1,925 questions
0
votes
0
answers
14
views
Image quality not reducing when I try to implement the given Mean structural similarity best-case/worst-case validation model in a paper
Im currently trying to implement the mathematical models in the paper " Image Quality Assessment: From Error Visibility to Structural Similarity" by Zhou Wang.
At section IV.A the author ...
- 35
3
votes
2
answers
137
views
With Python, how to apply vector operations to a neighborhood in an n-D image?
I have a 3D image with vector components (i.e., a mapping from R3 to R3). My goal is to replace each vector with the vector of maximum norm within its 3x3x3 neighborhood.
This task is proving to be ...
- 56k
0
votes
2
answers
511
views
How to solve this ERROR: Could not find a version that satisfies the requirement torch==1.6.0?
I'm using a demo on Colab notebook called Deep Exemplar Based Video Colorization. https://colab.research.google.com/drive/1Y1XTlTdUG-2LzrH1Vnr_osg9BQavfYsz?usp=sharing
Worked swimmingly for four years ...
2
votes
1
answer
103
views
multiprocess with joblib and skimage: PicklingError: Could not pickle the task to send it to the workers
I'm trying to parallelize the task of finding minimum cost paths through a raster cost surface, but I keep bumping into the same PicklingError: Could not pickle the task to send it to the workers.
...
- 79
0
votes
1
answer
41
views
Python skimage: Turning grayscale image array into float makes the image use color instead of grayscale
When using the skimage.io module in python to read an image in grayscale, it works as intended. However, doing anything to the numpy array holding the values which results in them changing to float ...
0
votes
0
answers
54
views
Saving region properties from skimage.measure to a pickle file raises RecursionError: maximum recursion depth exceeded
In my analysis code, I am performing some image properties analysis using skimage.measure.regionprops.
In order to save processing time, I would like to save the region properties to a file and I was ...
- 313
0
votes
0
answers
23
views
Import skimage.draw error when training MRCNN model
I'm new to this and I'm trying to implement a MRCNN model using these resources:
https://github.com/soumyaiitkgp/Custom_MaskRCNN/tree/master
https://engineering.matterport.com/splash-of-color-instance-...
0
votes
0
answers
88
views
Adjoint of the Radon transform by non-filtered backprojection in scikit-image
The function iradon of scikit-image implements the filtered backprojection of the Radon transform. By setting filter_name = None one get an unfiltered backprojection. I was expecting that this will be ...
- 101
0
votes
1
answer
99
views
How to remove burrs after extracting the image skeleton?
I have a binary image, and I used the skeleton method in the Skimage library to extract skeleton lines. However, there are many burrs on both edges, and I want to remove and delete these burrs.
This ...
- 3
0
votes
1
answer
388
views
problem installing pip install scikit-image==0.21.0
I'm getting an error when trying to install scikit-image on win11 x64. I have installed VS build tools and I'm running Python 3.10.0 (needs to be this version).
C:\Rope>pip install scikit-image==0....
2
votes
1
answer
58
views
What does the skimage.measure.find_contours method return?
I have a CSV file containing geometric data of the point type. I would like to obtain the contour lines for this terrain model. The algorithm works well to give me a result, but I don't understand the ...
- 21
-1
votes
1
answer
116
views
Problem in extracting human silhouettes from a segmented image (felzenszwalb)
I am currently working on extracting binary silhouette of people in an image in the publicly available UT interaction dataset. I have applied felzenszwalb's segmentation on the image to divide the ...
2
votes
0
answers
52
views
Is scikit-image resize() affected by the bit depth of the image?
I'm trying to preprocess some data for a computer vision project, and I've been doing so by resizing all the images in a directory. Before flattening them and creating a numpy array containing said ...
- 55
0
votes
1
answer
86
views
compare numpy array against list of values
I would like to have your help about a problem I have with a numpy array.
In my code I have a huge array made of integers, this is the result of a skimage labelling process.
The idea is that I want to ...
- 313
-1
votes
1
answer
128
views
Fitting outer edge of a rough rectangle with rounded corners
I have detected edges of an image with openCV (shown with green points) as
edges = cv2.Canny(gray, canny_0, canny_1)
kernel = np.ones((int(kernel_size), int(kernel_size)), np.uint8)
...
- 651
0
votes
1
answer
106
views
UserWarning: Low image data range; displaying image with stretched contrast
My code:
import numpy as np
# import matplotlib.pyplot as plt
from skimage.io import imshow
array_1 = np.array([[255,0],[0,255]])
imshow(array_1, cmap = 'gray')
Output I get:
UserWarning: Low image ...
- 1
0
votes
0
answers
54
views
iradon and iradonsart function in scikit-image package
i'm trying to do a PET experiment in my university lab. I'm using the iradon and iradonsart function from the scikit package to reconstruct the position of my point like source. My problem is that the ...
1
vote
0
answers
91
views
Use Sauvola for a already binarized image
I want to use Sauvola for multiple iteration of the same image with different parameters. However, it doesn't work, because the image doesn't change at all in the second binarization, as seen in the ...
- 11
0
votes
0
answers
103
views
Contour detection with dicom imaging
I am currently working on image segmentation on dicom files, and I will have to distinguish between areas of the image, but due to the image noise, its hard to find the big faint square.
this is the ...
1
vote
1
answer
114
views
Finding faces with skimage.measure.marching_cubes returns in weird offset based on meshgrid limits
A collegue of mine recently tried to visualise strain moduli using matplotlib. If you do not know what that is: Here's a link if you are interested. https://www.degruyter.com/document/doi/10.1524/zkri....
- 434
1
vote
0
answers
73
views
Saving tensorflow dataset extremely slow after applying filter
Relatively new to tensorflow here, and I am facing an issue where I have not yet managed to find a good answer through searching. So here goes:
I am trying to understand why applying a filter function ...
- 502
-2
votes
2
answers
104
views
Geopandas Swirl like in Scikit-image?
I am wondering if there is a way to transform a geopandas dataframe similar to what Scikit-image does with Swirl?
Edit:
Thanks again, @Timeless and all, my head is swirling. I am making progress, but ...
- 100
0
votes
1
answer
40
views
Connecting find_contours at the edge of an Image
Trying to use this code:
https://scikit-image.org/docs/stable/auto_examples/segmentation/plot_regionprops.html
Problem is if the object falls off the image, that it doesnt close the contour to the ...
- 79
1
vote
1
answer
75
views
How do I fill in the Circles detected using Hough transform?
using edge detection
using hough detection
I'm using Hough circle detection to detect a circle over a binary optic cup region.
Using the code below, I can fill in the circle but the lines of canny ...
- 11
0
votes
0
answers
7
views
Error processing image dataset\train\image\ff8bf1417c.png: No skimage.transform attribute extract_patches --
patches = transform.extract_patches(image, patch_size=(patch_size, patch_size))
patches = patches.reshape(-1, patch_size * patch_size)
this is my code wher e i am getting errorr(Error processing image ...
- 11
0
votes
0
answers
59
views
Find Gradient Magnitude using skimage.feature.hog module
I am trying to print total gradient magnitude for 100 in the below array
img=[[150,50,121],[12,100,25],[201,243,244]]
Below is the code I tried
from skimage.feature import hog
from skimage import ...
- 1,029
0
votes
0
answers
13
views
Problem while measuring with regionprops for the first index in the interaction
enter image description here
Hi, guys.
So I'm trying to get measurements for each object/region in the above image. But, for the first region, I'm not achieving this result.
I'm using the following ...
0
votes
1
answer
64
views
How to fill the area for segmentation using fill_holes function?
I want to track the change of gray scale of segmented areas over time. Why the ndi.binary_fill_holes function did not make a lot of difference?
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
sigma = 3
...
- 7
0
votes
0
answers
84
views
What is the difference of converting to gray using different approaches or libraries?
The context here is that I am writing a code that combines multiple image pre-processing techniques, including converting images into grayscale (luminescence) images, to be applied on some arbitrary ...
- 1
0
votes
1
answer
97
views
Python: ski.transform.warp from scikit-image library does not work as expected
I have recently started playing with some image processing and am relatively new to the field.
I am at a lost as to why I get unexpected results when using the following code from the python scikit-...
- 21
0
votes
1
answer
93
views
What is the difference between skimage view_as_window and sklearn extract_patch_2d, in the context of extracting array of patches from an image?
I have an array of 2D images; an array of [n x w x h], n being the number of images. I want to extract patches from each 2D image. A 2D image would not be divided equally by the patch size (meaning I ...
- 164
1
vote
2
answers
460
views
Extracting the (size of the grid)features from an image
I am working with a image
Actualimage:
I have used techniques like Canny, Hough transform to detect the line, and got this
Output:
Now I would like to extract the features like thickness size on ...
- 15
0
votes
1
answer
72
views
Circle the segmented image to the original
I am new to Python.
I have read this (How to overlay segmented image on top of main image in python) but unfortunately I cannot get to the desired result for the example provided below. The three ...
- 195
0
votes
1
answer
267
views
How to separate two touching blobs?
I have written the following code in order to detect the blobs based on their HSV values, everything works fine, except that when the two blobs intersect(touch) the are detected as one instead of two. ...
- 314
0
votes
0
answers
9
views
im try to do laplacian_pyramid_blending and im getting a wired out put
def laplacian_pyramid_blending(imageA, imageB, mask):
levels = 6
# Construct Laplacian pyramids for images A and B
la = tuple(pyramid_laplacian(imageA, downscale=levels, preserve_range=True, ...
1
vote
1
answer
45
views
Why does it seem necessary to rotate transformation matrix for mapping coordinates with scikit image?
I have a set of points that are effectively 3 vertices of a 45-45-90 right triangle and some other points, a, that should map to them.
import numpy as np
points = np.array([
( 90, 416),
(398, ...
- 5,354
0
votes
1
answer
93
views
composite score for denoising 1D signal
I am suing different methods such as wavelet(different parameters) , FFT to denoise 1 D single . I using skimage.metrics to evaluate denoising as shown in snippet below. (here signal is original noisy ...
- 1,219
1
vote
3
answers
453
views
How to generate a list of coordinate pairs from a simple image of a line
The task here is to generate a 2D path for a robot which replicates a (hand) drawn line. The line is a simple shape being a curve or squiggle and always has one start and one end point. An example of ...
- 19
0
votes
1
answer
97
views
What's the difference between skimage morphology's h_maxima and peak_local_max?
I am trying to understand the difference between the h_maxima and peak_local_max methods.
They both search for the same thing but use different approaches, right? If so, what criterion should be used ...
- 113
-1
votes
1
answer
148
views
errors In scikit-image metrics on 1D array
I am trying to explore different skimage metrics on 1D array . I have two array noisy signal and clean signal. Code snippet is given below .
import numpy as np
import skimage.metrics as M
...
- 1,219
0
votes
1
answer
98
views
Issue about the number of superpixel result returned by skimage.segmentation.slic function
Why the number of superpixel result returned by skimage.segmentation.slic function is not equal to parameter n_segments. The API says that n_segments: The (approximate) number of labels in the ...
0
votes
0
answers
125
views
Finding matching points between an image and a template using skimage ssim
I have a python code that takes a black and white image and a black and white template as input and aims to find the template within the image. Before having to update the skimage library to version 0....
- 1
0
votes
1
answer
331
views
Inverse Radon Transform in Python
I am trying to build a code in Python that does image processing, but I am stuck in a part where I have to do an Inverse Radon Transform. I am using the standard iradon() function in Python.
When I ...
- 13
0
votes
1
answer
65
views
scikit-image RAG mergine leaves black areas
Following this example on the scikit-image homepage, in my example the image has some black areas after merging the RAG in case the threshold is set too high. From the documentation I understand that &...
- 2,746
1
vote
1
answer
238
views
Multi-region image segmentation based on pixel intensities
I am attempting to segment a grayscale image into three regions based on its pixel intensities. Due to illumination and specks, this task turns out to be more challenging than I expected...
Here is ...
- 318
1
vote
0
answers
73
views
Implementing MInError automatic thresholding using skimage.filters.threshold_minimum
I’m using ImageJ to create masks of fluorescence images (.czi files) in the following way:
gaussian blur > thresholding > noise-remove outliers
I want to implement this process in python for ...
0
votes
1
answer
140
views
How to display a legend when using label2rgb from scikit-image
I have an image, a label image and a dictionary that maps label ids to names:
lbl = skimage.io.imread(os.path.join(traindir, "train_lbl_120_14.png"))
img = skimage.io.imread(os.path.join(...
- 824
1
vote
1
answer
283
views
Quantization of an RGB image
I'm doing for a university project a "cartoon-like" filter for an RGB image, so I'm trying to do something to quantize the image.
The only libraries I can use are numpy, matplotlib.pyplot ...
- 19
0
votes
1
answer
166
views
Watershed Algorithm
I try to use the "Watershed" algorithm to segment the skull and tumor.
Here is the my code:
import numpy as np
import matplotlib.pyplot as plt
from skimage import io, filters, color
from ...
-1
votes
1
answer
221
views
Gradients and Laplacian of an image using skimage vs. open-cv
I compare the vertical and horizontal gradients and Laplacian of an image using skimage and cv2 with the following code:
import sys
import matplotlib.pyplot as plt
from matplotlib.image import imread
...
- 306