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OpenCV: Break up single pixel bridges between components


OpenCV: Break up single pixel bridges between components

By : user2185062
Date : November 20 2020, 04:01 AM
This might help you So, this was a bit tricky to achieve, especially the more severe image, but in my experience when working with such pixelated images, unsharp mask always helps. So this is what I tried:
code :
import numpy as np
import cv2

image = cv2.imread("U:/SO/cca.png")
imgray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
# Unsharp mask here
gaussian = cv2.GaussianBlur(imgray, (7, 7), 10.0)
unsharp_image = cv2.addWeighted(imgray, 2.5, gaussian, -1.5, 0, imgray)
cv2.imwrite("cca_2_unsharp.jpg", unsharp_image)

unsharp_image = cv2.erode(unsharp_image, np.ones((3,3), np.uint8), iterations=1)

ret,thresh = cv2.threshold(unsharp_image, 127, 255, cv2.THRESH_BINARY + 
cv2.THRESH_OTSU)
cv2.imwrite("cca_2_thresh.jpg", thresh)

connectivity = 4
num_labels, labels, stats, centroids = cv2.connectedComponentsWithStats(thresh, 
connectivity, cv2.CV_32S)


# Map component labels to hue val
label_hue = np.uint8(179 * labels / np.max(labels))
blank_ch = 255 * np.ones_like(label_hue)
labeled_img = cv2.merge([label_hue, blank_ch, blank_ch])

# cvt to BGR for display
labeled_img = cv2.cvtColor(labeled_img, cv2.COLOR_HSV2BGR)
cv2.imwrite("cca_2_res.jpg", labeled_img)


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OpenCV: Searching for pixels along single-pixel branches

OpenCV: Searching for pixels along single-pixel branches


By : Ali Shah Saber
Date : March 29 2020, 07:55 AM
wish helps you I don't know if you could apply it in your case but you should take a look at cv::findContour. you will get a vector of points ordered.
http://docs.opencv.org/doc/tutorials/imgproc/shapedescriptors/find_contours/find_contours.html
A single Regex Match Entire String first to then break up into multiple components

A single Regex Match Entire String first to then break up into multiple components


By : Nitin
Date : March 29 2020, 07:55 AM
I wish this help you Something like this should work:
code :
(\D+)([\d.]+)(\D+)([\d.]+)(.*)
How is PCI segment(domain) related to multiple Host Bridges(or Root Bridges)?

How is PCI segment(domain) related to multiple Host Bridges(or Root Bridges)?


By : Yahui
Date : March 29 2020, 07:55 AM
Given a stereo disparity map in OpenCV, how do I find true pixel offsets between left and right images (per-pixel)?

Given a stereo disparity map in OpenCV, how do I find true pixel offsets between left and right images (per-pixel)?


By : ghstarks
Date : March 29 2020, 07:55 AM
hope this fix your issue I had the same problem and this is how I fixed it:
Your actual (raw) disparity is what the StereoSGBM class gives as output. You scale it only so that you can see it in an image format.
Getting single pixel line contours of jigsaw with OpenCV

Getting single pixel line contours of jigsaw with OpenCV


By : Charles Bahena
Date : March 29 2020, 07:55 AM
With these it helps I'm trying to automatically extract the contour of all the puzzle pieces from a photo of a puzzle. Here's the grayscale input image: , You can do the following:
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