Raspberry PI is a wonderful system and OpenCV is an outstanding library for computer vision. Here is our how to install and configure OpenCV 3.2.0 for Python/C++ on a Raspberry PI 2 with Raspbian Jessie. On the Net there are many references on this subject, most of them have some missed point or reference to old versions.
The OpenCV library is one of the most relevant open source library for Computer Vision but it contains some very useful function for linear algebra and matrix manipulation. Here is shown how to use
cv::solve function to solve system of linear equation. As real example here is considered the case of parabola passes through 3 points.
To display an OpenCV image or video into your own MFC interface in Visual C++ you can use GDI's function but keep care of details.
Despite of Standard Deviation is one of most relevant parameter of descriptive statistics, it isn't available as common aggregation function for some SQL server. Here is described how to calculate and use standard deviation in a single select query. Finally a better and numerically stable sql procedure is shown.
This article describes what to do if some or all of your messages disappear when none of solutions form MozillaZine is working. Sometimes, wrong code in "X-Mozilla-Status" issued by Thunderbird hides all email in a mailbox. This might happens also with recent version of Thunderbird, anyway this article should be applicable to all version of the program because of simple text format of its mailboxes.
This article explains how to access to WebDav of OpenERP 7.0 from Windows, using map network drive. Only OpenERP over HTTPS/SSL is considered here. Using OpenERP over HTTP/8069 it's really discouraged.