diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 5f994e23..677247e4 100755
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,7 +1,13 @@
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+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/ch09-图像的基础操作/9.itemset.py" afterPath="$PROJECT_DIR$/ch09-图像的基础操作/9.itemset.py" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/ch09-图像的基础操作/9.shape.py" afterPath="$PROJECT_DIR$/ch09-图像的基础操作/9.shape.py" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/ch11-程序性能检测及优化/11.getTickCount.py" afterPath="$PROJECT_DIR$/ch11-程序性能检测及优化/11.getTickCount.py" />
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@@ -27,6 +33,16 @@
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@@ -37,28 +53,28 @@
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-        <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.getRotationMatrix2D.py">
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-        <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.wrapAffine.py">
+      <file leaf-file-name="13.VideoCapture_blue_object.py" pinned="false" current-in-tab="false">
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-    <entry file="file://$PROJECT_DIR$/ch05-视频/__init__.py">
+    <entry file="file://$PROJECT_DIR$/ch06-OpenCV中的绘图函数/6.draw.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1162,7 +1168,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch06-OpenCV中的绘图函数/6.draw.py">
+    <entry file="file://$PROJECT_DIR$/ch07-把鼠标当画笔/7.draw_circle_rectangle.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1170,7 +1176,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch09-图像的基础操作/9.shape.py">
+    <entry file="file://$PROJECT_DIR$/ch07-把鼠标当画笔/7.MouseCallback.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1178,7 +1184,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch10-图像上的算术运算/10.bitwise_and.py">
+    <entry file="file://$PROJECT_DIR$/ch08-用滑动条做调色板/8.createTrackbar.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1186,7 +1192,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch11-程序性能检测及优化/11.useOptimized.py">
+    <entry file="file://$PROJECT_DIR$/ch08-用滑动条做调色板/8.Trackbar_draw.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1194,15 +1200,31 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch13-颜色空间转换/13.find_object_hsv.py">
+    <entry file="file://$PROJECT_DIR$/ch09-图像的基础操作/9.img_roi.py">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="500">
-          <caret line="26" column="12" lean-forward="false" selection-start-line="26" selection-start-column="12" selection-end-line="26" selection-end-column="12" />
+        <state relative-caret-position="0">
+          <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
           <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.getRotationMatrix2D.py">
+    <entry file="file://$PROJECT_DIR$/ch09-图像的基础操作/9.itemset.py">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="120">
+          <caret line="7" column="25" lean-forward="false" selection-start-line="7" selection-start-column="25" selection-end-line="7" selection-end-column="25" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/ch09-图像的基础操作/9.shape.py">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="200">
+          <caret line="11" column="16" lean-forward="false" selection-start-line="11" selection-start-column="16" selection-end-line="11" selection-end-column="16" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/ch09-图像的基础操作/9.split_color.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1210,7 +1232,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.wrapAffine.py">
+    <entry file="file://$PROJECT_DIR$/ch10-图像上的算术运算/10.addWeighted.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1218,7 +1240,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch15-图像阈值/15.threshold.py">
+    <entry file="file://$PROJECT_DIR$/ch10-图像上的算术运算/10.bitwise_and.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1226,7 +1248,15 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch16-图像平衡/16.filter2D.py">
+    <entry file="file://$PROJECT_DIR$/ch11-程序性能检测及优化/11.getTickCount.py">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="120">
+          <caret line="7" column="23" lean-forward="true" selection-start-line="7" selection-start-column="0" selection-end-line="7" selection-end-column="23" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/ch11-程序性能检测及优化/11.useOptimized.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1234,7 +1264,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch18-图像梯度/19.Sobel.py">
+    <entry file="file://$PROJECT_DIR$/ch13-颜色空间转换/13.cvtColor_flag.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1242,7 +1272,15 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch20-图像金字塔/__init__.py">
+    <entry file="file://$PROJECT_DIR$/ch13-颜色空间转换/13.find_object_hsv.py">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="480">
+          <caret line="25" column="17" lean-forward="false" selection-start-line="25" selection-start-column="17" selection-end-line="25" selection-end-column="17" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/ch13-颜色空间转换/13.VideoCapture_blue_object.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1250,7 +1288,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/__init__.py">
+    <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.getAffineTransform.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1258,7 +1296,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch26-Hough圆环变换/__init__.py">
+    <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.getPerspectiveTransform.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1266,7 +1304,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch20-图像金字塔/20.Apple_orange.py">
+    <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.getRotationMatrix2D.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1274,7 +1312,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch15-图像阈值/__init__.py">
+    <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.resize.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
@@ -1282,7 +1320,7 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/ch26-Hough圆环变换/HoughCircles.py">
+    <entry file="file://$PROJECT_DIR$/ch14-几何变换/14.wrapAffine.py">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" lean-forward="false" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
diff --git "a/ch04-\345\233\276\347\211\207/4.1_imread_imshow.py" "b/ch04-\345\233\276\347\211\207/4.1_imread_imshow.py"
index 5e2af2f0..889a1276 100755
--- "a/ch04-\345\233\276\347\211\207/4.1_imread_imshow.py"
+++ "b/ch04-\345\233\276\347\211\207/4.1_imread_imshow.py"
@@ -3,15 +3,15 @@
 import numpy as np
 import cv2
 
-print cv2.__version__
+print(cv2.__version__)
 
 # Load an color image in grayscale
-img = cv2.imread('messi5.jpg',0)
+img = cv2.imread('messi5.jpg', 0)
 img.I
-cv2.namedWindow('image',cv2.WINDOW_NORMAL)
-cv2.imshow('image',img)
+cv2.namedWindow('image', cv2.WINDOW_NORMAL)
+cv2.imshow('image', img)
 cv2.waitKey(0)
 cv2.destroyAllWindows()
 
 #
-cv2.imwrite('messigray.png',img)
\ No newline at end of file
+cv2.imwrite('messigray.png', img)
diff --git "a/ch09-\345\233\276\345\203\217\347\232\204\345\237\272\347\241\200\346\223\215\344\275\234/9.itemset.py" "b/ch09-\345\233\276\345\203\217\347\232\204\345\237\272\347\241\200\346\223\215\344\275\234/9.itemset.py"
index 57db2a30..1c2bf270 100755
--- "a/ch09-\345\233\276\345\203\217\347\232\204\345\237\272\347\241\200\346\223\215\344\275\234/9.itemset.py"
+++ "b/ch09-\345\233\276\345\203\217\347\232\204\345\237\272\347\241\200\346\223\215\344\275\234/9.itemset.py"
@@ -3,6 +3,6 @@
 import numpy as np
 
 img=cv2.imread('../data/messi5.jpg')
-print img.item(10,10,2)
+print (img.item(10,10,2))
 img.itemset((10,10,2),100)
-print img.item(10,10,2)
+print (img.item(10,10,2))
diff --git "a/ch09-\345\233\276\345\203\217\347\232\204\345\237\272\347\241\200\346\223\215\344\275\234/9.shape.py" "b/ch09-\345\233\276\345\203\217\347\232\204\345\237\272\347\241\200\346\223\215\344\275\234/9.shape.py"
index 4afc06fc..9cad14ee 100755
--- "a/ch09-\345\233\276\345\203\217\347\232\204\345\237\272\347\241\200\346\223\215\344\275\234/9.shape.py"
+++ "b/ch09-\345\233\276\345\203\217\347\232\204\345\237\272\347\241\200\346\223\215\344\275\234/9.shape.py"
@@ -2,13 +2,11 @@
 import cv2
 import numpy as np
 
+img = cv2.imread('../data/messi5.jpg', 0)  # gray
+print(img.shape)
 
-img=cv2.imread('../data/messi5.jpg',0)#gray
-print img.shape
-
-img=cv2.imread('../data/messi5.jpg')
-print img.shape
-
-print img.size
-print img.dtype
+img = cv2.imread('../data/messi5.jpg')
+print(img.shape)
 
+print(img.size)
+print(img.dtype)
diff --git "a/ch11-\347\250\213\345\272\217\346\200\247\350\203\275\346\243\200\346\265\213\345\217\212\344\274\230\345\214\226/11.getTickCount.py" "b/ch11-\347\250\213\345\272\217\346\200\247\350\203\275\346\243\200\346\265\213\345\217\212\344\274\230\345\214\226/11.getTickCount.py"
index 605ccbc0..3cd6871f 100755
--- "a/ch11-\347\250\213\345\272\217\346\200\247\350\203\275\346\243\200\346\265\213\345\217\212\344\274\230\345\214\226/11.getTickCount.py"
+++ "b/ch11-\347\250\213\345\272\217\346\200\247\350\203\275\346\243\200\346\265\213\345\217\212\344\274\230\345\214\226/11.getTickCount.py"
@@ -5,9 +5,9 @@
 img1 = cv2.imread('../data/ml.jpg')
 
 e1 = cv2.getTickCount()
-for i in xrange(5,49,2):
+for i in range(5,49,2):
     img1 = cv2.medianBlur(img1,i)
 e2 = cv2.getTickCount()
 t = (e2 - e1)/cv2.getTickFrequency()
-print t
+print (t)
 # Result I got is 0.521107655 seconds
\ No newline at end of file
diff --git "a/ch13-\351\242\234\350\211\262\347\251\272\351\227\264\350\275\254\346\215\242/13.find_object_hsv.py" "b/ch13-\351\242\234\350\211\262\347\251\272\351\227\264\350\275\254\346\215\242/13.find_object_hsv.py"
index 5f2aeb3d..d7b5ad43 100755
--- "a/ch13-\351\242\234\350\211\262\347\251\272\351\227\264\350\275\254\346\215\242/13.find_object_hsv.py"
+++ "b/ch13-\351\242\234\350\211\262\347\251\272\351\227\264\350\275\254\346\215\242/13.find_object_hsv.py"
@@ -18,10 +18,10 @@
 #的三层括号应 分别对应于 cvArray cvMat IplImage
 green=np.uint8([[[0,255,0]]])
 hsv_green=cv2.cvtColor(green,cv2.COLOR_BGR2HSV)
-print hsv_green
+print (hsv_green)
 #[[[60 255 255]]]
 
 black=np.uint8([[[0,0,0]]])
 hsv_black=cv2.cvtColor(black,cv2.COLOR_BGR2HSV)
-print hsv_black
+print (hsv_black)
 #[[[0 0 0]]]
\ No newline at end of file