093~099 Feature descriptor matching

Author: JimmyHHua

README.md

@@ -129,5 +129,12 @@ code_087 | [Video Analysis-Frame Difference Moving Object Analysis](python/code_
 code_088 | [Video Analysis-Meanshift](python/code_088)   | ✏️
 code_089 | [Video Analysis-CamShift](python/code_089)   | ✏️
 code_090 | [Video Analysis-Object Movement Trajectory Drawing](python/code_090)   | ✔️
-code_090 | [Object Detection-HAAR Cascade Classification ](python/code_091)   | ✔️
-code_090 | [Object Detection-HAAR Feature Analysis](python/code_092)   | ✔️
+code_091 | [Object Detection-HAAR Cascade Classification ](python/code_091)   | ✔️
+code_092 | [Object Detection-HAAR Feature Analysis](python/code_092)   | ✔️
+code_093 | [Object Detection-LBP Feature Analysis](python/code_093/opencv_093.py)   | ✔️
+code_094 | [ORB Feature Critical Point Detection](python/code_094)   | ✏️
+code_095 | [ORB Feature Descriptor Matching](python/code_095)   | ✔️
+code_096 | [Multiple  Descriptor Matching Methods](python/code_096)   | ✏️
+code_097 | [Location of Known Objects Based on Descriptor Matches](python/code_097)   | ✏️
+code_098 | [SIFT Feature Critical Point Detection](python/code_097)   | ✔️
+code_099 | [SIFT Feature Descriptor Matching](python/code_097)   | ✔️

README_CN.md

@@ -128,5 +128,12 @@ code_087 | [视频分析-帧差移动对象分析](python/code_087/opencv_087.py
 code_088 | [视频分析-均值迁移](python/code_088)   | ✏️
 code_089 | [视频分析-连续自适应均值迁移](python/code_089)   | ✏️
 code_090 | [视频分析-对象移动轨迹绘制](python/code_090)   | ✔️
-code_090 | [对象检测-HAAR级联分类器](python/code_091)   | ✔️
-code_090 | [对象检测-HAAR特征分析](python/code_092)   | ✔️
+code_091 | [对象检测-HAAR级联分类器](python/code_091)   | ✔️
+code_092 | [对象检测-HAAR特征分析](python/code_092)   | ✔️
+code_093 | [对象检测-LBP特征分析](python/code_093/opencv_093.py)   | ✔️
+code_094 | [ORB 特征关键点检测](python/code_094)   | ✏️
+code_095 | [ORB 特征描述子匹配](python/code_095)   | ✔️
+code_096 | [多种描述子匹配方法](python/code_096)   | ✏️
+code_097 | [基于描述子匹配的已知对象定位](python/code_097)   | ✏️
+code_098 | [SIFT 特征关键点检测](python/code_097)   | ✔️
+code_099 | [SIFT 特征描述子匹配](python/code_097)   | ✔️

python/code_093/faces_lbp.jpg

@@ -0,0 +1,33 @@
+import cv2 as cv
+
+#capture = cv.VideoCapture(1)
+detector = cv.CascadeClassifier("lbpcascade_frontalface_improved.xml")
+image = cv.imread('people.jpg')
+
+faces = detector.detectMultiScale(image, scaleFactor=1.05, minNeighbors=1,
+                                  minSize=(30, 30), maxSize=(200, 200))
+for x, y, width, height in faces:
+    cv.rectangle(image, (x, y), (x+width, y+height), (0, 0, 255), 2, cv.LINE_8, 0)
+
+cv.imshow("faces", image)
+cv.imwrite("faces_lbp.jpg", image)
+
+c = cv.waitKey(0)
+'''
+while True:
+    ret, image = capture.read()
+    if ret is True:
+        cv.imshow("frame", image)
+        faces = detector.detectMultiScale(image, scaleFactor=1.05, minNeighbors=1,
+                                          minSize=(30, 30), maxSize=(120, 120))
+        for x, y, width, height in faces:
+            cv.rectangle(image, (x, y), (x+width, y+height), (0, 0, 255), 2, cv.LINE_8, 0)
+        cv.imshow("faces", image)
+        c = cv.waitKey(50)
+        if c == 27:
+            break
+    else:
+        break
+'''
+cv.destroyAllWindows()
+

python/code_093/lbpcascade_frontalface_improved.xml

@@ -0,0 +1,2 @@
+#### More Detail, please check the blog of zhihu as below
+✈️ ✈️ ✈️ [OpenCV图像处理- 特征点检测、描述子匹配](https://zhuanlan.zhihu.com/p/74040063)

python/code_093/opencv_093.py

@@ -0,0 +1,15 @@
+import cv2 as cv
+import numpy as np
+
+src = cv.imread("test.jpg")
+cv.namedWindow("input", cv.WINDOW_AUTOSIZE)
+cv.imshow("input", src)
+# 创建orb检测器
+orb = cv.ORB_create()
+kps = orb.detect(src)
+# -1表示随机颜色
+result = cv.drawKeypoints(src, kps, None, -1, cv.DrawMatchesFlags_DEFAULT)
+cv.imshow("result", result)
+cv.imwrite('orb_result.jpg', result)
+cv.waitKey(0)
+cv.destroyAllWindows()