cris | Light weight file sharing application with an Ethereum | Blockchain library

To show the error of the textField check if the Form is validate :

The first problem is that you are using the selectedState variable for all DropdownMenu widget. And this isn't practical and it could lead to unexpected behavior and bugs. You should define a separate variable for each DropdownMenu.

Another problem is the way you are initializing the selectedState variable. You are doing this: var selectedState;, without specifying a value so it gets a value of null by default.

However, the initial value of the selectedState varibale has to be one of the options of the DropdownMenu.
For example if these List options = ["Option 1", "Option 2", "Option 3", "Option 4"]; are your options for the DropdownMenu, then you would have to initialize the selectedState variable like this for example: var selectedState = "Option 1";.

And the error is gone!

• $group by Sender and Recipient, sum Credit and Debit amount after converting to integer using $toInt
• $project to show required fields and sum Credit and Debit field using $add
• $match to check NetAmount is not zero
• $sort by NetAmount in descending order

After chatting with Cris, it seems that there is no scaling factor, this type of DFT just works this way it seems. So the solution I have found is to increase the pixels to the point that I can zoom in and have a clear enough image. It's not a great solution but paired with LightPipes it is now possible to get an idea of what the transform of light modes will look like, as well as illustrate that at the image plane of a lens system they will appear as they did in the front focal field.

Everything went right after I upgraded Ubuntu to version 20.04.2 :)

If the FFT magnitude result is close to zero, it might just be numerical noise (random quantization and rounding errors). The phase of this numerical noise is nonsense. I usually set the phase to zero unless the corresponding magnitude is above some threshold for actual non-zero spectrum.

The padding will not change the boundary condition: You are padding by replicating the function, mirrored, four times. The function is symmetric, so the mirroring doesn't change it. Thus, your padding simply repeats the function four times. The convolution through the DFT (which you're attempting to implement) uses a periodic boundary condition, and thus already sees the input function as periodic. Replicating the function will not improve the convolution results at the edges.

To improve the result at the edges, you would need to implement a different boundary condition, the most effective one (since the input is analytical anyway) is to simply extend your domain and then crop it after applying the convolution. This introduces a boundary extension where the image is padded by seeing more data outside the original domain. It is an ideal boundary extension suitable for an ideal case where we don't have to deal with real-world data.

This implements the Laplace though the DFT with greatly simplified code, where we ignore any boundary extension, as well as the sample spacing (basically setting dx=1 and dy=1):

You may refer here to troubleshoot this[ WARN:0] global ../opencv/modules/videoio/src/cap_gstreamer.cpp (1766) handleMessage OpenCV | GStreamer warning: your GStreamer installation is missing a required plugin

Next, for the error of Openvino MFX: Unsupported extension: rtsp://cris:pass@192.167.1.175:444/live/ch0, please refer to this thread

Ok, here is one way to obtain what you want in about 2min. Some tickers are bad, that's why it crashes.

Here's the code. I use joblib for threading or multiprocess since it doesn't work in my env. But, that's the spirit.