How do I reliably classify colours as red, yellow, or "other" colours in OpenCV? Question: I have an input image from which I extracted the circles for a robotics project, and then got the average colour within those circles. The circles can either have a red or yellow colour as that is how I painted …
How to get varying shades of red colour based on an input value in python? Question: In python, how can I get varying shades of the red/yellow colour based on an input value between -1 and 1? If the value is between -1 and 0, the function should return yellow colour. If the value is …
How to compare against and modify values of NumPy array Question: I am trying to convert a numpy array to a .vox file. .vox files have a limit where they can only store 255 unique colors. My numpy array is being somewhat randomly generated, so it’s length and values are not always the same. However, …
Color property of plotly bar charts not working for me Question: Hy i’m trying to generate a Chart using plotly express and i just can’t get my head around how to apply the correct colours to the bar. (i need a specific color for 1 bar ) End result wanted So far i have a …
Plotly Dash change networkx node colours in based on user input? Question: After creating the minimal working example below, I tried to change the color of the nodes in the graphs based on user input. Specifically, I have n lists of colors (one color per node), and I would like the user to be able …
subprocess stdout without colors Question: I am running a command line tool that returns a coloured output (similar to ls –color). I run this tool via subprocess: process = subprocess.run([‘ls –color’], shell=True, stdout=subprocess.PIPE) process.stdout.decode() But the result is, of course, with the color instructions like x1b[mx1b[m which makes further processing of the output impossible. How …
How to show different colors on a plot for values from different columns Question: Please consider the small dataframe test: import pandas as pd import matplotlib.pyplot as plt df = pd.DataFrame( [ [1, 1.0, 0.0, 0.0], [1, 0.75, 0.25, 0.0], [1, 0.576, 0.396, 0.028] ], columns = ["State", "1", "2", "3"] ) I am now …
how to accelerate the numpy for-loop, for coloring point-cloud by its intensity Question: enter code hereI want to color a point-cloud by its intensity. currently I use the following for-loop to apply a colormap function to the intensity(4th-dim) of points: import numpy as np points = np.random.random([128*1200,4]) points_colors = np.zeros([points.shape[0], 3]) for idx, p_c in …
Detect almost grayscale image with Python Question: Inspired by this question and this answer (which isn’t very solid) I realized that I often find myself converting to grayscale a color image that is almost grayscale (usually a color scan from a grayscale original). So I wrote a function meant to measure a kind of distance …
How to detect background color on hover Python? Question: Does anyone know, how you can detect the color on which you’re hovering with your cursor with python and returning the color to a string? Asked By: YeagerCS || Source Answers: Solution for Windows: def get_cursor_color(): # Get the cursor position pt = ctypes.wintypes.POINT() ctypes.windll.user32.GetCursorPos(ctypes.byref(pt)) # …
