update web workflow and preview behavior

WebSite/src/App.tsx

@@ -86,12 +86,13 @@ const DEFAULT_PACKAGE_OPTIONS: PackageOptions = {
 };
 
 const VIDEO_SOURCE_OPTIONS = [
-  { key: 'original', label: '原始序列' },
+  { key: 'hard_boundary', label: '硬边界', mode: 'hard_boundary' },
-  { key: 'hard_boundary', label: '硬边界' },
+  { key: 'gaussian_smooth', label: '高斯平滑', mode: 'gaussian_smooth' },
-  { key: 'gaussian_smooth', label: '高斯平滑' },
+  { key: 'soft_transition', label: '软过渡重建', mode: 'soft_transition' },
-  { key: 'soft_transition', label: '软过渡重建' },
 ];
 
+const PREVIEW_ALGORITHM_OPTIONS = VIDEO_SOURCE_OPTIONS;
+
 type LibraryItem = {
   id: string;
   patientId: string;
@@ -284,6 +285,8 @@ export default function App() {
   // --- Simulation State (Workspace) ---
   const [cervicalRotation, setCervicalRotation] = useState(14.5);
   const [transitionWidth, setTransitionWidth] = useState(90);
+  const [previewGaussianSigma, setPreviewGaussianSigma] = useState(3);
+  const [previewAlgorithm, setPreviewAlgorithm] = useState('soft_transition');
   const [showPreviewCutoffLine, setShowPreviewCutoffLine] = useState(true);
   const [isSimulating, setIsSimulating] = useState(restoredDeformationJob?.job.status === 'running');
   const [progress, setProgress] = useState(restoredDeformationJob ? progressFromJob(restoredDeformationJob.job, restoredDeformationJob.progress) : 0);
@@ -299,7 +302,7 @@ export default function App() {
   const [packageOptions, setPackageOptions] = useState<PackageOptions>(DEFAULT_PACKAGE_OPTIONS);
   const [videoMaxAngle, setVideoMaxAngle] = useState(20);
   const [videoDuration, setVideoDuration] = useState(6);
-  const [videoSource, setVideoSource] = useState('original');
+  const [videoSource, setVideoSource] = useState('hard_boundary');
   const [showVideoArrow, setShowVideoArrow] = useState(true);
 
   // --- User Management Shared State ---
@@ -309,13 +312,12 @@ export default function App() {
   const [pwChangeInput, setPwChangeInput] = useState('');
   const [showAddUser, setShowAddUser] = useState(false);
   const [activeUserMenu, setActiveUserMenu] = useState<string | null>(null);
+  const [isResettingDemo, setIsResettingDemo] = useState(false);
 
   const selectedDataset = libraryData.find(item => item.id === selectedLibraryId) || libraryData[0];
   const selectedInputDir = selectedDataset?.dicomPath || '';
   const selectedVideoSource = VIDEO_SOURCE_OPTIONS.find(option => option.key === videoSource) || VIDEO_SOURCE_OPTIONS[0];
-  const videoSourceInputDir = videoSource === 'original'
+  const videoSourceInputDir = selectedInputDir;
-    ? selectedInputDir
-    : deformationJob?.result?.outputs?.[videoSource] || '';
   const isVideoSourceReady = Boolean(videoSourceInputDir);
 
   useEffect(() => {
@@ -364,6 +366,16 @@ export default function App() {
     link.remove();
   };
 
+  const downloadPreviewImage = () => {
+    if (!previewImage) return;
+    const link = document.createElement('a');
+    link.href = previewImage;
+    link.download = `quick_2d_preview_${previewAlgorithm}_${cervicalRotation.toFixed(1)}deg.png`;
+    document.body.appendChild(link);
+    link.click();
+    link.remove();
+  };
+
   const clearDeformationTask = () => {
     setDeformationJob(null);
     setProgress(0);
@@ -449,6 +461,31 @@ export default function App() {
     return items;
   };
 
+  const resetDemoEnvironment = async () => {
+    if (isResettingDemo) return;
+    if (!confirm('确定恢复演示环境出厂设置吗？影像数据库将只保留 Ori_Head_CT，并清空当前任务结果。')) return;
+
+    setIsResettingDemo(true);
+    try {
+      const data = await apiRequest('/api/demo/reset', { method: 'POST' }) as { items?: LibraryItem[] };
+      const items = data.items || [];
+      setLibraryData(items);
+      setSelectedLibraryId(items[0]?.id || '');
+      setLibraryInfo(null);
+      setPreviewImage('');
+      setVideoJob(null);
+      setZipJobs({});
+      clearDeformationTask();
+      setBackendOnline(true);
+      setBackendMessage('演示环境已恢复出厂设置');
+      showToast('已恢复演示环境出厂设置');
+    } catch (error) {
+      showToast((error as Error).message);
+    } finally {
+      setIsResettingDemo(false);
+    }
+  };
+
   const refreshBackendDefaults = async () => {
     try {
       const data = await apiRequest('/api/defaults');
@@ -755,6 +792,9 @@ export default function App() {
           body: JSON.stringify({
             inputDir: selectedInputDir,
             angleDegrees: cervicalRotation,
+            transitionWidth,
+            gaussianSigma: previewGaussianSigma,
+            mode: previewAlgorithm,
             showCutoffLine: showPreviewCutoffLine
           }),
           signal: controller.signal
@@ -778,7 +818,7 @@ export default function App() {
       controller.abort();
       window.clearTimeout(timer);
     };
-  }, [currentPage, selectedInputDir, cervicalRotation, showPreviewCutoffLine]);
+  }, [currentPage, selectedInputDir, cervicalRotation, transitionWidth, previewGaussianSigma, previewAlgorithm, showPreviewCutoffLine]);
 
   const handleRunSimulation = async () => {
     if (isSimulating) return;
@@ -808,7 +848,7 @@ export default function App() {
   const handleGenerateVideo = async () => {
     if (videoJob?.status === 'running') return;
     if (!videoSourceInputDir) {
-      showToast(videoSource === 'original' ? '请选择影像库数据源' : '请先完成四状态输出，再生成该状态视频');
+      showToast('请选择影像库数据源');
       return;
     }
     try {
@@ -819,6 +859,7 @@ export default function App() {
           maxAngle: videoMaxAngle,
           durationSeconds: videoDuration,
           showArrow: showVideoArrow,
+          mode: selectedVideoSource.mode,
         })
       }) as BackendJob;
       setVideoJob(job);
@@ -989,13 +1030,33 @@ export default function App() {
 
                   <div className="space-y-4 pt-2">
                     <div>
-                      <div className="flex justify-between text-xs font-bold mb-2 text-slate-600"><span>仰头角度</span><span className="text-blue-600 font-mono">{cervicalRotation.toFixed(1)}°</span></div>
+                      <div className="flex justify-between text-xs font-bold mb-2 text-slate-600"><span>快速预览算法</span><span className="text-blue-600 font-mono">{PREVIEW_ALGORITHM_OPTIONS.find(option => option.key === previewAlgorithm)?.label}</span></div>
-                      <input type="range" min="0" max="20" step="0.5" value={cervicalRotation} onChange={e => setCervicalRotation(parseFloat(e.target.value))} className="w-full h-1.5 bg-slate-100 rounded-lg appearance-none cursor-pointer accent-blue-600 opacity-80 hover:opacity-100 transition-opacity" />
+                      <select
+                        value={previewAlgorithm}
+                        onChange={event => setPreviewAlgorithm(event.target.value)}
+                        className="w-full px-3 py-2.5 bg-slate-50 border border-slate-200 rounded-xl outline-none focus:ring-2 focus:ring-blue-500 text-xs font-bold text-slate-700"
+                      >
+                        {PREVIEW_ALGORITHM_OPTIONS.map(option => (
+                          <option key={option.key} value={option.key}>{option.label}</option>
+                        ))}
+                      </select>
                     </div>
                     <div>
-                      <div className="flex justify-between text-xs font-bold mb-2 text-slate-600"><span>过渡平滑宽度</span><span className="text-blue-600 font-mono">{transitionWidth}</span></div>
+                      <div className="flex justify-between text-xs font-bold mb-2 text-slate-600"><span>仰头角度</span><span className="text-blue-600 font-mono">{cervicalRotation.toFixed(1)}°</span></div>
+                      <input type="range" min="0" max="45" step="0.5" value={cervicalRotation} onChange={e => setCervicalRotation(parseFloat(e.target.value))} className="w-full h-1.5 bg-slate-100 rounded-lg appearance-none cursor-pointer accent-blue-600 opacity-80 hover:opacity-100 transition-opacity" />
+                    </div>
+                    {previewAlgorithm === 'gaussian_smooth' && (
+                      <div>
+                        <div className="flex justify-between text-xs font-bold mb-2 text-slate-600"><span>高斯平滑强度</span><span className="text-blue-600 font-mono">{previewGaussianSigma.toFixed(1)}</span></div>
+                        <input type="range" min="1" max="12" step="0.5" value={previewGaussianSigma} onChange={e => setPreviewGaussianSigma(parseFloat(e.target.value))} className="w-full h-1.5 bg-slate-100 rounded-lg appearance-none cursor-pointer accent-blue-600 opacity-80 hover:opacity-100 transition-opacity" />
+                      </div>
+                    )}
+                    {previewAlgorithm === 'soft_transition' && (
+                      <div>
+                        <div className="flex justify-between text-xs font-bold mb-2 text-slate-600"><span>软过渡宽度</span><span className="text-blue-600 font-mono">{transitionWidth}</span></div>
                         <input type="range" min="50" max="160" step="10" value={transitionWidth} onChange={e => setTransitionWidth(parseInt(e.target.value, 10))} className="w-full h-1.5 bg-slate-100 rounded-lg appearance-none cursor-pointer accent-blue-600 opacity-80 hover:opacity-100 transition-opacity" />
                       </div>
+                    )}
                     <button
                       onClick={() => setShowPreviewCutoffLine(value => !value)}
                       className={`w-full py-2.5 rounded-xl text-xs font-black transition-all flex items-center justify-center gap-2 border ${
@@ -1050,8 +1111,8 @@ export default function App() {
                   </div>
                   <div>
                     <div className="flex justify-between text-[10px] font-bold mb-2 text-slate-500">
-                      <span>视频来源序列</span>
+                      <span>视频形变方式</span>
-                      {videoSource !== 'original' && !isVideoSourceReady && <span className="text-amber-500">需先生成四状态</span>}
+                      {!isVideoSourceReady && <span className="text-amber-500">请选择影像库数据源</span>}
                     </div>
                     <select
                       value={videoSource}
@@ -1069,7 +1130,7 @@ export default function App() {
                   <div className="grid grid-cols-2 gap-4">
                     <div>
                       <div className="flex justify-between text-[10px] font-bold mb-2 text-slate-500"><span>最大角度</span><span>{videoMaxAngle}°</span></div>
-                      <input type="range" min="5" max="30" step="1" value={videoMaxAngle} onChange={e => setVideoMaxAngle(parseInt(e.target.value, 10))} className="w-full accent-blue-600" />
+                      <input type="range" min="5" max="45" step="1" value={videoMaxAngle} onChange={e => setVideoMaxAngle(parseInt(e.target.value, 10))} className="w-full accent-blue-600" />
                     </div>
                     <div>
                       <div className="flex justify-between text-[10px] font-bold mb-2 text-slate-500"><span>时长</span><span>{videoDuration}s</span></div>
@@ -1122,10 +1183,20 @@ export default function App() {
                       <h4 className="font-black text-slate-800">快速 2D 预览</h4>
                       <p className="text-[10px] text-slate-400 font-bold mt-1">对应 head_extension_app.py 的 preview_deform_2d</p>
                     </div>
+                    <div className="flex items-center gap-3">
                       <div className="text-right">
                         <span className="text-[10px] font-mono text-slate-400">{cervicalRotation.toFixed(1)} DEG</span>
                         {isPreviewLoading && <p className="text-[9px] font-bold text-blue-500 mt-1">自动更新中...</p>}
                       </div>
+                      <button
+                        onClick={downloadPreviewImage}
+                        disabled={!previewImage}
+                        className="w-9 h-9 rounded-xl bg-slate-100 text-slate-500 hover:bg-blue-600 hover:text-white transition-all flex items-center justify-center disabled:opacity-40 disabled:hover:bg-slate-100 disabled:hover:text-slate-500"
+                        title="下载当前快速 2D 预览图"
+                      >
+                        <Download size={15} />
+                      </button>
+                    </div>
                   </div>
                   <div className="h-[360px] bg-slate-950 flex items-center justify-center">
                     {previewImage ? (
@@ -1399,6 +1470,23 @@ export default function App() {
                 </div>
               )}
 
+              {currentUser?.role === 'admin' && (
+                <div className="bg-white p-8 rounded-[2.5rem] border border-red-100 shadow-sm flex items-center justify-between gap-6">
+                  <div>
+                    <h3 className="font-black text-slate-800">演示环境出厂设置</h3>
+                    <p className="text-xs text-slate-400 font-bold mt-2">恢复后影像数据库只保留 Ori_Head_CT，并清空当前任务结果。</p>
+                  </div>
+                  <button
+                    onClick={resetDemoEnvironment}
+                    disabled={isResettingDemo}
+                    className="px-6 py-3.5 bg-red-50 text-red-600 rounded-2xl text-xs font-black hover:bg-red-600 hover:text-white transition-all flex items-center gap-3 disabled:opacity-60 disabled:cursor-wait"
+                  >
+                    <RefreshCw size={15} className={isResettingDemo ? 'animate-spin' : ''} />
+                    {isResettingDemo ? '正在恢复' : '恢复演示环境出厂设置'}
+                  </button>
+                </div>
+              )}
+
               {/* User List Header */}
               <div className="flex items-center justify-between px-4">
                 <h3 className="text-xs font-black text-slate-400 uppercase tracking-[0.2em]">系统权限生命周期管理</h3>

generate_head_extension_video.py

@@ -5,6 +5,7 @@ from pathlib import Path
 import imageio.v2 as imageio
 import numpy as np
 from PIL import Image, ImageDraw, ImageFont
+from scipy.ndimage import gaussian_filter
 from scipy.ndimage import map_coordinates
 
 from head_extension_app import (
@@ -20,9 +21,41 @@ OUTPUT_DIR = Path("ppt_video")
 FPS = 30
 DURATION_SECONDS = 6
 END_HOLD_SECONDS = 1
+VIDEO_MODES = {"hard_boundary", "gaussian_smooth", "soft_transition"}
+MODE_LABELS = {
+    "hard_boundary": "Hard boundary",
+    "gaussian_smooth": "Gaussian smooth",
+    "soft_transition": "Soft transition",
+}
 
 
-def video_soft_bend_2d(image, angle_degrees):
+def normalize_mode(mode):
+    return mode if mode in VIDEO_MODES else "soft_transition"
+
+
+def video_motion_weight(height, width, mode):
+    mode = normalize_mode(mode)
+    yy, xx = np.mgrid[0:height, 0:width]
+    full_motion_y = height * 0.50
+    fixed_y = height * 0.92
+    boundary_y = (full_motion_y + fixed_y) * 0.5
+
+    if mode == "hard_boundary":
+        return (yy <= boundary_y).astype(np.float32)
+
+    if mode == "gaussian_smooth":
+        hard = (yy <= boundary_y).astype(np.float32)
+        return np.clip(gaussian_filter(hard, sigma=height * 0.025), 0, 1).astype(np.float32)
+
+    t = np.clip((yy - full_motion_y) / (fixed_y - full_motion_y), 0, 1)
+    weight = 1 - (t * t * (3 - 2 * t))
+
+    x_soft = np.clip((xx - width * 0.15) / (width * 0.75), 0, 1)
+    x_soft = x_soft * x_soft * (3 - 2 * x_soft)
+    return np.clip(weight * (0.90 + 0.10 * x_soft), 0, 1).astype(np.float32)
+
+
+def video_soft_bend_2d(image, angle_degrees, mode="soft_transition"):
     """Video-only 2D deformation with a broad neck transition.
 
     The app's fast preview uses a compact transition, which is useful for
@@ -37,19 +70,7 @@ def video_soft_bend_2d(image, angle_degrees):
     pivot_x = int(width * 0.55)
     pivot_y = int(height * 0.62)
 
-    # Broad transition: nearly full motion for head/upper C-spine, then a long
+    weight = video_motion_weight(height, width, mode)
-    # smooth blend through the lower C-spine to avoid splitting bone structures.
-    full_motion_y = height * 0.50
-    fixed_y = height * 0.92
-    t = np.clip((yy - full_motion_y) / (fixed_y - full_motion_y), 0, 1)
-    weight = 1 - (t * t * (3 - 2 * t))
-
-    # A small x-dependent term keeps the posterior contour from looking like a
-    # straight sliced plane while remaining deterministic and smooth.
-    x_soft = np.clip((xx - width * 0.15) / (width * 0.75), 0, 1)
-    x_soft = x_soft * x_soft * (3 - 2 * x_soft)
-    weight = np.clip(weight * (0.90 + 0.10 * x_soft), 0, 1)
-
     theta = np.deg2rad(angle_degrees) * weight
     cos_t = np.cos(theta)
     sin_t = np.sin(theta)
@@ -74,8 +95,9 @@ def smoothstep(t):
     return t * t * (3 - 2 * t)
 
 
-def make_frame(before_image, angle, max_angle, show_arrow=True):
+def make_frame(before_image, angle, max_angle, show_arrow=True, mode="soft_transition"):
-    after_image = video_soft_bend_2d(before_image, angle)
+    mode = normalize_mode(mode)
+    after_image = video_soft_bend_2d(before_image, angle, mode)
 
     frame = Image.new("RGB", (1920, 1080), (0, 0, 0))
     draw = ImageDraw.Draw(frame)
@@ -90,7 +112,7 @@ def make_frame(before_image, angle, max_angle, show_arrow=True):
     draw.text((135, 120), "Original: 0 deg", font=title_font, fill=(255, 255, 255))
     draw.text(
         (1055, 120),
-        f"Head extension: {angle:04.1f} deg",
+        f"{MODE_LABELS[mode]}: {angle:04.1f} deg",
         font=title_font,
         fill=(255, 255, 255),
     )
@@ -101,22 +123,6 @@ def make_frame(before_image, angle, max_angle, show_arrow=True):
         draw.line((x0, y0, x1, y1), fill=arrow, width=8)
         draw.polygon([(x1, y1), (x1 - 34, y1 + 3), (x1 - 12, y1 + 29)], fill=arrow)
 
-    # Minimal progress bar.
-    bar_x, bar_y, bar_w, bar_h = 1040, 980, 760, 12
-    draw.rounded_rectangle(
-        (bar_x, bar_y, bar_x + bar_w, bar_y + bar_h),
-        radius=6,
-        fill=(70, 70, 70),
-    )
-    fill_w = int(bar_w * angle / max_angle) if max_angle else 0
-    draw.rounded_rectangle(
-        (bar_x, bar_y, bar_x + fill_w, bar_y + bar_h),
-        radius=6,
-        fill=arrow,
-    )
-    draw.text((1040, 1000), "0 deg", font=get_font(24), fill=(210, 210, 210))
-    draw.text((1745, 1000), f"{max_angle:g} deg", font=get_font(24), fill=(210, 210, 210))
-
     # Invisible-looking spacer: keeps the font imported above alive for some PIL builds.
     _ = angle_font
     return frame
@@ -153,10 +159,17 @@ def parse_args():
         action="store_true",
         help="Hide the yellow direction arrow.",
     )
+    parser.add_argument(
+        "--mode",
+        default="soft_transition",
+        choices=["hard_boundary", "gaussian_smooth", "soft_transition"],
+        help="2D video deformation mode. Default: soft_transition",
+    )
     return parser.parse_args()
 
 
-def generate_video(input_dir, output_path, max_angle=20.0, duration_seconds=6.0, show_arrow=True):
+def generate_video(input_dir, output_path, max_angle=20.0, duration_seconds=6.0, show_arrow=True, mode="soft_transition"):
+    mode = normalize_mode(mode)
     output_file = Path(output_path)
     output_file.parent.mkdir(parents=True, exist_ok=True)
 
@@ -177,17 +190,17 @@ def generate_video(input_dir, output_path, max_angle=20.0, duration_seconds=6.0,
         for index in range(moving_frames):
             t = index / (moving_frames - 1)
             angle = max_angle * smoothstep(t)
-            writer.append_data(np.asarray(make_frame(before_image, angle, max_angle, show_arrow)))
+            writer.append_data(np.asarray(make_frame(before_image, angle, max_angle, show_arrow, mode)))
 
         for _ in range(hold_frames):
-            writer.append_data(np.asarray(make_frame(before_image, max_angle, max_angle, show_arrow)))
+            writer.append_data(np.asarray(make_frame(before_image, max_angle, max_angle, show_arrow, mode)))
 
     return output_file.resolve()
 
 
 def main():
     args = parse_args()
-    output_file = generate_video(args.input, args.output, args.max_angle, args.duration, not args.no_arrow)
+    output_file = generate_video(args.input, args.output, args.max_angle, args.duration, not args.no_arrow, args.mode)
     print(output_file)
 
 

head_extension_app.py

@@ -152,7 +152,37 @@ def fit_image(image, width, height):
     return canvas
 
 
-def preview_deform_2d(image, angle_degrees):
+def preview_motion_weight(height, width, mode="soft_transition", transition_width=90, gaussian_sigma=3):
+    yy, xx = np.mgrid[0:height, 0:width]
+    boundary_y = height * 0.71
+    transition_span = height * np.clip(float(transition_width) / 90 * 0.42, 0.18, 0.56)
+    full_motion_y = boundary_y - transition_span * 0.5
+    fixed_y = boundary_y + transition_span * 0.5
+
+    if mode == "hard_boundary":
+        return (yy <= boundary_y).astype(np.float32)
+
+    if mode == "gaussian_smooth":
+        try:
+            from scipy.ndimage import gaussian_filter
+        except Exception:
+            gaussian_filter = None
+
+        hard = (yy <= boundary_y).astype(np.float32)
+        if gaussian_filter is None:
+            return hard
+        sigma = float(np.clip(float(gaussian_sigma), 1, 12))
+        return np.clip(gaussian_filter(hard, sigma=sigma), 0, 1).astype(np.float32)
+
+    t = np.clip((yy - full_motion_y) / (fixed_y - full_motion_y), 0, 1)
+    weight = 1 - (t * t * (3 - 2 * t))
+
+    x_soft = np.clip((xx - width * 0.15) / (width * 0.75), 0, 1)
+    x_soft = x_soft * x_soft * (3 - 2 * x_soft)
+    return np.clip(weight * (0.90 + 0.10 * x_soft), 0, 1).astype(np.float32)
+
+
+def preview_deform_2d(image, angle_degrees, mode="soft_transition", transition_width=90, gaussian_sigma=3):
     """Fast visual preview only. The DICOM output uses the real 3D field."""
     try:
         from scipy.ndimage import map_coordinates
@@ -166,15 +196,7 @@ def preview_deform_2d(image, angle_degrees):
     pivot_x = int(w * 0.55)
     pivot_y = int(h * 0.62)
 
-    full_motion_y = h * 0.50
+    weight = preview_motion_weight(h, w, mode, transition_width, gaussian_sigma)
-    fixed_y = h * 0.92
-    t = np.clip((yy - full_motion_y) / (fixed_y - full_motion_y), 0, 1)
-    weight = 1 - (t * t * (3 - 2 * t))
-
-    x_soft = np.clip((xx - w * 0.15) / (w * 0.75), 0, 1)
-    x_soft = x_soft * x_soft * (3 - 2 * x_soft)
-    weight = np.clip(weight * (0.90 + 0.10 * x_soft), 0, 1)
-
     theta = np.deg2rad(angle_degrees) * weight
     cos_t = np.cos(theta)
     sin_t = np.sin(theta)
@@ -359,7 +381,7 @@ def run_deformation(input_dir, output_dir, angle_degrees, transition_width, prog
     output_paths["legacy_soft"] = legacy_soft_dir
 
     progress("正在生成四状态过程对比图...")
-    preview_paths = make_four_state_preview(state_images, Path(output_dir), angle_degrees)
+    preview_paths = make_four_state_preview(state_images, Path(output_dir), angle_degrees, transition_width=transition_width)
     make_output_preview_from_images(
         state_images["original"],
         state_images["soft_transition"],
@@ -437,14 +459,32 @@ def make_output_preview_from_images(original_image, deformed_image, output_dir,
     return preview_path
 
 
-def make_four_state_preview(state_images, output_dir, angle_degrees, coordinates_cutoff=None):
+def make_four_state_preview(state_images, output_dir, angle_degrees, coordinates_cutoff=None, transition_width=90):
     output_dir = Path(output_dir)
     screenshot_dir = output_dir / "process_screenshots"
     reset_folder(screenshot_dir)
 
+    original_panel = sitk_sagittal_panel(state_images["original"], coordinates_cutoff)
+    preview_panels = {
+        "original": original_panel,
+        "hard_boundary": preview_deform_2d(original_panel, angle_degrees, "hard_boundary"),
+        "gaussian_smooth": preview_deform_2d(
+            original_panel,
+            angle_degrees,
+            "gaussian_smooth",
+            transition_width,
+        ),
+        "soft_transition": preview_deform_2d(
+            original_panel,
+            angle_degrees,
+            "soft_transition",
+            transition_width,
+        ),
+    }
+
     panels = []
     for state_key, label, _ in STATE_LABELS:
-        panel = sitk_sagittal_panel(state_images[state_key], coordinates_cutoff)
+        panel = preview_panels[state_key]
         panel_path = screenshot_dir / f"{state_key}.png"
         panel.save(panel_path, quality=95)
         panels.append((label, panel))
@@ -517,7 +557,7 @@ class HeadExtensionApp:
         self.angle = Scale(
             controls,
             from_=0,
-            to=20,
+            to=45,
             orient=HORIZONTAL,
             resolution=0.5,
             length=420,
@@ -603,7 +643,12 @@ class HeadExtensionApp:
                 self.cached_volume = load_dicom_volume(self.input_dir.get())
             before = crop_head_neck(sagittal_mip(self.cached_volume))
             before_with_line = draw_cutoff_line(before, self.cached_volume.shape[0])
-            after = preview_deform_2d(before_with_line, float(self.angle.get()))
+            after = preview_deform_2d(
+                before_with_line,
+                float(self.angle.get()),
+                transition_width=float(self.transition.get()),
+                gaussian_sigma=3,
+            )
 
             canvas = Image.new("RGB", (1120, 610), (0, 0, 0))
             draw = ImageDraw.Draw(canvas)

video_generator_app.py

@@ -51,7 +51,7 @@ class VideoGeneratorApp:
         self.max_angle = Scale(
             controls,
             from_=5,
-            to=30,
+            to=45,
             orient=HORIZONTAL,
             resolution=1,
             length=360,

web_backend.py

@@ -360,6 +360,91 @@ def add_dicom_from_zip(target_dir, zip_filename, payload, start_index):
     return count
 
 
+def validate_single_dicom_series(dicom_dir):
+    series_counts = {}
+    for dicom_path in Path(dicom_dir).glob("*.dcm"):
+        try:
+            ds = pydicom.dcmread(str(dicom_path), stop_before_pixels=True, force=True)
+        except Exception as exc:
+            raise RuntimeError(f"{dicom_path.name} 不是可读取的 DICOM 文件。") from exc
+        series_uid = str(getattr(ds, "SeriesInstanceUID", "") or "NO_SERIES_UID")
+        series_counts[series_uid] = series_counts.get(series_uid, 0) + 1
+
+    if len(series_counts) > 1:
+        series_summary = ", ".join(str(count) for count in sorted(series_counts.values(), reverse=True))
+        raise RuntimeError(
+            "上传内容包含多个 DICOM 序列，不能作为一个影像库数据集导入。"
+            f"检测到 {len(series_counts)} 个序列，分别约 {series_summary} 张。"
+            "请上传单个序列文件夹/ZIP。"
+        )
+
+
+def reset_demo_environment():
+    source_dir = APP_DIR / "Ori_Head_CT"
+    source_zip = APP_DIR / "Ori_Head_CT.zip"
+    demo_root = LIBRARY_DIR / "demo_ori_head_ct"
+    demo_dicom_dir = demo_root / "dicom"
+
+    if not source_dir.exists() and not source_zip.exists():
+        raise RuntimeError("未找到 Ori_Head_CT 或 Ori_Head_CT.zip，无法恢复演示环境。")
+
+    safe_mkdir(LIBRARY_DIR)
+    for child in LIBRARY_DIR.iterdir():
+        if child.is_dir():
+            shutil.rmtree(child)
+        else:
+            child.unlink()
+
+    safe_mkdir(demo_dicom_dir)
+    copied = 0
+    if source_dir.exists():
+        for dicom_path in sorted(source_dir.glob("*.dcm")):
+            shutil.copy2(dicom_path, demo_dicom_dir / dicom_path.name)
+            copied += 1
+    else:
+        with zipfile.ZipFile(source_zip) as archive:
+            for member in archive.infolist():
+                if member.is_dir():
+                    continue
+                member_name = member.filename.replace("\\", "/")
+                if Path(member_name).suffix.lower() != ".dcm":
+                    continue
+                if Path(member_name).is_absolute() or ".." in Path(member_name).parts:
+                    continue
+                copied += 1
+                with archive.open(member) as member_file:
+                    write_dicom_payload(demo_dicom_dir, Path(member_name).name, member_file.read(), copied)
+
+    if copied == 0:
+        shutil.rmtree(demo_root)
+        raise RuntimeError("Ori_Head_CT 中没有找到 .dcm 文件。")
+
+    validate_single_dicom_series(demo_dicom_dir)
+    record = build_library_record(
+        "demo_ori_head_ct",
+        "Ori_Head_CT",
+        demo_dicom_dir,
+        source="upload",
+        version="DICOM-DEMO",
+    )
+    write_library_meta([record])
+    DICOM_FILE_CACHE.clear()
+
+    if RESULT_DIR.exists():
+        shutil.rmtree(RESULT_DIR)
+    safe_mkdir(RESULT_DIR)
+    with JOBS_LOCK:
+        JOBS.clear()
+        persist_jobs_locked()
+    write_json_file(USER_TASKS_META, {})
+
+    return {
+        "ok": True,
+        "message": "演示环境已恢复出厂设置。",
+        "items": list_library(),
+    }
+
+
 def upload_library_item(headers, body):
     fields, files = parse_multipart(headers, body)
     dicom_files = [
@@ -398,6 +483,11 @@ def upload_library_item(headers, body):
     if total_dicom_count == 0:
         shutil.rmtree(target_dir.parent)
         raise RuntimeError("压缩包里没有找到 .dcm 文件。")
+    try:
+        validate_single_dicom_series(target_dir)
+    except Exception:
+        shutil.rmtree(target_dir.parent)
+        raise
 
     record = build_library_record(
         item_id,
@@ -547,11 +637,26 @@ def start_job(kind, worker, owner=None, params=None, remember_user_task=True):
     return get_job(job_id)
 
 
-def make_preview(input_dir, angle_degrees, show_cutoff_line=True):
+def make_preview(
+    input_dir,
+    angle_degrees,
+    show_cutoff_line=True,
+    transition_width=90,
+    mode="soft_transition",
+    gaussian_sigma=3,
+):
+    if mode not in {"hard_boundary", "gaussian_smooth", "soft_transition"}:
+        mode = "soft_transition"
     volume = load_dicom_volume(input_dir)
     before = crop_head_neck(sagittal_mip(volume))
     before_display = draw_cutoff_line(before, volume.shape[0]) if show_cutoff_line else before
-    after = preview_deform_2d(before_display, float(angle_degrees))
+    after = preview_deform_2d(
+        before_display,
+        float(angle_degrees),
+        mode,
+        transition_width=float(transition_width),
+        gaussian_sigma=float(gaussian_sigma),
+    )
 
     canvas_image = Image.new("RGB", (1440, 520), (0, 0, 0))
     canvas_image.paste(fit_image(before_display, 700, 520), (0, 0))
@@ -779,12 +884,19 @@ class Handler(BaseHTTPRequestHandler):
                 return
 
             body = self.read_json()
+            if parsed.path == "/api/demo/reset":
+                self.send_json(reset_demo_environment())
+                return
+
             if parsed.path == "/api/preview":
                 self.send_json(
                     make_preview(
                         body["inputDir"],
                         body.get("angleDegrees", 12),
                         bool(body.get("showCutoffLine", True)),
+                        body.get("transitionWidth", 90),
+                        body.get("mode", "soft_transition"),
+                        body.get("gaussianSigma", 3),
                     )
                 )
                 return
@@ -865,13 +977,16 @@ class Handler(BaseHTTPRequestHandler):
                 max_angle = float(body.get("maxAngle", 20))
                 duration = float(body.get("durationSeconds", 6))
                 show_arrow = bool(body.get("showArrow", True))
+                mode = body.get("mode", "hard_boundary")
+                if mode not in {"hard_boundary", "gaussian_smooth", "soft_transition"}:
+                    mode = "hard_boundary"
 
                 def worker(job_id):
                     job_root = RESULT_DIR / job_id
                     reset_dir(job_root)
-                    output_file = job_root / f"head_extension_{job_id}.mp4"
+                    output_file = job_root / f"head_extension_{mode}_{job_id}.mp4"
-                    set_job(job_id, message="正在生成 0° 到目标角度的视频。")
+                    set_job(job_id, message=f"正在生成 {mode} 视频。")
-                    output = generate_video(input_dir, output_file, max_angle, duration, show_arrow)
+                    output = generate_video(input_dir, output_file, max_angle, duration, show_arrow, mode)
                     output = Path(output).resolve()
                     return {
                         "video": {