| Term | Description |
| Sample | A set of processing input/output data. Image API processing services receive samples with input data and return the processing result also generated as a sample. In Image API, the sample to be processed should contain an image in base64. |
| Object attributes (objects: faces and bodies) | Gender, age, emotions, anthropometric points, liveness, medical face masks. |
| Face verification | Comparison of two face images to verify whether they belong to the same person (1:1). |
| Biometric template | A unique set of biometric features extracted from a face image. Templates are used to compare two face images and determine a degree of their similarity. |