In graphics and signal processing, there are many filters to compute data. We show two signal processing filters Gaussian filter and tent filter at our web tool 3D Model Editor. Gaussian Filter The resulting function is The 2D Gaussian filter, which is both separable and radially symmetric. Tent Read more…
The post shows a simple example about how to display a selected image by opencv.js in web page. <div> <div class=”inputoutput”> <img id=”imageSrc” alt=”No Image” style=”display: none;”> <div class=”caption”><input type=”file” id=”fileInput” name=”file”></div> </div> <div class=”inputoutput”> <canvas id=”canvasOutput”></canvas> </div> </div> <script async=”” src=”/functions/opencv/opencv.js” type=”text/javascript”></script> <script type=”text/javascript”> let imgElement = document.getElementById(‘imageSrc’); let Read more…
You may have encountered a situation where the downloaded file was damaged and didn’t open smoothly. The method to verify whether the file has changed is the information summary algorithm. It analyzes the contents of the file and generates a hash string. Compare your file hash value with someone else’s Read more…
Download cryptography library and build for wasm Download cryptography source code at GitHub, cryptopp. Go to cryptopp folder which contains GNUmakefile. Build it to generate C++ library and execute file. make static dynamic cryptest.exe Create a new folder build and move all generated files into it. mv *.o *.so *.a Read more…
I lost my Kindle half a month ago.It was the 499 yuan starter I bought in college.I think it’s extinct now.I used this tool for seven years.Read hundreds of books, including novels, comics, and technical books.Last night when I tried to buy a better Kindle device, I went to Amazon Read more…
We can use vtkTransform’s function concatenate to do matrix multiplication. There are three matrix which have the mathematical relationship. It’s equivalent to the following code. vtkSPtrNew( C, vtkTransform ); C->Concatenate(B); C->Concatenate(A); C->Update(); The experimental code: #include <iostream> #include <vtkSmartPointer.h> #include <vtkTransform.h> #define vtkSPtr vtkSmartPointer #define vtkSPtrNew(Var, Type) vtkSPtr<Type> Read more…
We have to clear actors in vtkCellPicker object before InitializePickList. In the function Pick, the picker object will addItem to increase its reference count. So we need to do the following tasks for picker object in class destructor function to avoid crash or weird visible bug.
The following shell script is used to rename the files suffix at the current directory. After giving it the executable permission, we can use it like Code snippet: Result:
The following shell script is used to rename the files at the current directory. After giving it the executable permission, we can use it like Code snippet: Result: