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README.md
Some CMake Templates.
Conventions
Use CMake-GUI to generate Visual Studio 2010 project, then use Visual Studio to compile & run.
Most commonly, we build Makefile project:
Simple C project.提供外汇交易商Binary简介
cmake_minimum_required( . ) is needed in root CMakeLists.txt, always.
The $ is variable with value C , which is set by the project( C ) .
Simple C++ project.
I recommend Visual 提供外汇交易商Binary简介 Studio 2015 Community Edition.
3.4. Example to Show How to Modualize Your Project
3.5. Example with Support of Boost
Ubuntu install: sudo apt-get install libboost-all-dev .
3.6. Example with Support of OpenCV
Want to how to configure both opencv 2 & 3 on your system? Checkout my tutorial: HOWTO: OpenCV 2 & OpenCV 3 · Issue #4 · district10/cmake-templates.
opencv 2 or less
-
: for opencv2 or less (VS2010 😄 , Linux ❓ ) : for opencv3 (VS2010 ❓ , Linux 😄 )
3.7. Example with Support of Qt4
Be sure to make qmake 提供外汇交易商Binary简介 caught by CMake, put it in your $PATH .
Works like qmake -project , one ring to rule them all:
-
(VS2010 😄 , Linux 😄 ) (check out the configs.h.in file) (VS2010 😄 , Linux 😄 ) , works like qmake -project && qmake && make on Linux (VS2010 😄 , Linux 😄 )
3.8. Example with Support of Qt5
3.9. Get'提供外汇交易商Binary简介 em Together (advanced examples)
This part is called CMake in Action.
- a great cmake wrapper for lua, a great c++ wrapper for lua
- I forked it, and annotated (提供外汇交易商Binary简介 in chinese), it's really great! My fork: 4ker/luapp: Using lua in C++ style. Build system is CMake..
- Libs
- google test (gmock), for testing and benchmarking, etc 提供外汇交易商Binary简介
- cppformat, the missing string formating lib
- More documentation
- More elegant & illustrative examples
- Planned 提供外汇交易商Binary简介 Examples
- for Windows, link *.lib files
- for Linux, link *.a , *.so files, set rpath
- etc.
5. Snippets & Helper Functions
There are some utility functions in utilities.cmake , use include(utilities.cmake) to include, then use
- print_include_directories() to print all 提供外汇交易商Binary简介 included directories,
- print_all_linked_libraries(your_exe_or_lib) to print all linked libs,
- print_all_variables() to print 提供外汇交易商Binary简介 all variables
Tip, use cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=YES .. to generate compile commands (a json file).
算法之TEA
"TEA" 的全称为"Tiny Encryption Algorithm" 是1994年由英国剑桥大学的David j.wheeler发明的.
在安全学领域，TEA（Tiny Encryption Algorithm）是一种分组加密算法，它的实现非常简单，通常只需要很精短的几行代码。TEA 算法最初是由剑桥计算机实验室的 David Wheeler 和 Roger Needham 在 1994 年设计的。
TEA算法使用64位的明文分组和128位的密钥，它使用Feistel分组加密框架，需要进行 64 轮迭代，尽管作者认为 32 轮已经足够了。该算法使用了一个神秘常数δ作为倍数，它来源于黄金比率，以保证每一轮加密都不相同。但δ的精确值似乎并不重要，这里 TEA 把它定义为 δ=「(√5 - 1)231」（也就是程序中的 0×9E3779B9）。
之后 TEA 算法被发现存在缺陷，作为回应，设计者提出了一个 TEA 的升级版本——XTEA（有时也被称为“tean”）。XTEA 跟 TEA 使用了相同的简单运算，但它采用了截然不同的顺序，为了阻止密钥表攻击，四个子密钥（在加密过程中，原 128 位的密钥被拆分为 4 个 32 位的子密钥）采用了一种不太正规的方式进行混合，但速度更慢了二丶加密解密代码演示
实现结果
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LEVIR-CD
LEVIR-CD is a new large-scale remote sensing binary change detection dataset, which would help develop novel deep learning-based algorithms for remote sensing image change detection.
Overview of LEVIR-CD
LEVIR-CD is a new large-scale remote sensing building Change Detection dataset. The introduced dataset would be a new benchmark for 提供外汇交易商Binary简介 evaluating change detection (CD) algorithms, especially those based on deep learning.
LEVIR-CD consists of 637 very high-resolution (VHR, 0.5m/pixel) Google Earth (GE) image patch pairs with a size of 1024 × 1024 pixels. These bitemporal images with time span of 5 to 提供外汇交易商Binary简介 提供外汇交易商Binary简介 提供外汇交易商Binary简介 14 years have significant land-use changes, especially the construction growth. LEVIR-CD covers various types 提供外汇交易商Binary简介 提供外汇交易商Binary简介 of buildings, such as villa residences, tall apartments, small garages and large warehouses. Here, we focus on building-related changes, including the building growth (the change from soil/grass/hardened ground or 提供外汇交易商Binary简介 building under construction to new build-up regions) and the building decline. These bitemporal images are annotated by remote sensing image interpretation experts using binary labels (1 for change and 0 for unchanged). Each sample in our dataset is annotated by one annotator and then double-checked by another to produce high-quality annotations. The fully annotated LEVIR-CD contains a total of 31,333 individual change building instances.
Geospatial Distribution of LEVIR-CD
The bitemporal images in 提供外汇交易商Binary简介 提供外汇交易商Binary简介 LEVIR-CD are from 20 different regions that sit in several cities in Texas of the US, including Austin, Lakeway, Bee Cave, Buda, Kyle, Manor, Pflugervilletx, Dripping Springs, etc. The Figure below illustrates the geospatial distribution of our new dataset and an enlarged image patch. The captured time of our image data varies from 2002 to 2018. Images in different regions may be taken at different times. We want to introduce variations due to seasonal changes and illumination changes into our new dataset, which could help develop effective methods that can mitigate the impact of irrelevant changes on real changes.
Examples of annotated samples
Samples size of 1024 × 1024
Cropped samples size of 256 × 256
Usage
The use 提供外汇交易商Binary简介 提供外汇交易商Binary简介 of the images from Google Earth must respect the Google Earth terms of use. All images and annotations in LEVIR-CD can only be used for academic purposes, but 提供外汇交易商Binary简介 are prohibited for any commercial use.
About
We are from LEVIR, which is the abbreviation of ours’ laboratory: LEarning, VIsion and Remote sensing laboratory. Visit the lab homepage for more 提供外汇交易商Binary简介 details.
If you have any the problem or feedback in using LEVIR-CD, please contact
提供外汇交易商Binary简介
A character string literal, hexadecimal literal, or bit-value literal may have an optional character set introducer and COLLATE clause, to designate it as a string that uses a particular character set and collation:
The _ charset_name expression is formally called an introducer . It tells the parser, “ the string that follows uses character set charset_name . ” An introducer does not change the string to the introducer character set like CONVERT() would do. It does not 提供外汇交易商Binary简介 提供外汇交易商Binary简介 change the string value, although padding may occur. The introducer is just a signal.
For 提供外汇交易商Binary简介 提供外汇交易商Binary简介 character string literals, space between the introducer and the string is permitted but optional.提供外汇交易商Binary简介
For character set literals, an introducer indicates the character set for the following string, but does not change how the parser performs escape processing within the string. Escapes are always interpreted by the parser according to the character set given by character_set_connection . For 提供外汇交易商Binary简介 additional discussion and examples, see Section 10.3.6, “Character String Literal Character Set and 提供外汇交易商Binary简介 Collation”.
Character set introducers and the COLLATE clause are implemented according to standard SQL 提供外汇交易商Binary简介 specifications.
Character string literals can be designated as binary strings by using the _binary 提供外汇交易商Binary简介 introducer. Hexadecimal literals and bit-value literals are binary strings by default, so _binary is permitted, but unnecessary.
MySQL determines the character set and collation of a character string literal, hexadecimal literal, or bit-value literal in the following manner:
If both _charset_name and COLLATE collation_name are specified, character set charset_name and collation collation_name are used. collation_name must be a permitted collation for charset_name .
If _charset_name is specified but COLLATE is not specified, character set charset_name and its default collation are used. To see the default collation for each character set, use the SHOW CHARACTER SET statement or query the INFORMATION_SCHEMA CHARACTER_SETS table.
If _charset_name is not specified but COLLATE collation_name is specified:
For a character string 提供外汇交易商Binary简介 literal, the connection default character set given by the character_set_connection system variable and collation collation_name are used. collation_name must be a permitted collation for the connection default character set.
For a hexadecimal literal or bit-value literal, the only permitted collation is binary because these types of literals are binary strings by default.
Otherwise (neither _charset_name nor COLLATE collation_name 提供外汇交易商Binary简介 is specified):
For a character string literal, the connection default character set and collation 提供外汇交易商Binary简介 given by the character_set_connection and collation_connection system variables are used.
For a hexadecimal literal 提供外汇交易商Binary简介 or bit-value literal, the character set and collation are binary .
Nonbinary strings with latin1 character set and latin1_german1_ci collation:
Nonbinary strings with utf8 character set and its default collation (that is, utf8_general_ci ):
Binary strings with binary character set and its default collation (that is, binary ):
The hexadecimal literal and bit-value literal need no introducer because they are binary 提供外汇交易商Binary简介 提供外汇交易商Binary简介 strings by default.
A nonbinary string with the connection default character set and utf8_general_ci 提供外汇交易商Binary简介 提供外汇交易商Binary简介 collation (fails if the connection character set is not utf8 ):
This construction ( COLLATE only) 提供外汇交易商Binary简介 does not work for hexadecimal literals or bit literals because their character set is binary no matter the connection character set, and binary is not compatible with the utf8_general_ci 提供外汇交易商Binary简介 collation. The only permitted COLLATE clause in the absence of an introducer is COLLATE binary .