I drew two contour plots, one by matplotlib and the other by plotly. I want to add more contour lines to the plot. In the case of matplotlib, there was no poblem. But regarding to plotly, I have no...

I'm trying to detect and fine-locate some objects in images from contours. The contours that I get often include some noise (maybe form the background, I don't know). The objects should look simila...

I have data in X, Y, Z format where all are 1D arrays, and Z is the amplitude of the measurement at coordinate (X,Y). I'd like to show this data as a contour or 'imshow' plot where the contours/col...

Is there a way to specify the position of the labels on lines of a contour plot - rather than the default or using 'manual' (I have many plots and doing each manually won't help)? I'd like the labe...

I have hundreds of PNG images for which I have to generate corresponding B&W images that show the outer outline of the object. The source PNG image has alpha channel, so the "no object" parts o...

I'm new to python and Opencv. I'm working on a project to build an app to recognize handwritings in local language. One of the critical part of it to find the order of the words and character...

I have a data set as follows (in Python): import numpy as np A = np.array([0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0, 0.1, 0.2, 0.3, 0.4, 0.2, 0.2, 0.05, 0.1]) B = np.array([0.9, 0.7, 0.5, 0....

I have a 2d map of a coordinate transform. The data at each point is the aximuthal angle in the original coordinate system, which goes from 0 to 360. I'm trying to use pyplot.contour to plot lines ...

I have a masked array which is used by matplotlib.plt.contourf to project a temperature contour on a glabal map. I was trying to smooth the contour, but unfortunately none of the proposed solutions...

I have found the following code on this website: import os import os.path import cv2 import glob import imutils CAPTCHA_IMAGE_FOLDER = "generated_captcha_images" OUTPUT_FOLDER = "extracted_letter_...

As the title indicates I would like to make a contour plot by using three 1D arrays. Let's say that x = np.array([1,2,3]) and y = np.array([1,2,3]) and z = np.array([20,21,45]) To do a co...

I am plotting data as described in a previous Stackoverflow question: gnuplot 2D polar plot with heatmap from 3D dataset - possible? Mostly it is working well for me, and I am down to some small de...

I am creating contour plots of different subsets of my data using ggplot2 stat_contour_filled function. However, for each it produces different color scales, which makes it hard to compare them. I ...

I am trying to make a contour plot of my 2d data. However, I would like to input the contours manually. I found the "levels" option in seaborn.kde documentation, where I can define the le...

I have the following image which has car and empty parking slots capture by drone. I would like detect the empty park space and draw a box as such it look like the expected image. Here is my code...

I am trying to sort contours based on their arrivals, left-to-right and top-to-bottom just like how you write anything. From, top and left and then whichever comes accordingly. This is what a...

I have the following code: import numpy as np import matplotlib.pyplot as plt x = np.linspace(-np.pi/2, np.pi/2, 30) y = np.linspace(-np.pi/2, np.pi/2, 30) x,y = np.meshgrid(x,y) z = np.sin(x**2+...

I want to visualize polygonal curve(s) extracted with cv2.approxPolyDP(). Here's the image I am using: My code attempts to isolate the main island and define and plot the contour approximation a...

I'm finding the contours for an image with digits and characters, for OCR. So, I need the contours to be sorted left to right, while going line to line, i.e. top to bottom. Right now, the contours ...

I am trying to detect playing cards and transform them to get a bird's eye view of the card using python opencv. My code works fine for simple cases but I didn't stop at the simple cases and want t...

I am working on a personal project where I detect rectangles (all the same dimensions) and then place those rectangles inside a list in the same order (top-bottom) and then process the information ...

VI have a set of contour points drawn on an image which is stored as a 2D numpy array. The contours are represented by 2 numpy arrays of float values for x and y coordinates each. These coordinates...

I'm trying to match a slightly irregular shape to a database of shapes. For example, here the contour I'm trying to match: For more information, this is an outline of an HDMI connector, represen...

I am using opencvs findContour to find the points to describe an image made up of lines (not polygons) as such: cv::findContours(src, contours, hierarchy, cv::RETR_EXTERNAL, cv::CHAIN_APPROX_SIMPLE...

I'm currently trying to figure out how to detect a text paragraph on an image in order to remove it. I get an input image, which is similar to the image given above. From there on I want to dete...