使用Python进行图像裁剪的多种方法及代码示例

from PIL import Image

# 打开图像
img = Image.open('image.jpg')

# 定义裁剪区域，例如左上角坐标为 (100, 100)，右下角坐标为 (300, 300)
left = 100
top = 100
right = 300
bottom = 300

# 进行裁剪
cropped_img = img.crop((left, top, right, bottom))

# 保存裁剪后的图像
cropped_img.save('cropped_image.jpg')

import cv2

# 读取图像
img = cv2.imread('image.jpg')

# 定义裁剪区域，例如左上角坐标为 (100, 100)，右下角坐标为 (300, 300)
cropped_img = img[100:300, 100:300]

# 保存裁剪后的图像
cv2.imwrite('cropped_image.jpg', cropped_img)

from PIL import Image

# 打开图像
img = Image.open('image.jpg')

# 循环裁剪
for i in range(0, 350, 50):
    region = img.crop((i, 0, i + 50, 50))
    region.save(f'./test/{i}.png')

from PIL import Image

def crop_center_image(image_path, output_path, percentage):
    img = Image.open(image_path)
    width, height = img.size
    new_width = int(width * percentage)
    new_height = int(height * percentage)
    left = (width - new_width) // 2
    top = (height - new_height) // 2
    right = left + new_width
    bottom = top + new_height
    cropped_img = img.crop((left, top, right, bottom))
    cropped_img.save(output_path)

crop_center_image('input_image.jpg', 'output_image.jpg', 0.8)

import os
from PIL import Image

def batch_crop_images(input_folder, output_folder, crop_size):
    if not os.path.exists(output_folder):
        os.makedirs(output_folder)
    for filename in os.listdir(input_folder):
        if filename.endswith(('.jpg', '.png', '.jpeg')):
            img = Image.open(os.path.join(input_folder, filename))
            width, height = img.size
            left = (width - crop_size[0]) // 2
            top = (height - crop_size[1]) // 2
            right = left + crop_size[0]
            bottom = top + crop_size[1]
            cropped_img = img.crop((left, top, right, bottom))
            cropped_img.save(os.path.join(output_folder, filename))

batch_crop_images('input_folder', 'output_folder', (200, 200))

from PIL import Image

def crop_image_by_coordinates(image_path, output_path, x_range, y_range):
    img = Image.open(image_path)
    cropped_img = img.crop((x_range[0], y_range[0], x_range[1], y_range[1]))
    cropped_img.save(output_path)

crop_image_by_coordinates('input_image.jpg', 'output_image.jpg', (100, 300), (50, 250))

from PIL import Image
import os

def batch_crop_images(input_folder, output_folder):
    if not os.path.exists(output_folder):
        os.makedirs(output_folder)
    for filename in os.listdir(input_folder):
        if filename.endswith(('.jpg', '.png', '.jpeg')):
            img = Image.open(os.path.join(input_folder, filename))
            # 定义裁剪区域，这里假设都是左上角坐标为 (100, 100)，右下角坐标为 (300, 300)
            left = 100
            top = 100
            right = 300
            bottom = 300
            cropped_img = img.crop((left, top, right, bottom))
            cropped_img.save(os.path.join(output_folder, filename))

input_folder = 'input_images_folder'
output_folder = 'output_images_folder'
batch_crop_images(input_folder, output_folder)