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  Gaussian Blur Algorithm

Usually, image processing software will provide blur filter to make images blur. There are many algorithms to implement blur, one of them is called Gaussian Blur Algorithm. It utilizes Gaussian distribution to process images. This article is to introduce Gaussian Blur algorithm, you will find this is a simple algorithm. In fact, it is a kind of data smoothing which can be used in many situations. 1. Gaussian Blur theory The so called blur can be understood as taking a pixel as the average valu...

   ALGORITHM,GAUSSIAN BLUR, IMAGE BLUR     2020-09-12 02:34:40

  Should Small IT Companies Compete for Government Projects

No matter where in the world you look, you will find that various government agencies spend enormous amounts of money to procure products and services from outside companies. And while most of us immediately think about construction projects and perhaps defense contractors, a huge portion of government projects over the last decade or so were in the IT sector. In essence, governments on all levels often require services that their existing employees cannot handle and they invite outside IT comp...

   IT, BUSINESS, GOVERNMENT CONTRACTS     2017-12-28 17:51:09

  Pagination or continuous scrolling? It's a question

No matter in web page or mobile applications, information often can not be displayed on one page all alone, there needs some interactive modes which can expand page information: Pagination and Continuous Scrolling are very common interactive modes. Every day we may see them, they are so common that we do not even feel their presence, when browsing to the bottom of the page, we will see it. But it's difficult to choose which mode to use in design. Here we have a discussion on these two modes. Pag...

   Pagination,Continuous scrolling,Design     2012-09-12 19:55:51

  Why programmers are not paid in proportion to their productivity

The most productive programmers are orders of magnitude more productive than average programmers. But salaries usually fall within a fairly small range in any company. Even across the entire profession, salaries don’t vary that much. If some programmers are 10x more productive than others, why aren’t they paid 10x as much?Joel Spolsky gave a couple answers to this question in his most recent podcast. First, programmer productivity varies tremendously across the profession, but...

   Productivity,Salary,Efficiency,Programmer,Not match     2011-11-16 08:12:00

  What is good design?

Some quotes about good design from a Germany designer Dieter Rams in documentary "Objectified": Good design should be innovative Good design should make a product useful Good design is aesthetic design Good design will make a product understandable Good design is honest Good design is unobtrusive Good design is long-lived Good design is consistent in every detail Good design is environmentally friendly Good design is as little design as possible This brings up a question -- what...

   METRO,SIMPLICITY,GOOD DESIGN,PRINCIOPLE,UNIX PHILOSOPHY     2012-05-09 06:48:11

  Some laws of interactive design

The well known quote from Alan Cooper is   Conforming to the standard unless there is a better choice. There are some best practices in interaction design. How many do you know? 1. Fitts' Law The time from one start point to target point is determined by two parameters: The distance to the target and the size of the target. )D and W in above picture), the formula is : T=a+blog2(D/W+1). It was first proposed by Paul Fitts, it is mathematical model used to predict the time from any poin...

   interaction design, laws, Fitts' law     2012-11-16 11:25:24

  Becoming a Better Developer, Part 2: Know Your Core Competencies

If you're trying to grow your startup you've come to the right place. Get my 170-page ebook on how to grow a startup and join thousands of self-funded entrepreneurs by subscribing to my newsletter at right. For years business consultants have instructed businesses to “know your core competencies.” What this means is “know what you do well and stick to it.” For example: Harley Davidson makes great motorcycles. But they’re probably not so good at making per...

   Developer,Tips     2011-06-29 08:40:10

  Why Android Will Always Be Laggier Than iOS

One of the things that really stands out using an iPhone is just how smooth it feels compared to using Android. Where as Android is laggy, with a measurable interim between when you touch the screen and when the OS responds, iOS almost seems to anticipate what you want to do before your finger touches the display.How has Apple managed this incredible feat? A better question might be: “How has Google managed to screw up Android’s multitouch so much?” According to Andrew M...

   Android,iOs,Speed,UI Design,Lag     2011-12-07 03:17:18

  Restore mocked variables in GoLang unit test

One of the guarding principles of writing unit test is that there should be no real external calls for dependant services. Unit test should run by its own and can run without issues on any environment including local, build, test environment. This indicates there should be some mock responses whenever an external call is needed so that different unit test scenarios can be covered. How can this be done in GoLang? In GoLang, anything can be assigned to a variable even including functions. A variab...

   GOLANG,UNIT TEST,MOCK FUNCTION,RESTORE MOCK     2021-12-10 20:43:00

  GCC is compiled with C++ compiler

On 15 Aug, 2012, GCC merged a patch--Merge from cxx-conversion branch . This means GCC will be compiled with C++ compiler in the future, it also means that GCC will be implemented using C++. You may have following two puzzles: Why does GCC turn to C++? Without C++ compiler, how can we compile C++ codes? Why using C++? In GNU's C++ Conversion, we can find this description in the background section: Whether we use C or C++, we need to try to ensure that interfaces are easy to understan...

   GCC,C++,Compiler     2012-09-04 02:36:06

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