feat: add physically explicit narrowband MUSIC

2026-08-29 12:40:48 +09:00
parent 044be3cf92
commit 11fee76280
40 changed files with 6473 additions and 275 deletions
@@ -1,3 +1,5 @@
+import { normalizedMusicPseudospectrum } from "/packages/acoustics-core/evaluation.js";
+
 const DEFAULT_BACKGROUND = "#07110f";
 const DEFAULT_DYNAMIC_RANGE_DB = 48;
 const MAX_PIXEL_RATIO = 3;
@@ -269,11 +271,36 @@ function resolveBandMap(band, scan) {
  const rows = map.rows ?? scan.rows;
  const columns = map.columns ?? scan.columns;
  if (rows !== scan.rows || columns !== scan.columns || values.length !== rows * columns) return null;
+  const scale = map.scale ?? band.displayScale ?? band.rawScale ?? "power";
+  const objectiveDirection =
+    map.objectiveDirection ??
+    band.objectiveDirection ??
+    (scale === "noise-projection" ? "minimum" : "maximum");
+  if (objectiveDirection === "minimum") {
+    let pseudospectrum;
+    try {
+      pseudospectrum = normalizedMusicPseudospectrum(values);
+    } catch {
+      return null;
+    }
+    return {
+      values: pseudospectrum.values,
+      rows,
+      columns,
+      scale: "score",
+      sourceScale: scale,
+      objectiveDirection,
+      displayTransform: pseudospectrum.transform,
+    };
+  }
  return {
    values,
    rows,
    columns,
-    scale: map.scale ?? band.displayScale ?? "power",
+    scale,
+    sourceScale: scale,
+    objectiveDirection,
+    displayTransform: "identity",
  };
 }