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Algorithm to compare two images

Given two different image files (in whatever format I choose), I need to write a program to predict the chance if one being the illegal copy of another. The author of the copy may do stuff like rotating, making negative, or adding trivial details (as well as changing the dimension of the image). ...
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从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术

... ———Sloodle。通过介绍 Sloodle中的 Web-Intercom、MetaGloss、Choicer、Translator等工具 ,讨论了使用这种三维虚拟环境与 Web技术整合给学习系统带来的挑战和潜力。最后 ,总结并探讨了三维虚拟学习环境的发展趋势。 Sloodle 随着...
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... 14.7. 数组 14.8. awk的内建函数 15. How-to 1. awk简介 awk是一种编程语言,用于在linux/unix下对文本和数据进行处理。数据可以来自标准输入、一个或多个文件,或其它命令的输出。它支持用户自定...
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What does T&& (double ampersand) mean in C++11?

I've been looking into some of the new features of C++11 and one I've noticed is the double ampersand in declaring variables, like T&& var . ...
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How do I print a list of “Build Settings” in Xcode project?

Is there a Canonical list of Xcode Environment Variables that can be used in Build Rules etc? 7 Answers ...
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【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...uct socket *sock, int protocol, int kern) { ... list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { //inet_init->inet_register_protosw, inetsw_array err = 0; /* Check the non-wild match. */ if (protocol == answer->protocol) { if (protocol != IPPROTO_IP) brea...
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Why does struct alignment depend on whether a field type is primitive or user-defined?

In Noda Time v2, we're moving to nanosecond resolution. That means we can no longer use an 8-byte integer to represent the whole range of time we're interested in. That has prompted me to investigate the memory usage of the (many) structs of Noda Time, which has in turn led me to uncover a slight ...
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“Keep Me Logged In” - the best approach

My web application uses sessions to store information about the user once they've logged in, and to maintain that information as they travel from page to page within the app. In this specific application, I'm storing the user_id , first_name and last_name of the person. ...
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How to convert a number to string and vice versa in C++

Since this question gets asked about every week, this FAQ might help a lot of users. 4 Answers ...
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Best way to represent a fraction in Java?

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