The present disclosure relates to an image capturing element, an image capturing device, and a method that are capable of preventing a reduction in communication safety.
By capturing an image of a subject, and generating a captured image, a predetermined feature amount to be output to the outside is extracted from the generated captured image. For example, an image capturing section that captures an image of a subject to generate a captured image, and a feature amount extracting section that extracts, from the captured image generated by the image capturing section, a predetermined feature amount to be output to the outside, are packaged and are formed in respective substrates different from each other. The present disclosure can be applied to, for example, an image capturing element, an image capturing device, an image processing device, a transmission device, or a communication device.