迁移 Flutter 端与训练脚本，模型/训练产物移出 git（遵循纯代码约定）

2026-08-24 12:35:24 +08:00
parent d056f01965
commit 961523d94c
218 changed files with 13391 additions and 3232 deletions
@@ -0,0 +1,69 @@
+class ViewRect {
+  final double left;
+  final double top;
+  final double right;
+  final double bottom;
+
+  const ViewRect(this.left, this.top, this.right, this.bottom);
+
+  double get width => right - left;
+  double get height => bottom - top;
+  double get centerX => (left + right) / 2;
+  double get centerY => (top + bottom) / 2;
+}
+
+/// 模型归一化坐标 → 预览视图坐标（含传感器旋转与 FIT_CENTER 裁剪）。
+class CoordinateMapper {
+  static ViewRect mapToView(
+    double normLeft,
+    double normTop,
+    double normRight,
+    double normBottom,
+    int rotation,
+    int imageW,
+    int imageH,
+    double viewW,
+    double viewH,
+  ) {
+    // 1) 旋转校正：图像方向 → 竖屏视图方向（归一化坐标）
+    late final double x0, y0, x1, y1;
+    switch (rotation) {
+      case 90:
+        x0 = 1 - normBottom;
+        y0 = normLeft;
+        x1 = 1 - normTop;
+        y1 = normRight;
+      case 180:
+        x0 = 1 - normRight;
+        y0 = 1 - normBottom;
+        x1 = 1 - normLeft;
+        y1 = 1 - normTop;
+      case 270:
+        x0 = normTop;
+        y0 = 1 - normRight;
+        x1 = normBottom;
+        y1 = 1 - normLeft;
+      default:
+        x0 = normLeft;
+        y0 = normTop;
+        x1 = normRight;
+        y1 = normBottom;
+    }
+    // 2) 旋转后图像在竖屏方向上的尺寸
+    final portrait = rotation == 90 || rotation == 270;
+    final portW = portrait ? imageH : imageW;
+    final portH = portrait ? imageW : imageH;
+    // 3) FIT_CENTER 缩放与居中偏移
+    final scale = viewW / portW < viewH / portH
+        ? viewW / portW
+        : viewH / portH;
+    final offsetX = (viewW - portW * scale) / 2;
+    final offsetY = (viewH - portH * scale) / 2;
+    return ViewRect(
+      x0 * portW * scale + offsetX,
+      y0 * portH * scale + offsetY,
+      x1 * portW * scale + offsetX,
+      y1 * portH * scale + offsetY,
+    );
+  }
+}