16. A nontransitory computer readable medium having stored thereon instructions for: generating one or more video-based automated tests that are based on at least two properties of human vision comprising at least persistence of vision and simultaneous contrast wherein simultaneous contrast comprises enhancement or diminishment, relative to normal, of perception, cognition and related performance as a result of immediately previous or simultaneous exposure to a stimulus of lesser or greater value in the same dimension generating a video of a target image comprising text data of one or more of randomly selected letters or meaningful words; segmenting the target image into a grid of segments of predetermined sizes; splitting the grid of segments across a plurality of framesets such that occurrence rates of the positive data comprising the target image or the text data and negative data including the whitespace data is the same; receiving a response to the one or more tests; and verifying that the response is from a human user.
16. A nontransitory computer readable medium having stored thereon instructions for: generating one or more video-based automated tests that are based on at least two properties of human vision comprising at least persistence of vision and simultaneous contrast wherein simultaneous contrast comprises enhancement or diminishment, relative to normal, of perception, cognition and related performance as a result of immediately previous or simultaneous exposure to a stimulus of lesser or greater value in the same dimension generating a video of a target image comprising text data of one or more of randomly selected letters or meaningful words; segmenting the target image into a grid of segments of predetermined sizes; splitting the grid of segments across a plurality of framesets such that occurrence rates of the positive data comprising the target image or the text data and negative data including the whitespace data is the same; receiving a response to the one or more tests; and verifying that the response is from a human user. 21. The computer readable medium of claim 16 , further comprising instructions for adding a noise component to each segment in a deterministic way which leads to reduced visibility of the text in each frame, but identifiable by a human user when combined in a frameset and shown as a video CAPTCHA.