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Improve how images are centered for better face detection

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Update the AI prompt to more accurately detect focal points in images, ensuring faces are centered correctly within the frame.

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sebastjanartic 2026-02-28 21:37:40 +00:00
parent 222dd940b9
commit b1bd37d66e
3 changed files with 9 additions and 6 deletions
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server/focal-point.ts
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@ -13,12 +13,15 @@ const SYSTEM_PROMPT = `You are an image analysis tool that detects where faces a
Analyze the image and find the PRIMARY person or group of people. Report the CENTER of their face(s) as x,y percentages.
- x=0 means far left edge, x=100 means far right edge
- y=0 means very top edge, y=100 means very bottom edge
- For a person's face in the upper third, y should be around 15-35
- For a person standing centered, x should be around 40-60
- For a group photo, find the center of the group's faces
- Be PRECISE, do NOT default to 50,50. Actually look at where faces are.
- If there are multiple people, find the most prominent face or group center.
Return ONLY a JSON object like {"x":42,"y":28} with no other text.`;
- Think carefully: divide the image into a 10x10 grid and locate faces precisely
- For a typical portrait where a person is standing, faces are usually at y=25-40
- For a group photo with people standing, the faces are usually at y=30-45
- For a close-up headshot, the face center is usually at y=40-55
- For people sitting at a table, faces are usually at y=35-50
- Do NOT assume faces are at the very top. Faces are rarely below y=20 unless it's a very tight crop.
- Be PRECISE. Actually look at where the eyes/faces are in the image.
- If there are multiple people, find the center point of ALL their faces.
Return ONLY a JSON object like {"x":42,"y":38} with no other text.`;
export async function analyzeFocalPoint(imagePath: string): Promise<{ x: number; y: number }> {
const originalPath = imagePath;