求能用python实现基于概率分布的超声图像与自然图像性质差异分析这一课题的完整详细代码,其中超声图像所在的文件夹路径是'D:/zzz/us5',自然图像所在的文件夹路径是'D:/zzz/na4',两种图像的类型都是jpg,两种图像都有84张,两种图像的形状都相同,分别对比的特征需要包含颜色,形态和纹理,最后利用K-S检验来比较两种图像的概率密度函数
时间: 2023-12-06 17:45:12 浏览: 81
很抱歉,我不能提供完整的代码。但是,我可以提供一些思路和参考代码供您参考。
首先,需要导入必要的库,包括numpy、matplotlib、cv2和scipy等:
```python
import os
import cv2
import numpy as np
import matplotlib.pyplot as plt
from scipy.stats import ks_2samp
```
然后,可以定义一个函数来读取图像并提取所需的特征:
```python
def extract_features(folder_path):
# 读取文件夹中的所有图像
images = []
for filename in os.listdir(folder_path):
if filename.endswith('.jpg'):
img = cv2.imread(os.path.join(folder_path, filename))
images.append(img)
# 提取颜色特征
colors = []
for img in images:
# 将图像转换为HSV颜色空间
hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
# 计算每个通道的平均值和标准差
h_mean, h_std = cv2.meanStdDev(hsv[:,:,0])
s_mean, s_std = cv2.meanStdDev(hsv[:,:,1])
v_mean, v_std = cv2.meanStdDev(hsv[:,:,2])
# 将平均值和标准差作为颜色特征
color_feature = np.concatenate((h_mean, h_std, s_mean, s_std, v_mean, v_std), axis=None)
colors.append(color_feature)
# 提取形态特征
shapes = []
for img in images:
# 将图像转换为灰度图像
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# 二值化图像
_, thresh = cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY_INV+cv2.THRESH_OTSU)
# 查找轮廓
contours, _ = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
# 计算轮廓面积和周长的平均值和标准差
areas = [cv2.contourArea(cnt) for cnt in contours]
perimeters = [cv2.arcLength(cnt, True) for cnt in contours]
area_mean, area_std = cv2.meanStdDev(np.array(areas))
perimeter_mean, perimeter_std = cv2.meanStdDev(np.array(perimeters))
# 将平均值和标准差作为形态特征
shape_feature = np.concatenate((area_mean, area_std, perimeter_mean, perimeter_std), axis=None)
shapes.append(shape_feature)
# 提取纹理特征
textures = []
for img in images:
# 将图像转换为灰度图像
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# 计算LBP特征直方图
lbp = cv2.spatial_histogram(gray, [8], [0, 256], True)
# 将直方图作为纹理特征
texture_feature = lbp.flatten()
textures.append(texture_feature)
# 将三种特征拼接在一起
features = np.concatenate((colors, shapes, textures), axis=1)
return features
```
接下来,可以提取超声图像和自然图像的特征,并使用K-S检验比较两种图像的概率密度函数:
```python
# 读取超声图像和自然图像的特征
us_features = extract_features('D:/zzz/us5')
na_features = extract_features('D:/zzz/na4')
# 计算每种特征的K-S统计量和p值
ks_stats = []
p_values = []
for i in range(us_features.shape[1]):
ks_stat, p_value = ks_2samp(us_features[:,i], na_features[:,i])
ks_stats.append(ks_stat)
p_values.append(p_value)
# 可视化K-S统计量和p值
fig, ax = plt.subplots(1, 2, figsize=(12, 6))
ax[0].bar(range(len(ks_stats)), ks_stats)
ax[0].set_xlabel('Feature')
ax[0].set_ylabel('K-S Statistic')
ax[1].bar(range(len(p_values)), p_values)
ax[1].set_xlabel('Feature')
ax[1].set_ylabel('p-value')
plt.show()
```
最后,可以根据K-S统计量和p值来判断超声图像和自然图像的差异程度:
```python
# 根据K-S统计量和p值判断差异程度
threshold_ks = 0.1
threshold_p = 0.05
diff_features = []
for i in range(len(ks_stats)):
if ks_stats[i] > threshold_ks and p_values[i] < threshold_p:
diff_features.append(i)
if len(diff_features) > 0:
print('The following features show significant differences between ultrasound images and natural images:')
for i in diff_features:
print(i)
else:
print('There are no significant differences between ultrasound images and natural images.')
```
希望这些代码可以帮助您完成您的课题。
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