Ư	U9	01AF	0431	LATIN CAPITAL LETTER U WITH HORN
ư	u9	01B0	0432	LATIN SMALL LETTER U WITH HORN
Ƶ	Z/	01B5	0437	LATIN CAPITAL LETTER Z WITH STROKE
ƶ	z/	01B6	0438	LATIN SMALL LETTER Z WITH STROKE

    Marek Belski
    Markus Ort
    Matthieu Huvé
    Michael
    Mike King
    Nassor Paulino da Silva
    nate-wilkins
    Nathan Warden
    Neal Gompa (Conan Kudo)
    Ninja_5tyl3
    Patrick Horn
    Patrick Schmidt
    Rami
    Ronnie Cheng
    Ryan Heath
    Samantha
    ShikadiGum
    Slobodan Milnovic
    Stephan Lanfermann
    Steve
    Thomas Krampl
    Tim Yuen
    Violin Iliev

column
combine
come
comfort
comic
common
company
concert
conduct
confirm
congress
connect
consider
control
convince
cook
cool
copper
copy
coral
core
corn
correct
cost
cotton
couch
country
couple
course
cousin
cover
coyote
crack
cradle
craft
cram
crane
crash
crater
crawl
crazy
cream
credit

ž	z<	017E	0382	LATIN SMALL LETTER Z WITH CARON
Ơ	O9	01A0	0416	LATIN CAPITAL LETTER O WITH HORN
ơ	o9	01A1	0417	LATIN SMALL LETTER O WITH HORN
Ƣ	OI	01A2	0418	LATIN CAPITAL LETTER OI
ƣ	oi	01A3	0419	LATIN SMALL LETTER OI
Ʀ	yr	01A6	0422	LATIN LETTER YR
Ư	U9	01AF	0431	LATIN CAPITAL LETTER U WITH HORN
ư	u9	01B0	0432	LATIN SMALL LETTER U WITH HORN
Ƶ	Z/	01B5	0437	LATIN CAPITAL LETTER Z WITH STROKE
ƶ	z/	01B6	0438	LATIN SMALL LETTER Z WITH STROKE

    // 2\. 多行字符串 :: 这样写:
    let childe_roland = 
    `I saw them and I knew them all. And yet
    Dauntless the slug-horn to my lips I set,
    And blew “Childe Roland to the Dark Tower came.”`

    // . . . 代替下面的写法:
    child_roland = 
    'I saw them and I knew them all. And yet\n' +
    'Dauntless the slug-horn to my lips I set,\n' +
    'And blew “Childe Roland to the Dark Tower came.”';

    // ==================================

## Computer Vision
  * [Cnn Classification](computer_vision/cnn_classification.py)
  * [Flip Augmentation](computer_vision/flip_augmentation.py)
  * [Harris Corner](computer_vision/harris_corner.py)
  * [Horn Schunck](computer_vision/horn_schunck.py)
  * [Mean Threshold](computer_vision/mean_threshold.py)
  * [Mosaic Augmentation](computer_vision/mosaic_augmentation.py)
  * [Pooling Functions](computer_vision/pooling_functions.py)