Category "numpy"

Creating a Linear Gradient Mask using opencv or

I am trying to stitch images together right now to create panoramas. The approach that I have tried so far was to warp the first image and align the second imag

How to generate a matrix with circle of ones in numpy/scipy

There are some signal generation helper functions in python's scipy, but these are only for 1 dimensional signal. I want to generate a 2-D ideal bandpass filte

Scikit Learn SVC decision_function and predict

I'm trying to understand the relationship between decision_function and predict, which are instance methods of SVC (http://scikit-learn.org/stable/modules/gene

Can numpy bincount work with 2D arrays?

I am seeing behaviour with numpy bincount that I cannot make sense of. I want to bin the values in a 2D array in a row-wise manner and see the behaviour below.

Exception thrown in PyCharm debug mode but not in run mode (seaborn, matplotlib)

I'm using PyCharm 2021.2.3 Community Edition Python interpreter 3.10.0 matplotlib 3.5.0 seaborn 0.11.2 numpy 1.21.4 pandas 1.3.4 PySimpleGUI 4.55.1 When I run t

python(or numpy) equivalent of match in R

Is there any easy way in python to accomplish what the match function does in R? what match in R does is that it returns a vector of the positions of (first) m

Use numpy.load on file within zipfile

I have a zipfile which contains many npy files (file1.npy, file2.npy, file3.npy, ...). I would like to load them individually without extracting the zipfile on

How can I map True/False to 1/0 in a Pandas DataFrame?

I have a column in python pandas DataFrame that has boolean True/False values, but for further calculations I need 1/0 representation. Is there a quick pandas/n

Quick way to access first element in Numpy array with arbitrary number of dimensions?

I have a function that I want to have quickly access the first (aka zeroth) element of a given Numpy array, which itself might have any number of dimensions. W

A way to get the local minima and maxima of a vector

I've been trying to retrieve the extrema of a vector that looks like this : [![First case][1]][1](source: noelshack.com) or like this : [![Second case][2]][2](s

NumPy fancy indexing with provided output array

I have a two-dimensional array and index it with a pair of arrays (in fact my arrays are much larger, millions of elements): a = np.array([[1, 2, 3], [4, 5, 6]

I m trying to convert the pixels which is painted black to another color but ı got an error l

import cv2 import numpy as np image = cv2.imread('images1.png') ss=[] for x in range (0,260,1): for y in range(0,190,1): if image[y,x]==[0,0,0]

I m trying to convert the pixels which is painted black to another color but ı got an error l

import cv2 import numpy as np image = cv2.imread('images1.png') ss=[] for x in range (0,260,1): for y in range(0,190,1): if image[y,x]==[0,0,0]

I m trying to convert the pixels which is painted black to another color but ı got an error l

import cv2 import numpy as np image = cv2.imread('images1.png') ss=[] for x in range (0,260,1): for y in range(0,190,1): if image[y,x]==[0,0,0]

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