{"slug":"visionflow-match-saastemly-com-v1-feature-match-2730b7","title":"Match local features between a pattern image and a larger image","host":"visionflow-match.saastemly.com","method":"POST","resource":"https://visionflow-match.saastemly.com/v1/feature-match","category":"image","description":"Match local features between a pattern image and a larger image: detects ORB or SIFT keypoints in both, matches them with a brute-force matcher and Lowe's ratio test (OpenCV BFMatcher.knnMatch), and returns the good matches as point pairs sorted by distance. Use it to see which parts of a pattern 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,"ratio":0.75,"template":"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"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"detector":{"description":"Keypoint detector and descriptor: orb (default, fast, binary descriptors, Hamming distance) or sift (slower, better with scale changes, L2 distance)","enum":["orb","sift"],"type":"string"},"image":{"description":"Base64 of a PNG, JPEG, BMP or WebP file (a data: URI also works). At most 4 million pixels and about 2 MB. Alpha is dropped.","type":"string"},"max_features":{"description":"Most keypoints kept per image, 100-5000 (default 2000)","type":"integer"},"max_matches":{"description":"Most matches listed, 1-200 (default 50); goodMatches always counts all of them","type":"integer"},"ratio":{"description":"Lowe's ratio test threshold, 0.5-0.95 (default 0.75): a match is kept when its distance is below ratio times the second-best distance","type":"number"},"template":{"description":"Base64 of the pattern to find, same formats. At most 1 million pixels and about 1 MB.","type":"string"}},"required":["image","template"]},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-03","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.004,"price_match":true,"latency_ms":374,"error":null}],"description_full":"Match local features between a pattern image and a larger image: detects ORB or SIFT keypoints in both, matches them with a brute-force matcher and Lowe's ratio test (OpenCV BFMatcher.knnMatch), and returns the good matches as point pairs sorted by distance. Use it to see which parts of a pattern are present and where, even when the pattern is scaled or rotated; for the pattern's outline use /v1/homography.","last_updated":"2026-10-03T13:57:26.546Z","schemes":["exact"]}