And this causes the import cv2 command to fail. And now i dont have the extra modules of opencv which i desperately need for my project. I'm running wheezy, and when I follow Dave's suggestion, I get 'unable to locate package python3-matplotlib' emeyeraway wrote:When I do 'sudo apt-get install python3-pip', I am told that my python3-pip is already the newest version. Your blog posts have helped me quite a bit. I remember seeing a few guides on how to retrograde parts of Jessie to Wheezy again, not sure what that means for installation. Do you have any pointers? The compilation should only take roughly 45 minutes. I followed your instructions, but I changed make to make -j 5 by doing that, make runs in parallel mode and utilize each core.
This is especially true when you have a complex sensor project like Project Curacao, which now has 17 sensors, with five more to come. I would only reboot when prompted to when upgrading the system in Step 0. Hey Joseph, I am sorry to hear about the error. My original distribution came with pygame for python3. So I need to save 1h of my time with the build operation.
In the rest of this blog post I provide detailed installation instructions for both the Raspberry Pi 2 and the Raspberry Pi B+. Hi Adrian, Thanks for the great tutorial! Second after this tut i can run any code with python for color tracking and controlling 2 servos for tracking the moving color? Somehow without that folder also the rest of the opencv got downloaded and installed and it works perfectly but i cant use the face recognition and other functions which are present in the extra modules. That said, since you are now to virtual environments, I would start there and make sure 1 your cv virtual environment has been created using the mkvirtualenv command and 2 you can access it via the workon command. Both of these distributions include matplotlib and lots of other useful tools. Works out of the box and thanks for the putting it together! That's the magic of having a tool that thousands of people have used for their own projects. However, after i reboot raspberry pi, i can not get into virtual environment any more. I tested with many my python code, it was just working good for not using import cv2.
Building on Windows The Python shipped from is compiled with Visual Studio 2008 for versions before 3. But I have a question about the workon cv command. To give some perspective, the Raspberry Pi 2 is faster than the majority of the desktops in my high school computer lab. If you are building on Windows, see. I ran raspi-config on startup and tried to expand the card by selecting 1 Expand Filesystem.
Do you know how can I solve it and show them together as your tutorial does? In order for matplotlib to work, you need to have the numpy library installed. The workon cv step is included as a manner of completeness. I am very new to plot. The last two lines list the installed system packages and installed Python packages and dump them to files, just for reference. Line 3 sets the minimum value, maximum value, and step value of the x axis.
First, Thank you for your tutorials. Regardless, I only recommend products or services I use personally and believe will add value to my readers. This was less than a month ago. I went the Py 2. Timings for each installation step were also provided so you could plan out the install accordingly.
Hi Nishanth, please make sure you are in the cv virtual environment prior to importing cv2. But I can use your help. Thanks in advance Hi Dr. Yes, you should stay in the cv environment for the rest of the steps. Alright, I will try that. How can I fix this? Thanks so much for the tutorial and for reading this.
Also, please take the time to read the comments on this post. Hi, Adiran I have an issue. I see I can run python and import the cv2 without any problems, without the virtual environment. I realized that I needed to do Steps 7 — 11 all in one day. Next, it is worth to have two packages installed. You can name these environments whatever you wish, I simply wanted to offer a clarification and hopefully remove any confusion. I have tried everything what was said in comments.
I am very new to using the Pi and coding, so your tutorial has helped me get a virtual environment and opencv installed, which would have been impossible otherwise. It could be possible that the cv2. Any ideas as to what may be the issue? In this month's column, I look at a fabulous although somewhat difficult for a beginner open source graphing program for Python called Matplotlib. The Wheezy repositories are old and the packages it contains are not being updated. Total compile time was a few hours. There are many steps in this process where the problem could arise, so please be sure to read through the comments and see which ones apply to you.
The statement in the next line generates sine data from the range of variable t derived in the previous step. Open up a terminal, enter the cv virtual environment or cv3 , if you followed the Python 2. All code examples covered in the book are guaranteed to run on the Raspberry Pi 2 and Pi 3 as well! I would check the lib directory of your build and see if your. Convert that filtered image to gray scale 5. Installing numpy in the cv3 env and it seems to be taking a long time while running setup.