All Questions
3,070
questions
0
votes
0
answers
40
views
How can I build my Flutter app to use Python for OpenCV and Numpy? [closed]
I'm developing a Flutter app for iOS that requires image processing using Python, specifically with OpenCV and NumPy. I'm facing several challenges and would appreciate guidance on the best approach:
...
-2
votes
1
answer
41
views
I'm getting an "src is not a numerical tuple" for an opencv program I'm developing that works in their official documentation but not for me [closed]
I'm creating a python program and trying to get feed from a camera and then perform a fourier transform on it to see its spectrum. I've been trying to initialize the camera with cv2.imread() but for ...
-3
votes
0
answers
76
views
What's the best/most robust way to check if 2 images are the same or very similar
I have some video recording of my screen where I am drawing some diagrams, but there are a lot of moments where the screen is idle. Because I am using Camtasia, the cursor is not saved directly on the ...
- 326k
0
votes
1
answer
36
views
centering an image or object in an image using numpy arrays and whatnot
from PIL import Image
import numpy as np
import matplotlib.pyplot as plt
img = Image.open("image.png")
pixels = list(img.getdata())
pxl_array = np.array(pixels)
print(len(pxl_array))
...
0
votes
0
answers
41
views
Does the Intensity of color in OpenCV image matter?
Here is a simple code which puts a text value onto a black frame and displays it:
frame = np.zeros((50,200,3))
org=(0,45)
font=cv2.FONT_HERSHEY_SIMPLEX
fontScale=1
fontColor=(1,0,0) ##rgb
out_img =...
- 1,161
-1
votes
1
answer
33
views
How to Apply ColorMap with OpenCV?
Description
I am trying to convert a numpy array and then, apply a color map to a 2d numpy array that's filled with float values between 0 - 1. I have written this piece of code for that:
for i in ...
- 33
3
votes
1
answer
132
views
How to properly calculate PSD plot (Power Spectrum Density Plot) for images in order to remove periodic noise?
Im trying to remove periodic noise from an image using PSDP, I had some success, but Im not sure if what Im doing is 100% correct.
This is basically a kind of follow up to this video lecture which ...
- 25.5k
8
votes
3
answers
20k
views
A module that was compiled using NumPy 1.x cannot be run in NumPy 2.0.0 as it may crash [duplicate]
Traceback (most recent call last): File "C:\Users\mohit\OneDrive\Desktop\Front End\Flask\pythonProject1\tut2.py", line 8, in <module>
import imutils
File "C:\Users\mohit\...
- 97
0
votes
1
answer
36
views
How do I write the X and Y coordinates from the contours array into separate arrays?
I have an image that has a stain on it. I have found the coordinates of the center of the spot and would like to find all the coordinates of the border of the spot. In the future, I need these ...
0
votes
1
answer
90
views
Center an image and adding a background at export
I want to automate all of this:
Select an object in an image
Crop my image on this object
Crop to 1:1 aspect ratio, leaving a slight gap around this object
Export my image in JPG format in 800x800px ...
- 1
1
vote
2
answers
93
views
How to save the Fourier transform of an image such that I can modify it in an image editor?
I have a noisy image with a particular pattern and I want to remove the pattern. I save the FFT magnitude to a tiff image and the phases to a np.array text file.
I have this python code that computes ...
1
vote
1
answer
55
views
Multiprocessing manager can't pickle <class 'cv2.Mat'>
I made a multi-process program to analyze images from a camera. The first process constantly reads the image from the camera, the second analyzes this image, the third contains an HTTP server for ...
0
votes
0
answers
28
views
reduce or remove salt and pepper or noise from manga text segmentation
is there any algorithm that can reduce remove salt and pepper or noise without damaging the text segmentation on this case like using Morphological , blur method or fastNlMeansDenoising?
for example ...
- 19
2
votes
3
answers
164
views
Draw a outline mask based on image shape - Using Canny edge - updated
I would like to draw an outline mask (shape) based on the image shape.
I am using opencv-python version 4.9.0.80.
So when we have an images like these.
We want output like this without images inside. ...
- 3,176
0
votes
2
answers
67
views
Can't seem to recreate Gaussian blur using Numpy
I want to implement Gaussian Blur (similar to cv2.GaussianBlur) using only Numpy but I can't seem to understand how to tackle the alpha channel. My code:
# 1D Gaussian PD Function
def gauss(x, sigma):
...
- 15