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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. 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 - x=0 means far left edge, x=100 means far right edge
- y=0 means very top edge, y=100 means very bottom 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 - Think carefully: divide the image into a 10x10 grid and locate faces precisely
- For a person standing centered, x should be around 40-60 - For a typical portrait where a person is standing, faces are usually at y=25-40
- For a group photo, find the center of the group's faces - For a group photo with people standing, the faces are usually at y=30-45
- Be PRECISE, do NOT default to 50,50. Actually look at where faces are. - For a close-up headshot, the face center is usually at y=40-55
- If there are multiple people, find the most prominent face or group center. - For people sitting at a table, faces are usually at y=35-50
Return ONLY a JSON object like {"x":42,"y":28} with no other text.`; - 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 }> { export async function analyzeFocalPoint(imagePath: string): Promise<{ x: number; y: number }> {
const originalPath = imagePath; const originalPath = imagePath;