1import { fal } from "@fal-ai/client";
2
3// Detect focal point
4const result = await fal.subscribe("fal-ai/moondream3-preview/point", {
5  input: {
6    image_url: "https://example.com/your-image.jpg",
7    prompt: "focal point",
8  },
9  logs: true,
10  onQueueUpdate: (update) => {
11    if (update.status === "IN_PROGRESS") {
12      update.logs.map((log) => log.message).forEach(console.log);
13    }
14  },
15});
16
17// Get focal point coordinates (normalized 0-1)
18const focalPoint = result.data.points[0];
19console.log(`Focal point: x=${focalPoint.x}, y=${focalPoint.y}`);
20
21// Calculate crop area centered on focal point
22function calculateCrop(imageWidth, imageHeight, focalX, focalY, aspectRatio) {
23  const [ratioW, ratioH] = aspectRatio.split(":").map(Number);
24  const targetAspect = ratioW / ratioH;
25  const imageAspect = imageWidth / imageHeight;
26
27  let cropWidth, cropHeight;
28  if (imageAspect > targetAspect) {
29    cropHeight = imageHeight;
30    cropWidth = cropHeight * targetAspect;
31  } else {
32    cropWidth = imageWidth;
33    cropHeight = cropWidth / targetAspect;
34  }
35
36  let cropX = focalX * imageWidth - cropWidth / 2;
37  let cropY = focalY * imageHeight - cropHeight / 2;
38
39  cropX = Math.max(0, Math.min(cropX, imageWidth - cropWidth));
40  cropY = Math.max(0, Math.min(cropY, imageHeight - cropHeight));
41
42  return { x: cropX, y: cropY, width: cropWidth, height: cropHeight };
43}
44
45const crop = calculateCrop(1920, 1080, focalPoint.x, focalPoint.y, "1:1");