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<h1 id="rectify">Rectify 透视校正</h1>
<p><code>operators/rectify_tool/operators.py</code> 定义 <code>RectifyImagePerspective</code> 与 <code>RectifyTool</code>,将图片内的四角区域校正为矩形。<code>geometry.py</code> 负责四角验证与像素校正,<code>preview.py</code> 负责预览图、Overlay 和宽高比控制,<code>__init__.py</code> 导出类型及注册清单。</p>
<pre class="mermaid"><code>flowchart TD
A[点选四角] --&gt; B[规范为凸 Quad 并检查图片交叠]
B --&gt; C[512×512 预览与宽高比调整]
C --&gt; D[按像素密度和输出上限确定尺寸]
D --&gt; E[分块 Homography 与预乘 Alpha 插值]
E --&gt; F[按可见 Alpha 裁剪]
F --&gt; G[映射 placement bounds 并替换 Packed Image]</code></pre>
<p>四角允许任意点击顺序,退化或非凸输入在提交前校验。预览根据源颜色空间配置显示,像素重采样复用 <code>common/image.py</code>。输出最长边上限 8192,总像素上限 16,777,216。</p>
<p><code>replace_empty_image()</code> 根据校正区域的 placement bounds 调整画框,保留源 Image 名称、对象身份和共享引用语义。</p>
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