Distinct from palm vascular
Palmprint uses visible palm-surface ridge/line/texture information, while palm vascular uses subcutaneous vascular patterns with different sensing/illumination. The modalities are not described with a shared template.
BIOMETRIC SCIENCE
Palmprint — ridges, creases and palm texture
Palmprint is treated as a separate surface-image modality using ridge, crease and texture information, quality control, representation and matching. It is not palm-vein.
SOURCEAuthoritative / document
CAPTUREDevice / SDK
VERIFYDocument + biometric
ASSUREPolicy + risk
DECIDEClaims / status
EVIDENCEAudit / trace
TECHNICAL REFERENCE
Palmprint: palm-surface imagery and region-of-interest features
Palm image → ROI/quality → feature/template → matching → decision
Capture geometry
Palm orientation, distance, ROI and full/partial capture affect segmentation and quality. Current documentation publishes no specific geometry without a device/test source.
ROI and quality
Quality should consider usable palm region, blur, perspective and occlusion according to the engine rather than copying face/fingerprint criteria.
Enrollment and match
Enrollment binds palm samples/templates to a subject; verification/search behavior must follow the actual matcher/process.
Device dependency
Camera/sensor, driver and illumination form part of the tested profile. Datasheet capability is not equivalent to CheckID-tested compatibility.
Failure and evidence
Incomplete palm region, poor perspective/blur, failed segmentation, missing enrollment and low match outcomes should remain distinct where the implementation exposes them.