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import base64 |
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import io |
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from PIL import Image |
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def compress_image(base64_str, quality=85, max_size=(1024, 1024)): |
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""" |
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压缩base64编码的图片 |
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参数: |
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base64_str: base64编码的图片字符串 |
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quality: 压缩质量 (1-100) |
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max_size: 最大尺寸 (宽, 高) |
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返回: |
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压缩后的base64编码字符串 |
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""" |
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try: |
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img_data = base64.b64decode(base64_str) |
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img = Image.open(io.BytesIO(img_data)) |
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if img.width > max_size[0] or img.height > max_size[1]: |
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img.thumbnail(max_size, Image.LANCZOS) |
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output = io.BytesIO() |
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img.save(output, format="PNG", optimize=True, quality=quality) |
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compressed_base64 = base64.b64encode(output.getvalue()).decode("utf-8") |
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return compressed_base64 |
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except Exception as e: |
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print(f"图片压缩失败: {e}") |
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return base64_str |
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