2,792 questions
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32
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How to use contour labelformat in plotly python?
I am trying to adjust labels for level contours. Example is given below. However, while it doesn’t cause any errors, there is no visible change in the labels.
import numpy as np
import plotly....
- 41
1
vote
1
answer
87
views
plt.contour() plots series of lines instead of a contour line
I aim to plot a contour plot of flux, but instead of closed contour curves, plt.contour() returns a series of lines with the same height.
Psi is defined as a np.array and has a 320 by 200 shape.
fig, ...
-3
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0
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29
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2D bounding box of shapes with small gaps between them [closed]
enter image description hereI want to find a code that draws the smallest 2D box containing the placed shapes, and calculates the [black/total area] within this area.
However, the codes I found had ...
0
votes
1
answer
33
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How export z values with shape file
I have successfully created a filled contour map with UTM data from a numpy array and exported to a shape file, but the shape file only has polygons with no other data. The partial code is:
#Convert ...
- 3
-1
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1
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78
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How to measure the length of image from a masked image using OpenCV?
I am new in image processing and I am trying to improve myself by doing some projects and I have a problem about my project. I have an image dataset containing lakes with their corresponding binary ...
- 1,138
1
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1
answer
111
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How to Detect Thick Lines as Single Lines Using Hough Transform in OpenCV
I'm using OpenCV's HoughLinesP function to detect straight lines in an image. When the image contains thin lines, the detection works perfectly. However, when the image contains thick lines, the ...
- 566
0
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0
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21
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Getting values of contour within polygon path
I have the following issue. I have a function of two variables defined on a regular grid via np.meshgrid and I would like to get the coordinates of the points on some contour, within a bounding region ...
- 1
0
votes
1
answer
94
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Drawing a bounding box around the largest contour python CV
I'm struggling to get the bounding box for an identified area in an image. The following code results in this image: https://i.sstatic.net/6HX4dNrB.png. However, as might be obvious from the picture, ...
- 107
0
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1
answer
24
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gnuplot contour stops before reaching border
I have a file with a field (vr-cs) defined between -0 and 30 in x and -30 to 30 in y. You can download the file from here. I'm trying to plot a contour of vr-cs=0 between [0:8][0:3]
set view map
set ...
- 41
0
votes
1
answer
28
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How to display drawdown contours calculated with the Theis equation to display on an interactive map in Dash with Python?
I have created a Dash app using Python with an interactive map using mapbox. I want to generate drawdown contours at 10-ft intervals out to a 1-ft drawdown around a specified lat/lon using the Theis ...
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20
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How to define contour levels is irregular intervals for a contour plot type “level” - Plotly
i have same problem like this thread https://community.plotly.com/t/custom-contour-levels-for-a-contour-plot
The problem is : Is there a definitive way to plot custom contour levels yet? I’m ...
0
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1
answer
41
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selecting a contour from multiple contours of same level
I'm Trying to obtain the contour at a given level, say 23 C from a time vs depth data of temperature. The contour 23 is overlaid onto the figure.
How do I isolate and select one single contour path ...
0
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0
answers
23
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How to create 3D surface with different layers that each have their own colormap in matlab? [duplicate]
How can I create a 3D map of the glacier (bedrock + glacier surface + debris surface) with each a different colormap in Matlab? I tried several things but it does not work. Only 1 colormap is used and ...
- 123
0
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0
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33
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Index Error when Restricting the Levels in ax.clabel
I am trying to put labels on a subset of levels in a contour plot at specific locations. A minimal toy code that reproduces the error is
import numpy as np
import matplotlib.pyplot as plt
...
0
votes
1
answer
113
views
Large contour not found in binary image
I have a binary image (binary_image_full_sizes.png) and I would like to find the large oval contour in the middle. The cv2.findContours() function does not return the contour I’m looking for but when ...
- 17