diff --git a/hist.py b/hist.py
new file mode 100644
index 0000000..388234e
--- /dev/null
+++ b/hist.py
@@ -0,0 +1,20 @@
+import cv2
+import numpy as np
+
+
+img_path = 'data/data1015/middle/rgb0.png'
+img = cv2.imread(img_path)
+img = cv2.cvtColor(img, cv2.COLOR_BGR2LAB)
+x = img.reshape(img.shape[0]*img.shape[1], img.shape[2])
+hist, bins = np.histogram(x[:, 0], bins=10)
+hist = hist[1:]
+bins = bins[1:]
+hist_number = np.argmax(hist)
+x = x[(x[:, 0] > bins[hist_number]) & (x[:, 0] < bins[hist_number + 1]), :]
+mean_value = np.mean(x, axis=0).astype(np.uint8)
+y = np.zeros((img.shape[0]*img.shape[1], img.shape[2]), dtype=np.uint8)
+y[:, ] = mean_value
+#lab转rgb再保存
+y = cv2.cvtColor(y.reshape(img.shape[0], img.shape[1], img.shape[2]), cv2.COLOR_LAB2BGR)
+cv2.imwrite('3.png', y.reshape(img.shape[0], img.shape[1], img.shape[2]))
+