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I'm trying to build a function to convert a color image to monochrome. There's a lot of confusion around terminology, but I'm talking about true black-and-white, where we only have 2 colors: black and white - no grays.

Here is an example of what I'm trying to achieve:

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I also wanted a way to control the "threshold" of the conversion (i.e. how "bright" does a pixel have to be to produce a white pixel).

Here is what I have right now.

I am looking to pass multiple parameters in my RMarkdown document. I have the following as an example:

I have seen @adamwathan's live streams & he does className="w-5 h-5 text-white" fill="currentColor" to style an SVG through Tailwind.

How can I do the same for linearGradient?

I have the following SVG:

I have a small tracking project that I am working on. I have my frame by frame detection scheme setup and working. When I run I get a fair amount of noise in the polygon that I extract even if the scene is static. Since I want this run in real time, it seems Kalman filtering is the best way to solve this problem; however implementation details are sparse. I have seen some examples via google, but they typically deal with bounding boxes or regular shapes, which are described with only a few bits of info. I am not sure that approach would work.

I am interested in tracking the evolution of a more irregular geometry below. It takes ~100 points or more to describe the polygon. How can I adapt the OpenCV kalman tools to handle this task?

Thanks in advance.

** Update **

So additional details. I need to have an accurate profile of the object for downstream analysis so a bounding box is not an option. My camera can produce frames at 30 fps, but I do not need to process that fast, though I do not want to only process 1 a second either. Doing a fast de-noising operation is too slow. My images are 4024x3036 monochrome images. I attached jpeg versions of six shots of my scene. The sample is the small chunk in the center of the two plates in the bottom third of the image. I also attached what I am looking to pull from each frame an irregular polygon that matches the 2d profile of the shape accurately. I will favor accuracy and stability over speed but I would like to process a few frames per second.

I will go capture some representative images or small movie and will post shortly.

Thanks in advance.

Sample Images

The goal

This is a course project question. I am working on this function 'mono' and not sure what I am doing wrong. The formula for sepia is listed as: To simulate a sepia-toned photograph, you darken the green value to int(0.6 * brightness) and blue value to int(0.4 * brightness), producing a reddish-brown tone.

I have used that formula in my code and the error I get in my course check module is that my answer is 76% incorrect. Any advice for me on this? Below is my code so far.

I'm facing an unusual issue where i'm not able to use webview anywhere in my app. It is giving following exception.

I want to run particular scenario from my feature file with the below command.

mvn test -Dcucumber.options="--tags @Smoke-Login"

I need to put on the screen, in the simplest way possible, an image buffer in the form of a byte[] where bytes 0-3 are the RGBA using RGB in this case so bytes 0-2 of one pixel, and so on. I can't figure out how to do this, and the only information I could find is on loading the image from a file -- totally not something I want to potentially be doing 60 times per second!

So, how can I do this?

EDIT: Adding some very much needed background.

I am creating my own 2D graphics library, which may seem redundant, but I'm doing this because I feel the Graphics2D API is unsuitable for some applications (and not easily extendable as far as I can tell), especially the game project I am writing this library for.

The basic element of this library is my Canvas class which serves as the thing which my Drawable objects will be rendered onto. It stores its data, depending on which variant is being used, in either an RGB, RGBA or monochrome formatted array of bytes. I chose this method because I believe it allows for some much faster rendering operations. (Each Drawable must have a method which takes a Canvas and renders the object onto it, and this process can include directly writing to the buffer.)

What I'm trying to do in the game is to take those finished Canvas frames and put them onto a JFrame or something like that.

I am using Maven SureFire, TestNG (extending AbstractTestNGCucumberTests) and Cucumber and have several feature files which each have several scenarios. I want to be able to run each scenario in a feature file in parallel but only one feature file at a time. Is this possible?

So to give an example: