图片压缩python

在这里插入图片描述

linux粘贴文本格式错乱：
vi/vim

:set paste

然后再 insert ，粘贴

centos安装pillow图像处理库：
引用：https://blog.csdn.net/newbieLCQ/article/details/125345335

linux赋予执行权限：

# 创建文件
touch comperss.py
# 赋予权限
chmod +x compress.py

png使用pillow报错，不知道为什么，，后面使用的pngquant。。

# 安装pngquant
brew install pngquant
# 测试图片压缩，，  quality 参数格式是min-max ，， 其中min：是最小质量值，max是最大质量值，，较低的min会更大的压缩和更低的质量，较高的max会保留更多的图像质量
pngquant --quality=10-30 --output output.png --force --verbose 222.png

import os
import subprocess
from PIL import Image, ImageFile# 允许加载截断的图像文件
ImageFile.LOAD_TRUNCATED_IMAGES = Truedef compress_image(input_path, output_path, target_size_kb, min_quality=1, max_quality=95):target_size_bytes = target_size_kb * 1024with Image.open(input_path) as img:img_format = img.formatlow = min_qualityhigh = max_qualitybest_quality = lowwhile low <= high:mid = (low + high) // 2img.save(output_path, format=img_format, quality=mid, optimize=True)output_size = os.path.getsize(output_path)if output_size <= target_size_bytes:best_quality = midlow = mid + 1else:high = mid - 1img.save(output_path, format=img_format, quality=best_quality, optimize=True)return best_qualitydef compress_image_in_directory(directory, target_size_kb=50):for root, _, files in os.walk(directory):for filename in files:if filename.lower().endswith(('.jpg', '.jpeg', '.bmp', '.gif')):input_path = os.path.join(root, filename)output_path = os.path.join(root, f"{filename}")final_quality = compress_image(input_path, output_path, target_size_kb)print(f"{filename}_final quality is {final_quality}")elif filename.lower().endswith('.png'):input_path = os.path.join(root, filename)output_path = os.path.join(root, f"f_{filename}")final_quality = compress_image_png(input_path, output_path, target_size_kb)print(f"{filename}_final quality is {final_quality}")def compress_image_png(input_path, output_path, target_size_kb=50, min_quality=1, max_quality=95):target_size_bytes = target_size_kb * 1024with Image.open(input_path) as img:img_format = img.formatif img_format.lower() == 'png':success = compress_png_with_pngquant(input_path, output_path, target_size_kb)# if success:#     return "pngquant"# else:#     for compress_level in range(10, 0, -1):#         img.save(output_path, format=img_format, compress_level=compress_level)#         output_size = os.path.getsize(output_path)#         if output_size <= target_size_bytes:#             return compress_level#     img.save(output_path, format=img_format, optimize=True, compress_level=compress_level)#     return 1return "success"def compress_png_with_pngquant(input_path, output_path, target_size_kb):target_size_bytes = target_size_kb * 1024# quality设置压缩，， 为1:压缩到最小command = ['pngquant', '--quality=1', '--output', output_path, '--force', '--', input_path]try:subprocess.run(command, check=True)output_size = os.path.getsize(output_path)return output_size <= target_size_bytesexcept subprocess.CalledProcessError as e:print(f"Error during pngquant compression: {e}")return Falseexcept FileNotFoundError as e:print(f"pngquant not found: {e}")return False# 示例：指定目录路径
directory_path = '/Users/chenjie/code/python-learn/python410/img'  # 替换为你的图片目录路径
compress_image_in_directory(directory_path)