I installed fftw3 package for Ubuntu 11.10, then installed ImageMagick. While performing fft of images, i get following error
convert: delegate library support not built-in `framed_clown.jpg' (FFTW) # warning/fourier.c/ForwardFourierTransformImage/611.
there was no fftw delegate listed on
convert -list configure
how can i resolve this ??
I believe that uninstalling imagemagick, installing fftw and reinstalling IM afterwards should solve the problem.
For Windows users there are these precompiled binaries - http://blog.astrophotographytargets.com/2012/03/imagemagick-with-fftw-delegate-library-on-windows/
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).
I have Imagemagick running fine. However it is missing the lcms2 library that lets it utilise icc color profiles.So it was installed via RPM and also with for different versions of PHP with the PECL php wrapper. I have installed lcms2 also from RPM.
However imagemagick doesn't know anything about lcms2.
How can I add lcms2 delegate/library to my current imagemagick install?
Do I have to make my own build of imagemagick with flags to include lcms2? I hear lcms was removed from the Centos Imagemagick RPM due to security concerns.
Having Gstreamer 1.22 successfully installed I'm not able to configure the project to build OpenCV. CMake isn't able to find GStreamer on my machine. Any ideas how two address this issue?
Just found the solution:
Cmake is using FindGstreamerWindows.cmake to find GStreamer on Windows, which is using internal an environment variable called "GSTREAMER_DIR" pointing to ..\gstreamer\1.0\x86_64.
Please make sure GSTREAMER_DIR exists on your machine.
I recently compile Opencv 4.2 with GStreamer on Windows. I use settings for GStreamer as on the following pictures. Make sure you point to correct .lib and include directories. all_Library is gstapp-1.0.lib etc, when configuraing CMAKE to compile OpenCV.
I use Opencv 4.2, CMake 3.17.0 release candidate and Gstreamer 1.16.2 MSVC 64-bit (VS 2019) developer and runtime installer. The whole process is described here install OpenCV on windows GStreamer tutorial
The important part is to set up environmental variables to find Gstreamer Runtime. Into system variable path: add
xxx\1.0\x86_64\bin
xxx\1.0\x86_64\lib
xxx\1.0\x86_64\lib\gstreamer-1.0
Gstreamer pipe from c++ opencv program to the web.
This package is installing opencv and here it says that libtiff4 has no installation.
And here i set from libtiff4 to libtiff 5 so it says package broken
i used all update commands again but not recovering. can any one suggest me where am i mistaken ?
I have started to work on Rpi. I have worked on opencv on windows and ubuntu. Now I want to do Image porcessing on Rpi. I have installed latest version 2.4.8 on my Rpi. And I am able to open and display an image. However when I am trying to open webcam and display, it gives me error: HIGHGUI ERROR: v4l/v4l2: VIDIOC_CROPCAP.
Can anyone tell whats the problem ?
I haved the some error when trying to execute a code that does facedetection , i solved it by adding the files needed in my working folder (source folder).
you can show us the code to find out what exactly you need
If you are using prebuilt binaries, they may be built without v4l support. Try to build your own OpenCV with v4l checked. And of course before that install v4l with development files. You can follow this tutorial with how to install required dependicies explanied.