feat(v2): add fall event regression engine

v2/cmd/spike/main.go

@@ -8,6 +8,7 @@ import (
 	"os/exec"
 	"time"
 
+	"silverpose/v2/internal/pose"
 	"silverpose/v2/internal/spike"
 )
 
@@ -41,7 +42,7 @@ func main() {
 		fail("decoded BGR frame has %d bytes, want %d; verify --width/--height", len(raw), expectedBytes)
 	}
 
-	input, err := spike.LetterboxBGRToNCHW(raw, *width, *height, 640)
+	input, transform, err := pose.PreprocessBGR(raw, *width, *height, 640)
 	if err != nil {
 		fail("preprocess frame: %v", err)
 	}
@@ -49,6 +50,10 @@ func main() {
 	if err != nil {
 		fail("run ONNX Pose: %v", err)
 	}
+	people, err := pose.ParseYOLOv8Pose(output, transform, 0.25, 0.70)
+	if err != nil {
+		fail("parse ONNX Pose: %v", err)
+	}
 
 	max := float32(0)
 	for _, value := range output {
@@ -56,7 +61,10 @@ func main() {
 			max = value
 		}
 	}
-	fmt.Printf("SPIKE_OK frame=%dx%d input=%d output=%d max=%.4f\n", *width, *height, len(input), len(output), max)
+	fmt.Printf("SPIKE_OK frame=%dx%d input=%d output=%d people=%d max=%.4f\n", *width, *height, len(input), len(output), len(people), max)
+	for index, person := range people {
+		fmt.Printf("PERSON index=%d conf=%.6f box=%.3f,%.3f,%.3f,%.3f\n", index, person.Confidence, person.Box.Left, person.Box.Top, person.Box.Right, person.Box.Bottom)
+	}
 }
 
 func fail(format string, args ...any) {