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QUESTION
In my previous post, we found a way to pass an image file from one python to another: pass video data from one python script to another
I am now trying to pass a video (successive images):
write.py
...ANSWER
Answered 2021-Mar-08 at 17:17I think I figured it out. In read.py, sys.stdin.buffer.read() reads and waits until the stdin pipe is closed but write.py never actually closes its stdout because of the while True loop. This proof of concept simplified example works:
write.py
QUESTION
I am trying to upload two FormField objects along with form data to express.
The part im stuck at is using the multer library in express to extract this data from the request. I can access the form data but not the FormField objects.
in angular:
...ANSWER
Answered 2021-Apr-06 at 19:20You can refer this post on url https://javascript.plainenglish.io/uploading-files-using-multer-on-server-in-nodejs-and-expressjs-5f4e621ccc67
I just followed it yesterday to make it work Seems your multer is not configured in the way it should be
QUESTION
I am trying to show a certain piece of text when the list length is greater than one.
Initially when the streamlit app is run there are no files in the uploaded images list so I dont want to show the Uploaded Images text but when a person uploads images I want to show the "Uploaded Images :" text.
How do you listen to the length of a list and execute code according to its change.
My Code:
...ANSWER
Answered 2021-Feb-28 at 16:17Here is my idea: since the image_list will contain as many images as the ones in uploaded_files you can simply do this:
QUESTION
So I am using a camera module which only has python>3.7 support. I am trying to use that data to do some machine learning. Unfortunately, the machine learning module only has python<3.7 support. I was thinking I could launch a script to grab the video images using python3.8 and then catch the images using a websocket or zmq in python 3.6. Is there a faster way to do this?
Solved following advice in the replies:
...ANSWER
Answered 2021-Feb-19 at 13:58Using standard OS functionality, pipe the output from the video capture script to the ML script:
QUESTION
I have created an application in VB.NET but when this code runs:
...ANSWER
Answered 2021-Feb-04 at 17:50I found the error.
QUESTION
I am trying to make a program that displays a traffic light sequence. I have made a mistake in the code so it doesn't get past showing the red light when the "starts sequence" button is clicked. if you can see where I went wrong please help me get it working.
I have used functions to change the display of the different lights. when the start sequence button is clicked the change function should call each function (stop,ready,go) which change the brightness of the lights in order from red to amber to green and back.
...ANSWER
Answered 2020-Dec-10 at 18:15You're calling all setTimeout at the same time, so they all trigger after 2 seconds. You could solve it by calling each timeout after the previous one has finished. Also, you don't need to find the elements again in each function call.
QUESTION
import React from "react";
import ReactDOM from "react-dom";
var bImg = prompt("Which image do you want to set as background image?");
const bStyle = {
backgroundImage: "url(bImg)" // i stored the link here
};
const rootElement = document.getElementById("root");
ReactDOM.render(
// I stored it here but still it won't show up
Hello world!!
,
rootElement
);
ANSWER
Answered 2020-Dec-08 at 23:07QUESTION
The Context
Currently, I have a solution where I loop through a PDF and draw black rectangles throughout it.
So I already have a PDRectangle list representing the right areas I need to fill/cover on the pdf, hiding all the texts I want to.
The Problems
Problem number 1: The text underneath the black rectangle is easily copied, searchable, or extracted by other tools.
I solved this by flattening my pdf (converting it into an image so that it becomes a single layer document and the black rectangle can no longer be tricked). Same solution as described here: Disable pdf-text searching with pdfBox
This is not an actual redacting, it's more like a workaround. Which leads me to
Problem number 2:
My final PDF becomes an image document, where I lose all the pdf properties, including searching, copying... also it's a much slower process. I wanted to keep all the pdf properties while the redacted areas are not readable by any means.
What I want to accomplish
That being said, I'd like to know if it is possible and how I could do an actual redacting, blacken out rectangles areas since I already have all the positions I need, with PDFBox, keeping the pdf properties and not allowing the redacted area to be read.
Note: I'm aware of the problems PDFBox had with the old ReplaceText function, but here I have the positions I need to make sure I'd blank precisely the areas I need.
Also, I'm accepting other free library suggestions.
Technical Specification:
PDFBox 2.0.21
Java 11.0.6+10, AdoptOpenJDK
MacOS Catalina 10.15.4, 16gb, x86_64
My Code
This is how I draw the black rectangle:
...ANSWER
Answered 2020-Nov-19 at 15:43What you want to have, a true redaction feature, is possible to implement based on PDFBox but it requires a lot of coding on top of it (similar to the pdfSweep add-on implemented on top of iText).
In particular you have found out yourself that it does not suffice to draw black rectangles over the areas to redact as text extraction or copy&paste from a viewer usually completely ignores whether text is visible or covered by something.
Thus, in the code you do have to find the actual instruction drawing the text to redact and remove them. But you cannot simply remove them without replacement, otherwise additional text on the same line may be moved by your redaction.
But you cannot simply replace them with the same number of spaces or a move-right by the width of the removed text: Just consider the case of a table you want to redact a column from with only "yes" and "no" entries. If after redaction a text extractor returns three spaces where there was a "yes" and two spaces where there was a "no", anyone looking at those results knows what there was in the redacted area.
You also have to clean up instructions around the actual text drawing instruction. Consider the example of the column to redact with "yes"/"no" information again, but this time for more clarity the "yes" is drawn in green and the "no" in red. If you only replace the text drawing instructions, someone with an extractor that also extracts attributes like the color will immediately know the redacted information.
In case of tagged PDFs, the tag attributes have to be inspected too. There in particular is an attribute ActualText which contains the actual text represented by the tagged instructions (in particular for screen readers). If you only remove the text drawing instructions but leave the tags with their attributes, anyone reading using a screen reader may not even realize that you tried to redact something as his screen reader reads the complete, original text to him.
For a proper redaction, therefore, you essentially have to interpret all the current instructions, determine the actual content they draw, and create a new set of instructions which draws the same content without unnecessary extra instructions which may give away something about the redacted content.
And here we only looked at redacting the text; redacting vector and bitmap graphics on a PDF page has a similar amount of challenges to overcome for proper redaction.
...
Thus, the code required for actual redaction is beyond the scope of a stack overflow answer. Nonetheless, the items above may help someone implementing a redactor not to fall into typical traps of too naive redaction code.
QUESTION
tldr; How do you use a MouseEvent on a JFrame object(specifically JLabel) to update the displayed image in the JFrame
I am trying to create a program where an image is broken into tiles and on click of one of those tiles, the program moves the tile to the open space in the image. (See Sliding Puzzle for more information).
I currently am able to select an image, break the image into tiles, and "randomly" remove one of the tiles.
My next step would be, on click of one of the tiles, to swap it with the empty tile (I will work on the "eligibility" of tiles to be swapped at a later time, but for now, just want to be able to swap the tile selected with the current blank tile)
To create my image for a 3x3 grid, I split a bufferedImage into 9 equal pieces, "randomly" blank one of the images, and then display the images in jLabels using GridLayout to line them up.
When I add mouseListeners to each jLabel, I am able to see that I am entering the MouseListener as I can see the console log message "Clicked" as shown below, however, am not able to update the image as desired.
How can I use a MouseEvent on these JFrame JLabels to call a method within ImageContainer(i.e. move()) and update the displayed image?
...ANSWER
Answered 2020-Oct-20 at 14:02Create a custom JLabel class to hold the position (i):
QUESTION
My java code below's goal is to export a image in a 400 X 400 format. Right now the code does export a image. However it exports the image in its original size. I don't know why it does not export in its desired format. There are no errors present. The goal is just to some how get line
...ANSWER
Answered 2020-May-08 at 16:08If you want to create a scaled version of bimg in scaledButtonImage then this line:
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