hvning
diff --git a/‎blog16-BH/2016.png‎
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diff --git a/‎blog16-BH/2019.png‎
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diff --git a/‎blog16-BH/blog16-image02.py‎
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diff --git a/‎blog16-BH/blog16-image03.py‎
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diff --git a/‎blog16-BH/miao.jpg‎
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+# -*- coding: utf-8 -*-
+import numpy as np
+import matplotlib.pyplot as plt
+import cv2
+
+#绘制曲线
+def log_plot(c):
+    x = np.arange(0, 256, 0.01)
+    y = c * np.log(1 + x)
+    plt.plot(x, y, 'r', linewidth=1)
+    plt.rcParams['font.sans-serif']=['SimHei'] #正常显示中文标签
+    plt.title(u'对数变换函数')
+    plt.xlim(0, 255), plt.ylim(0, 255)
+    plt.show()
+
+#对数变换
+def log(c, img):
+    output = c * np.log(1.0 + img)
+    output = np.uint8(output + 0.5)
+    return output
+
+#读取原始图像
+img = cv2.imread('2016.png')
+
+#绘制对数变换曲线
+log_plot(42)
+
+#图像灰度对数变换
+output = log(42, img)
+
+#显示图像
+cv2.imshow('Input', img)
+cv2.imshow('Output', output)
+cv2.waitKey(0)
+cv2.destroyAllWindows()
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+# -*- coding: utf-8 -*-
+import numpy as np
+import matplotlib.pyplot as plt
+import cv2
+
+#绘制曲线
+def gamma_plot(c, v):
+    x = np.arange(0, 256, 0.01)
+    y = c*x**v
+    plt.plot(x, y, 'r', linewidth=1)
+    plt.rcParams['font.sans-serif']=['SimHei'] #正常显示中文标签
+    plt.title(u'伽马变换函数')
+    plt.xlim([0, 255]), plt.ylim([0, 255])
+    plt.show()
+
+#伽玛变换
+def gamma(img, c, v):
+    lut = np.zeros(256, dtype=np.float32)
+    for i in range(256):
+        lut[i] = c * i ** v
+    output_img = cv2.LUT(img, lut) #像素灰度值的映射
+    output_img = np.uint8(output_img+0.5)  
+    return output_img
+
+#读取原始图像
+img = cv2.imread('2019.png')
+
+#绘制伽玛变换曲线
+gamma_plot(0.00000005, 4.0)
+
+#图像灰度伽玛变换
+output = gamma(img, 0.00000005, 4.0)
+
+#显示图像
+cv2.imshow('Imput', img)
+cv2.imshow('Output', output)
+cv2.waitKey(0)
+cv2.destroyAllWindows()