HIKVISION iDS-9632NXI-I8/16S User Manual page 167

 You can upload one picture each time.
 When there are multiple targets existing in the same picture, up to 30 target pictures can
be analyzed and displayed. And up to 5 targets are supported for local search
simultaneously and 1 target for remote search by client software.
 The maximum allowed picture size is 3840*2160.
 The picture must be in JPG/jpg/JPEG/jpeg format.
 The picture name (with the suffix) cannot exceed 64 characters.
 Make sure the picture you uploaded is clear and recognizable.
Step 4 On the Human Body Search interface, set the similarity value from 1 to 100.
Network Video Recorder User Manual
Figure 12-5 Upload Picture for Search
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