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Draw a triangle with centroid using OpenCV - GeeksforGeek

It will create a triangle on the black window. Find the centroid of the triangle using the following simple formula. Draw this centroid on the black window using circle function of OpenCV with zero thickness. Below is the implementation of the above approach: import numpy as np. import cv2 (w, h), baseline = cv2.getTextSize(text, fontface, fontscale, thickness) print(fsize: ({w}, {h}), baseline: {baseline}) # 文字を囲む矩形を描画する。 cv2.rectangle(img, (x, y - h), (x + w, y + baseline), (0, 0, 255), thickness) # ベースライン

# Get mask by filling triangle mask = np.zeros((r2[3], r2[2], 3), dtype = np.float32) cv2.fillConvexPoly(mask, np.int32(tri2Cropped), (1.0, 1.0, 1.0), 16, 0); # Apply mask to cropped region img2Cropped = img2Cropped * mask # Cop OpenCV-Python is a library of Python bindings designed to solve computer vision problems. cv2.rectangle () method is used to draw a rectangle on any image. Syntax: cv2.rectangle (image, start_point, end_point, color, thickness このうち、cv2.threshold () を使った2値化のやり方を以下で紹介します。 cv2.threshold () cv2.threshold () では、ある1つの閾値を決めて、2値化を行います。 ret, dst = cv2.threshold (src, dst, threshold, maxValue, thresholdType

OpenCV - 長方形、円、線、ポリゴンなどを描画する方法 - pystyl

# loop over the contours for c in cnts: # compute the center of the contour, then detect the name of the # shape using only the contour M = cv2.moments(c) cX = int((M[m10] / M[m00]) * ratio) cY = int((M[m01] / M[m00]) * rati Cropping an triangle from captured frame - キャプチャされたフレームから三角形を切り取る:OpenCVおよびC ++ c++ - opencvを使用した三角形マスク OpenCv Pythonで画像のサイズを変更し、スペースを色で塗りつぶします python - 三 文字の描画 putText関数で画像・文字列・座標・フォント・サイズ・色を指定することで文字を描画できます。フォントには以下のような種類があります。 import numpy as np import cv2 img = np.zeros((500, 700, 3), np.uint8) cv2. トライアングルアルゴリズムです。. import cv2 im = cv2.imread('original.png', cv2.IMREAD_GRAYSCALE) retval, dst = cv2.threshold(im, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_TRIANGLE) print(retval) cv2.imwrite('result.png', dst) 232.0. 濃淡がはっきりしている画像の場合は、大津の方法の方が良さそうですね。 cv2.drawMarker(img_shape, ce, (0,0,255), markerType=cv2.MARKER_CROSS, markerSize=10, thickness=1, line_type=cv2.LINE_AA) # 最小外接三角形 retval, triangle = cv2.minEnclosingTriangle(cnt) tr = triangle.astype(n

Warp one triangle to another using OpenCV ( C++ / Python

  1. The cv::drawMarker function draws the wrong shape for the cv::MARKER_TRIANGLE_UP marker. Here is an example using OpenCV 3.1.0 Python bindings (of course the same happens from C++): import numpy as np import cv2
  2. 描画関数 描画関数は,任意のビット深度を持つ行列または画像に対して動作します. 描画される形状の境界は,アンチエイリアス処理されます(今のところ,8ビット画像に対してのみ実装されています). すべての関数の引数は,カラー画像の場合には RGB 値で表現された色(これは CV_RGB.
  3. 方法は単純です.あるがその画素値がしきい値より大きければある値 (白)を割り当て,そうでなければ別の値 (黒)を割り当てます.関数は cv2.threshold を使います.第1引数は入力画像で グレースケール画像でなければいけません .第2引数はしきい値で,画素値を識別するために使われます.第3引数は最大値でしきい値以上 (指定するフラグ次第では以下)の値を.
  4. cv2.fillConvexPoly(img, triangle, (255, 255, 255)) plt.imshow(img) plt.show() cv2.fillPoly() cv2.fillPoly()函数可以用来填充任意形状的图型.可以用来绘制多边形,工作中也经常使用非常多个边来近似的画一条曲线.cv2.fillPoly()函数可以一.

FONT_HERSHEY_DUPLEX # 図形の数の変数 triangle = 0 rectangle = 0 pentagon = 0 oval = 0 circle = 0 # 図形の設定 for cnt in contours: approx = cv2. approxPolyDP (cnt, 0.01 * cv2. arcLength (cnt, True), True) cv2. drawContour Note that cv2.THRESH_OTSU and cv2.THRESH_TRIANGLE only support 8-bit single channel images as of version 4.2.0. An error will occur if a color image (three-dimensional array) is specified. # th, im_th_otsu = cv2.threshold (im, 128, 192, cv2.THRESH_OTSU) # error: OpenCV (4.2.0) /tmp/opencv-20200105-17262-cwpzm4/opencv-4.2 import inspect calibrate = cv2. createCalibrateDebevec print (inspect. getdoc (calibrate. process)) 出力は次のようになります。 process(src, times[, dst]) -> ds

Python OpenCV cv2.rectangle() method - GeeksforGeek

  1. cv2.THRESH_OTSU cv2.THRESH_TRIANGLE Try changing the threshold and max_val to obtain different results. th=80 max_val=255 ret, o1 = cv2.threshold(gray_img_clahe, th, max_val, cv2.THRESH_BINARY) cv2.putText(o1,.
  2. To draw the contours, cv2.drawContours function is used. It can also be used to draw any shape provided you have its boundary points. Its first argument is source image, second argument is the.
  3. BORDER_REFLECT_101) # Use a mask to keep only the triangle pixels # Get mask by filling triangle mask = np. zeros ((dest_rect [3], dest_rect [2], 3), dtype = np. float32) cv2. fillConvexPoly (mask, np. int32 (dest_crop_tri), (1.0
  4. cv2.threshold()函数的作用是将一幅灰度图二值化,基本用法如下: #ret:暂时就认为是设定的thresh阈值,mask:二值化的图像 ret,mask = cv2.threshold(img2gray,175,255,cv2.THRESH_BINARY) plt.imshow(mask,cmap='gray') 上面代码的作用是,将灰度图img2gray中灰度值小于175的点置0,..
  5. 動かしたいコード. import cv2 image = cv2.imread (rC:\library_cv\sky_006.jpg) gray = cv2.cvtcolor (image, cv2.COLOR.BGR2GRAY) cv2.imwrite (rC:\write_cv\gray_006.jpg) 上記のコードに cv2.countNonZero を使って、白の割合を出すのが目標です。. ※画像名は仮想ですが、概ねこの通りです。. python python3 opencv. 共有
  6. 1)cv2.adaptiveThreshold (gray_src, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY, 9, 5) ※gray_srcは、グレースケール画像の入力配列. 簡単な前処理を行うことで、さらに輪郭抽出の精度を向上させることができます。. 例として、ノイズ抑制の効果がある平準化フィルターを使用した場合を紹介いたします。. しきい値を大きくすることで、ノイズ除去の効果が増える一方、画質が.
  7. Adaptive Thresholding In the previous section, we used one global value as a threshold. But this might not be good in all cases, e.g. if an image has different lighting conditions in different areas. In that case, adaptive.

cv2.threshold (img_src, thresh (閾値), 画素値の最大値, 二値化するためのタイプ) [/python] まず二値化するためのタイプとして選択できるのは以下の8種類。. cv2.THRESH_BINARY cv2.THRESH_OTSU cv2.THRESH_TRIANGLE cv2.THRESH_BINARY_INV cv2.THRESH_TOZERO cv2.THRESH_TRUNC cv2.THRESH_MASK cv2.THRESH_TOZERO_INV. 上の全てではないが、一部の画素値と閾値の関係は以下の図の通り。 integral image for squared pixel values; it is (W+1)\times (H+1), double-precision floating-point (64f) array. integral for the image rotated by 45 degrees; it is (W+1)\times (H+1) array with the same data type as sum. desired depth of the integral and the tilted integral images, CV_32S, CV_32F, or CV_64F 1.図形を検出して座標を取得する. opencvの関数で簡単にやってみます。. DetectTriangle.py. Copied! import cv2 import numpy as np def DetectTriangle(img, inputNm, outputNm): image_obj = cv2.imread(inputNm) img = cv2.adaptiveThreshold(img, 255, 1, 1, 11, 2) cv2.imwrite(PointDetect_threshold + outputNm, img) contours, hierarchy = cv2.findContours(img,cv2.RETR_CCOMP,cv2 这个函数是opencv中用于在图像中划线的函数 cv2.line(plot,(0,y),(int(h * mul),y),(255,0,0),w) 第一个参数 img:要划的线所在的图像; 第二个参数 pt1:直线起点 第三个参数 pt2:直线终点 第四个参数 color:直线的颜色 第五个参数 thickness=1:线条粗细 转载..

OpenCV - 画像処理の2値化の仕組みと cv2

The following are 30 code examples for showing how to use cv2.rectangle().These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original projec import cv2 import numpy as np def thresh_triangle (hist): start, end = hist.nonzero()[0][[0,-1]] peak = hist.argmax() if peak - start > end - peak: x1, x2 = start, peak y1, y2 = 0, hist[x2] else: x1, x2 = peak img = np. full ((210, 425, 3), 128, dtype = np. uint8) cv2. line (img, (50, 10), (125, 60), (255, 0, 0)) cv2. line (img, (50, 60), (125, 10), (0, 255, 255), thickness = 4, lineType = cv2 Get approximate polygons approx = cv2.approxPolyDP(cnt,0.01*cv2.arcLength(cnt,True),True) if len(approx)==3: shape_name=Triangle cv2.drawContours(image,[cnt],0,(0,255,0),-1) find contour center to place text at the cente cv2. putText (img, Triangle, (x, y), cv2. FONT_HERSHEY_COMPLEX, 0.5, (0, 0, 0)) elif len (approx) == 4: x1, y1, w, h = cv2. boundingRect (approx) aspectRatio = float (w) / h print (aspectRatio) if aspectRatio >= 0.95 and <= :

OpenCV shape detection - PyImageSearc

Drawing Rectangle ¶. To draw a rectangle, you need top-left corner and bottom-right corner of rectangle. This time we will draw a green rectangle at the top-right corner of image. img = cv2.rectangle(img, (384,0), (510,128), (0,255,0),3 ために、型式をCV2からCV3に変更しました。外形寸法および能力等は、旧型CV2と全く同じです #!/usr/bin/env python #coding: utf-8 import numpy as np import cv2, os, csv, math, re from operator import itemgetter from pylab import show, triplot from matplotlib import pyplot as plt import triangle as tr from matplotlib.patche import cv2 import numpy as np img = cv2. imread ('messi5.jpg') res = cv2. resize (img, None, fx = 2, fy = 2, interpolation = cv2. INTER_CUBIC ) #OR height , width = img . shape [: 2 ] res = cv2 . resize ( img ,( 2 * width , 2 * height ), interpolation = cv2

def find_shape(approx): x, y, w, h = cv2.boundingRect(approx) if len(approx) == 3: s = Triangle elif len(approx) == 4: calculation = w / float(h) if calculation >= 0.95: s = Square else: s = Rectangle elif le In the above code, we first find the rectangle enclosing the text area based on the four points we provide using the cv2.minAreaRect() method. Then in function crop_rect() , we calculate a rotation matrix and rotate the original image around the rectangle center to straighten the rotated rectangle def hist_curve(im): h = np.zeros((300, 256, 3)) if len(im.shape) == 2: color = [(255, 255, 255)] elif im.shape[2] == 3: color = [(255, 0, 0), (0, 255, 0), (0, 0, 255)] for ch, col in enumerate(color): hist_item = cv2

python - opencvでの三角形の塗りつぶし - 初心者向けチュートリア

基本図形の描画1 - 線分・矢印・マーカー・文字【OpenCV

Figure 1. Left : Image of President Obama with landmarks detected using dlib. Center : Delaunay triangulation of the landmarks. Right : Corresponding Voronoi Diagram. In a previous post I had discussed two libraries for facial landmark detection, and had pointed to several interesting applications like Face Morphing, Face Replacement etc. that use facial landmarks import cv2 import numpy as np font = cv2.FONT_HERSHEY_COMPLEX We then load the image, we get the threshold of the image to have a black and white image, where the background is white and all the shapes are black ret, binary = cv.threshold(gray, 0, 255,cv.THRESH_BINARY | cv.THRESH_TRIANGLE) (4)cv.THRESH_OTSU类型和cv.THRESH_TRIANGLE类型 THRESH_OTSU和THRESH_TRIANGLE和前面的说到的二值化方法组合使用, 好处是不用自己指定thresh值 ,系统会进行计算并且作为返回值返回

rectangle = cv2.boundingRect(convexhull) divide_2d = cv2.Subdiv2D(rectangle) divide_2d.insert(landmarks_points) split_triangle = divide_2d.getTriangleList() split_triangle = np.array(split_triangle, dtype=np.int32) cv2.fillConvexPol After that we will create different polygon shapes using cv2.polylines() Then display the image using cv2.imshow() Wait for keyboard button press using cv2.waitKey() Exit window and destroy all windows using Example Code Sapphire Court, Paradise Way, Coventry Walsgrave Triangle, Coventry, West Midlands, CV2 2TX T: 020 7656 2000 View Detail

Paradise Way, Walsgrave Triangle , Coventry, , CV2 2ST, GB mile 52.4370095-1.432515 Route Results Route Results Send To: Email Directions from the Hotel Staff From London Join the M6 from junction 19 of the M1, head. PythonにOpenCVをインポートして画像に線や図を描画する方法学びます。ここでは矩形のrectangle()、円のcircle()、直線のline()、テキストのputText()、 多角形のpolylines()を扱います approxCurve = cv2. approxPolyDP (curve, epsilon, closed) curve : contour/polygon we want to approximate. epsilon : This is the maximum distance between the original curve and its approximation The cv2.waitKey function is used to tell the program how long to display the image for. We passed 0 into the function, meaning it will wait until a key is pressed to close the output window. We passed 0 into the function, meaning it will wait until a key is pressed to close the output window Book direct for lower prices - Located near the Ricoh Arena and 30 min from Birmingham Airport. Visit Coventry Cathedral, the birthplace of William Shakespeare. Kenilworth Castle Birmingham is also just a 30-min drive away

import cv2 import numpy as np import matplotlib.pyplot as plt import ipywidgets as widgets import IPython.display as display from ipywidgets import Layout, Button, Box, Layout, Image, IntSlider, AppLayou Detect face rectangle using cv2.detectMultiScale() Then draw custom lines using cv2.line() Also create ellipse using cv2.ellipse() Display all the images using cv2.imshow() Wait for keyboard button press using cv2.waitKey() at. image_new = cv2. addWeighted (overlay, alpha, image, 1-alpha, 0) This comment has been minimized. Sign in to view Copy link Quote reply shivaraj1994 commented Dec 7, 2018 Thanks a lot man This comment has michelpf.

Pythonで画像を2値化する(OpenCV編) — 某エンジニアのお

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  2. In this article I'm going to explain how to do face swapping using Opencv with Python in 8 simple steps. This is a quick explanation of each step, but I've also done for each of them an entire full tutorial where I show ho
  3. cv2.imshow('image', image) # cv2.imwrite(image_box_text.jpg,image) cv2.waitKey(0) cv2.destroyAllWindows() Hier siehst du die Ausgabe des Bildes mit den erkannten Objekten. Darunter die Klassen-ID in der ersten Spalte, die Wahrscheinlichkeit in der zweiten Spalte und der Klassenname in der dritten Spalte

cv2.THRESH_TRIANGLE Triangle 알고리즘 사용 Result 책이 출간되었습니다! C#과 파이썬을 활용한 OpenCV 4 프로그래밍 컴퓨터 비전 기초 이론부터 머신러닝을 활용한 영상 처리 프로젝트까지 C# OpenCvSharp4 윤대희 저. SAPPHIRE COURT, CV2 2TX, Coventry Walsgrave Triangle, West Midlands Company Number 00758153 Jurisdiction England/Wales Previous Names 04/01/1999 - AAH RETAIL PHARMACY LIMITED Lloydspharmacy Limited.

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OpenCV Python - Rotate Image We can rotate an image using OpenCV to any degree. In this tutorial, we shall learn how to rotate an image to 90, 180 and 270 degrees in OpenCV Python with an example. To rotate an image using OpenCV Python, first calculate the affine matrix that does the affine transformation (linear mapping of pixels), then warp the input image with the affine matrix. Syntax. sift = cv2.SIFT() kps, des = sift.detectAndCompute(img, None) points = [[0, 0], [0, h-1], [w-1, 0], [w-1, h-1]] for kp in kps: points.append([int(kp.pt[0]), int(kp.pt[1])]) Delaunay algorithm can efficiently realized the Delaunay Triangulation and modeling of the points, so it's used to construct the triangle mesh

Video: OpenCVで外接円、四角、三角を取得する - Emotion Explore

[IMGPROC] drawMarker with triangle-up marker type · Issue

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  3. While using cv2.findContour(), we are receiving contours and hierarchy. Actually we got three arrays, first is the image, second is our contours, and one more output which we named as hierarchy. Normally we use the ** function t
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描画関数 — opencv 2

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画像のしきい値処理 — OpenCV-Python Tutorials 1 documentatio

cv2.drawMarker(img, (375, 50), (255, 255, 0), markerType=cv2.MARKER_TRIANGLE_UP, markerSize=10) # 三角形 pts = np.array(((300, 80), (300, 150), (335, 150))) cv2.polylines(img, [pts], True, (255, 255, 255), thickness=2) # ploylinesは折れ First, use the cv2.getGaussianKernel() to create a 1-D kernel. Then use the cv2.sepFilter() to apply these kernels to the input image. import cv2 img = cv2.imread('D:/downloads/opencv_logo.PNG') # Creates a 1-D Gaussian kernel a = cv2.getGaussianKernel(5,1) # Apply the above Gaussian kernel cv2. getPerspectiveTransform, cv2. warpPerspective, ** kwargs) src = cv2. imread ('data/src/lena.jpg') dst = cv2. imread ('data/src/rocket.jpg') src_pts = [[100, 80], [150, 200], [300, 20]] dst_pts = [[280, 120], [320, 300], [400, 150]

Face swapping (explained in 8 steps) - Opencv with Python

shape = unidentified peri = cv2.arcLength(c, True) approx = cv2.approxPolyDP(c, 0.04 * peri, True) # if the shape is a triangle, it will have 3 vertices if len(approx) == 3: shape = triangle # if the shape has 4 vertices, it is either a square or # a rectangle elif len(approx) == 4: Preview: (hide) save. cancel Eden Road, Coventry Walsgrave Triangle, Coventry, CV2 2TB is within the Henley and Longford policing neighbourhood, under the West Midlands Police force area. For non-urgent queries, contact 101999

Walsgrave Triangle Coventry CV2 2TX United Kingdom Tel: 0845 600 3565 Website: www.lloydspharmacy.co.uk Together we are working to drive change that makes a tangible difference for Society, Business and the Individual.. Registered in England and Wales No.: 00123458 Registered Office:Sapphire Court, Walsgrave Triangle, Coventry CV2 2TX VAT Number: 222516987 © 2012 AAH Pharmaceuticals. I need to color the vocal cords area in white(Marked with triangle) and the rest in black, so it will look something like that: i tried to find the contours using that code: import cv2 import numpy as np img = cv2.imread(LPR.png, cv2.IMREAD_GRAYSCALE) _, threshold = cv2.threshold(img, 50, 255, cv2 The cv2.threshold() function can also be applied to multi-channel images. This can be seen in the thresholding_bgr.py script. In this case, the cv2.threshold() function applies the thresholding operation in each of the channels of the BGR image

Convert the image into grayscale for better processing. Detect shapes in the image by selecting a region on the basis of the same colors or intensity levels. Search every region in the image for the desired polygon i.e - 3 for Triangle,4-for square or Rectangle,5 for Pentagon, and so on The cv2.Moments function and the cx and cy variable declarations are best explained in OpenCV's introduction to contours. But simply put, lines n - n just return the coordinates of the center of the contour.. Walsgrave Triangle Coventry, CV2 2ST, United Kingdom 024 7660 3000 @doubletreecoventry Click here to visit the hotel website LEARN MORE ©The Grooming Show 2017 | Designed by The Pet Business Academy. Walsgrave Triangle Coventry CV2 2TX AAH Customer Care Contact Numbers Community Pharmacy - 0344 561 8899 Dispensing Doctors - 0344 561 8899 Hospitals - 0344 561 6699 AAH Customer Systems Service Des

M = cv2.moments(cnt) cx = int(M['m10']/M['m00']) cy = int(M['m01']/M['m00']) Translating the contour by subtracting the center with all the points cnt_norm = cnt — [cx, cy Sapphire Court, Walsgrave Triangle, Coventry, CV2 2TX DORMANT - £401.05 k - 44 Peel Street Pharmacy Limited Sapphire Court, Paradise Way, Walsgrave Triangle, Coventry CV2 2TX DORMANT Upgrade to view £-7.9 m - 45. # finds the circles in the grayscale image using the Hough transform circles = cv2.HoughCircles(image=img, method=cv2.HOUGH_GRADIENT, dp=0.9, minDist=80, param1=110, param2=39, maxRadius=70) In case you're wondering what does these parameters refer to, type help(cv2.HoughCircles) and you'll find a good explanation

cv2.fillConvexPoly()与cv2.fillPoly()填充多边形 - 瘋耔 - 博客

How to create a Binary Mask for medical images - OpenCV QANATOMY LECTURE 2 - StudyBlue

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Detect star shape in opencv-python - Stack OverflowOpenCV Image Segmentation: Tutorial for Extracting

import cv2 import math THRESHOLE_VALUE = 60 COEFFICIENT = 0.02 class ShapeDetector: # 初始化类 def __init__ (self): #字典类型对应每一种图形的计数器 self. counter = { unrecognized image: 0, triangle: 0, : 0, : 0, :. T # Draw the lane onto the warped blank image #plt.plot(left_fitx, ploty, color='yellow') cv2. polylines (color_warp, [pts], False, (0, 255, 0), 10) #cv2.fillPoly(color_warp, np.int_([pts]), (0, 255, 0)) # Warp the blank back to original = Find Garden Services near Paradise Way, CV2, Coventry Walsgrave Triangle, Coventry, get reviews, contact details and submit reviews for your local tradesmen. Request a quote from Garden Services near you today with Yell img = cv2.medianBlur(gray_img,5) => img = cv2.medianBlur(gray_img,25) In general, without blurring, the algorithms tends to extract too many circular features. So, to be more successful, the prepocessing seems to be crucial. Parameters: img - Image. text - Text string to be drawn. org - Bottom-left corner of the text string in the image. font - CvFont structure initialized using InitFont(). fontFace - Font type.One of FONT_HERSHEY_SIMPLEX, FONT_HERSHEY_PLAIN, FONT_HERSHEY_DUPLEX, FONT_HERSHEY_COMPLEX, FONT_HERSHEY_TRIPLEX, FONT_HERSHEY_COMPLEX_SMALL, FONT_HERSHEY_SCRIPT_SIMPLEX, or FONT_HERSHEY_SCRIPT.

Postcode CV2 2TU is an active postcode in England. It serves an area around the location having latitude and longitude of 52.430611, -1.426018 respectively. It is having an altitude of about 81m above sea level. It comes under the district. Address 1. Breakspear Place, Breakspear Park, Hemel Hempstead, Hertfordshire, HP2 4TZ, England. Address 2. Eden Road, Walsgrave Triangle, Coventry, CV2 2TB, England. TEL: +44 (0)2476 842500. DENSO MARSTON, LTD. Main Business: Manufacture and sale of radiators, oil coolers, and inter-coolers Sapphire Court, Walsgrave Triangle, Coventry, CV2 2TX Role Resigned Secretary Appointed on 1 January 2015 Resigned on 4 January 2016 Selsley House, Westhorpe, Sibbertoft, Leicestershire, LE16 9UL Resigned 26 July.

- Mckesson CareersDetección de contornos con OpenCV PythonA/C Compressors - DensoChevron Triangle Tiles: A Stylish Zig-Zag Pattern - ANT
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