I have to read an ODS data file in octave. After some search I knew that I should use the ods library for octave but I don't know how to install it.
So how to install ods library for octave using brew on OSX?
Related
I'm running PHP 7.4 on an AWS Linux 2 instance. PHP 7.4 comes with imagick module 3.4.4 compiled by ImageMagick 6.9.10-6, but it doesn't have support for WEBP enabled.
I've installed the libwebp-devel library, but I can't figure out how to recompile the imagick module to support webp. I tried installing from the PECL source a la this comment, but when I check php -i WEBP still isn't listed under supported formats.
I also tried installing ImageMagick from source, and while I was able to get WEBP conversion going in the command line, the PHP extension still doesn't show support.
I'm not currently expert at PHP, but after reading this post Understanding PHP library installation and knowing some linux ecosystem, I think that after recompiling ImageMagick, you have to tell to the imagick module, that you have new version of ImageMagick. Or even recompile module (according to this site: https://help.dreamhost.com/hc/en-us/articles/217253537-Installing-ImageMagick-and-the-imagick-PHP-module-on-Shared-hosting).
OpenCV 2.3.1 uses libtiff as 3rd party library.
And I want to know which version of libtiff is used for a security reason.
But libtiff source code in opencv dose not show a version.
What is libtiff version of OpenCV 2.3.1?
Or is there any list of 3rd party libraries`s version for opencv ?
I realize how to figure out it.
I do share the information.
check it out from
opencv-2.3.1\3rdparty\tiffvers.h
Version is written in that file.
I have two versions of libjpeg library. One is the system library /usr/lib/x86_64-linux-gnu/libjpeg.so, and the another is the newer one that I have built manually /vol/me/lib/libjpeg.so. I want to install opencv that uses the new library instead of the system one. How can I use cmake/cmake-gui to do that?
I have a problem trying to get a webcam in OpenCV 2.3 to work with Cygwin. I have a Windows 7 64-bit system and I use Notepad++ and cygwin compilers to do my C++ programming. I have seen other posts with similar problems:
Getting Webcam to work in OpenCV
Can't access webcam with OpenCV
I first tried installing OpenCV via the Cygwin Ports. This is rather easy to install, but alas I run into the webcam problem (always returns false when trying to find a device). I have also attempted to build OpenCV and install manually using the command line flavor of CMake. I tried adding the HAVE_VIDEOINPUT and HAVE_DSHOW flags, but no dice. All my programs compile nicely and I have all the functionality of OpenCV aside for this webcam thing.
Has anyone successfully built OpenCV 2.3 on Cygwin with webcam working?
It is unlikely that cygwin build of OpenCV will be able to access a webcam. At least it is not possible without hacking OpenCV cmake scripts. Under cygwin OpenCV build always follows the UNIX branch and videoinput/directshow is excluded from build.
sir,
I have tried my level best to install open cv library 2.2.0 version.but it has'nt suceeded
it shows that errors in linking the library hughigh,
whether we wanted to insatll the ipp library prior to install the opencv?
please help me ?..............
I can only recommend the install advice on the OpenCV page. If you are using a unix download the source of the library you want to install and then use cmake to install the library. That usually works fine for me.
Try installing the 1.1 version of OpenCV.
The 2.x version is brand new and as of Nov 1 2009 you will have difficulty finding documentation for that. The 1.1 version of OpenCV, on the other hand, is very well documented and you should have no trouble finding online tutorials for your platform that walk you through the installation process step-by-step.
As an aside: "IPP" refers to Intel's Performance Primitives. In the 1.1 version these are entirely optional. OpenCV does not require them. If you have the Performance Primitives installed, however, your OpenCV code may run faster. (For me it cut down my image processing time by a factor of five.) Once you get everything up and running you can purchase the IPP library from intel here: http://software.intel.com/en-us/intel-ipp/