Python을 사용하여 사진에서 이미지 향상을 수행하는 방법

from PIL import Image
import numpy as np
import matplotlib.pyplot as plt

# 读取图片
img = Image.open('example.jpg')

# 显示图片
plt.imshow(img)
plt.axis('off')
plt.show()

# 调整图像亮度
def adjust_brightness(img, factor):
    # 将图像转为numpy数组
    img_array = np.array(img)
    
    # 通过调整每个像素点的RGB值来改变亮度
    adjusted_array = img_array * factor
    
    # 将改变后的数组转为图像
    adjusted_img = Image.fromarray(adjusted_array.astype('uint8'))
    
    return adjusted_img

# 设置亮度调整参数
brightness_factor = 1.5

# 调整亮度并显示结果
adjusted_img = adjust_brightness(img, brightness_factor)
plt.imshow(adjusted_img)
plt.axis('off')
plt.show()

# 调整图像对比度
def adjust_contrast(img, factor):
    # 将图像转为numpy数组
    img_array = np.array(img)
    
    # 通过调整每个像素点的亮度差值来改变对比度
    adjusted_array = (img_array - img_array.mean()) * factor + img_array.mean()
    
    # 将改变后的数组转为图像
    adjusted_img = Image.fromarray(adjusted_array.astype('uint8'))
    
    return adjusted_img

# 设置对比度调整参数
contrast_factor = 1.5

# 调整对比度并显示结果
adjusted_img = adjust_contrast(img, contrast_factor)
plt.imshow(adjusted_img)
plt.axis('off')
plt.show()

# 应用图像滤波器
def apply_filter(img, filter):
    # 将图像转为numpy数组
    img_array = np.array(img)
    
    # 应用滤波器
    filtered_array = np.convolve(img_array.flatten(), filter.flatten(), mode='same').reshape(img_array.shape)
    
    # 将滤波后的数组转为图像
    filtered_img = Image.fromarray(filtered_array.astype('uint8'))
    
    return filtered_img

# 设置滤波器
filter = np.array([[1, 1, 1],
                   [1, -8, 1],
                   [1, 1, 1]])

# 应用滤波器并显示结果
filtered_img = apply_filter(img, filter)
plt.imshow(filtered_img)
plt.axis('off')
plt.show()