I'm just conducting a research. Is it possible to create a round shape on screen that can be invisible or not seen by human eye,which can be seen by software that perform something like bio-metric reading/face detector. Its can not be only a shape even if its some sort of light/image that is impossible for a human to see but possible to software doing similar as face detection?
If this is possible how could one go about doing this and what this form is called and also if any knows samples, documentation about this.
I know this maybe a complex question but as I've said I'm conducting a research on this.