基于Python实现一个图片压缩工具

pip install Pillow tqdm

from PIL import Image
import os

def compress_image(input_path, output_path, quality=80):
    """
    压缩图片的函数

    :param input_path: 输入图片文件路径
    :param output_path: 输出图片文件路径
    :param quality: 图片质量（0-100），默认为80
    """
    try:
        # 打开输入图片
        with Image.open(input_path) as img:
            # 保存为输出图片（JPG格式），设置质量
            img.save(output_path, "JPEG", quality=quality)
        return True
    except Exception as e:
        print(f"压缩图片时出错：{e}")
        return False

# 示例用法
input_image = "input.jpg"
output_image = "output.jpg"
compress_image(input_image, output_image, quality=60)

from PIL import Image
import os
from tqdm import tqdm

def batch_compress_images(input_folder, output_folder, quality=80):
    """
    批量压缩图片的函数

    :param input_folder: 输入图片文件夹路径
    :param output_folder: 输出图片文件夹路径
    :param quality: 图片质量（0-100），默认为80
    """
    # 创建输出文件夹
    os.makedirs(output_folder, exist_ok=True)
    
    # 获取输入文件夹中的所有图片文件
    image_files = [f for f in os.listdir(input_folder) if f.endswith(('.jpg', '.jpeg', '.png', '.gif', '.bmp'))]
    
    for image_file in tqdm(image_files, desc="压缩进度"):
        try:
            input_path = os.path.join(input_folder, image_file)
            output_path = os.path.join(output_folder, image_file)
            
            # 压缩图片
            compress_image(input_path, output_path, quality)
        except Exception as e:
            print(f"处理图片 {image_file} 时出错：{e}")

# 示例用法
input_folder = "input_images"
output_folder = "output_images"
batch_compress_images(input_folder, output_folder, quality=60)

from PIL import Image
import os
from tqdm import tqdm

def auto_compress_images(input_folder, output_folder, target_size_kb):
    """
    自动选择压缩质量以达到目标文件大小的函数

    :param input_folder: 输入图片文件夹路径
    :param output_folder: 输出图片文件夹路径
    :param target_size_kb: 目标文件大小（KB）
    """
    # 创建输出文件夹
    os.makedirs(output_folder, exist_ok=True)
    
    # 获取输入文件夹中的所有图片文件
    image_files = [f for f in os.listdir(input_folder) if f.endswith(('.jpg', '.jpeg', '.png', '.gif', '.bmp'))]
    
    for image_file in tqdm(image_files, desc="压缩进度"):
        try:
            input_path = os.path.join(input_folder, image_file)
            output_path = os.path.join(output_folder, image_file)
            
            # 初始化质量
            quality = 80  # 初始质量设为80
            
            while os.path.getsize(input_path) > target_size_kb * 1024:
                # 压缩图片并保存到临时文件
                temp_output_path = os.path.join(output_folder, "temp.jpg")
                compress_image(input_path, temp_output_path, quality)
                
                # 用临时文件替换原始文件
                os.replace(temp_output_path, input_path)
                
                # 减小质量以进一步压缩
                quality -= 10
                if quality < 10:
                    break
        except Exception as e:
            print(f"处理图片 {image_file} 时出错：{e}")

# 示例用法
input_folder = "input_images"
output_folder = "output_images_auto"
target_size_kb = 100  # 目标文件大小（KB）
auto_compress_images(input_folder, output_folder, target_size_kb)