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Porn-Detection Software for Videos & Images

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Woman Nudity-Detection Software: PNWatch

The image understanding software publisher, Yang's Scientific Research Institute, LLC. (Yang's), is beta-testing pornography detection software PNWatch--based on its unique Physical Linguistic Vision technologies--that uncovers online porn by scanning photographs for objectionable contents such as naked breasts to detect nudity. Unlike filtering products that look at HTML ( hypertext markup language) or scan images only for tones of flesh and curves, Yang's new image-understanding software “sees” the contents of pictures and determines whether they are pornographic in nature. Since many natural scenes such as the sky at sun set are of tones of flesh and many pornographic pictures are not in color, it is not robust at all to use tones of flesh and curves to make the judgments. “Only when some objectionable contents appear on the pictures that we can categorize them into pornography, otherwise, many innocent pictures might be blocked mistakenly,” Yang's Chief Scientist Tao Yang told the press. (December 02, 2005, Tucson, Arizona, USA.)
1. Download the free software for detecting porn in video.
2. Develop your own primary porno detection software for both image and video. from our open source project
3. How do other porno detection software work?
4. Training your own pornography filter using our comprehensive labeled training dataset(on sale): click here to see the samples of the porno feature training image database.

Professional version of our porn-detection software & SDK, click [here]


PNWatch is now a part of PornSeer Pro--the world's first effective & real-time video porn detector.
PNWatch is now a part of PornDel--the commercial software based on PornSeer Pro. SDK..

Yang's porn-detection software, the PNWatch, can see the objectionable contents from pornographic pictures, therefore, it can block the exact areas where the objectionable contents located without hurting other areas that in sometimes are not objectionable at all. Here are some examples of the processed results of some pornographic pictures where the regions of exposed breasts were detected and blocked by Yang's porn-detection software, the PNWatch. (In these pictures, the red rectangles were generated by the breast-locating module in the Cognitive Image Search Engine developed in Yang's, the white patches were generated by post-processing software. )

PNWatch consists and will consist of the following detectors each of which is used to detecting one feature of human naked body.
•    Woman breast/nipple-detecting component called breast detector.
•    Vulva-detecting component called vulva detector, or, pussy detector
•    Pubic Region-detecting component called pubic hair detector, or, pubic region detector
•    Oral sex-detecting component called oral sex detector, fellatio detector, cunnilingus detector, or, blowjob detector
•    Anus-detecting component called anus detector, or, asshole detector
•    Penis-detecting component called penis detector, or, dick detector
•    Vulva-hand-detecting component called vulva-hand detector, or, hand-touch-pussy detector
•    Sex-position-detecting component consisting of:
1. Missionary, Side entry missionary,
2. Squashing of the deckchair,
2. Peace Sign,
2. Butterfly position,
2. Coital alignment technique,
2. The stopperage,
2. The Yawning Position,
2. Octopus Position,
2. Feet-on-his-shoulders,
2. Doggy, Leapfrog, Froggy, Upright doggy, Spread-eagle, Spoons position, Reverse peace sign, Chambers Fuck, Fraser Mackenzie, Inverted Missionary,
2. Cowgirl sex position/Amazon position, Reverse Cowgirl/Reverse Amazon, Reverse Cowgirl Horizontal, Asian Cowgirl,
2. Horizontal reverse, Armchair, Black bee, Persuading of the debtor, Playing of the cello, Proposal, Split level, Watching the game, Reverse piggy-back, Stand and carry, Standing, Wheelbarrow, etc. It is called intercourse detector, or fuck detector.

The following pictures are generated by breast-detecting components (the breast detector) in the PNWatch package. For the results generated from other components, please visit the links listed above. Please note that since every components are under extensive and active development all over the time, the detecting ability of each component will be enhanced generation by generation.

These software packages are a part of the Cognitive Image/Video Search Engine developed in Yang’s Scientific Research Institute, L.L.C., U.S.A.

Cognitive image/video understanding packages, which have been developing in Yang’s Scientific Research Institute, L.L.C., U.S.A., is part of the operating system for personalized services in the coming industrial revolution known as cognitive industry. To incubate the cognitive industry, the personal robots will play the same roles that computers had played in information age while the theory of a measureable cognition will play the role of the fundamental theory. To make cognition measurable is the precondition of making cognition computable.
Yet, it is very challenge to make cognition measurable because it will need scientists to make cognition a subject of natural sciences rather than social sciences. The first step to make cognition measurable is to make human languages, known as natural languages, measurable. To make natural languages measurable we first need to make them physical. Therefore, we need to change the linguistics, which is now mainly studied as a subject of social sciences, into physical linguistics, which is the counterpart of linguistics in the framework of natural sciences.
In physical linguistics, computational nouns are used to make nouns measureable while computational verbs are used to make verbs measurable. Computational nouns are made measurable via modeling their attribute values using probability, Boolean logic and fuzzy logic. Computational verbs are made measurable via modeling their dynamics using computational verb theory. The International Journal of Computational Cognition is an academic journal dedicated to these topics.

Commercial Applications

Porn filter is only the tip of an iceberg of commercial applications of PL image/video understanding technology, which has been used to implement video surveillance system, video flame detecting system, video intelligent transportation system (ITS), video card counter, stock data analysis, image search engine, natural language interface to game engine, cellular phone camera applications, dense fog penetration, CCTV camera night vision, webcam face login, webcam visual mouse, shadow detection and removal, vehicle categorization, very blur scratch detection, and many others.
Many SDK's are available for software programmers to program their own image/video applications based on this exciting new technology.

Academic Values

This detector is one member of a family of detectors for detecting human body from images and video streams. It is designed based on the computational verb theory, which was invented in the Department of Electrical Engineering and Computer Sciences, University of California at Berkeley in 1997 by Professor Tao Yang when he visited UCB as a visiting scholar. This theory was addressed in many academic papers and a comprehensive text book entitled: “The Mathematical Principles of Natural Languages: The First Course in Physical Linguistics.


This webpage is a scientific research report designed to detect and display adult material which may be considered offensive. Please be sure that you could be exposed to material of an explicit nature. All pictures followed are partially nude with objectionable contents blocked in white. To continue, please scroll down. Otherwise, close this page right now.

In the following detecting result, a belly-button and its surrounding area was mistakenly detected as a breast because the software still doesn’t has the ability to distinguish convex objects from concave objects from the shadow patterns.

In the following detecting result, the left breast was not detected because the distortion and the coverage.

If only tones of flesh and curves were used, this picture might be categorized as pornography, Yang’s porn-detection software issued no false-alarm.

Failed to detect the right breast from the mirror because the breast-locating module in the Cognitive Image Search Engine didn’t learn that ability yet. However, this ability can be developed easily. Observe that this software can detect the illicit images in gray-scale as well as in color.

Failed to detect the left breast because the breast-locating module in the Cognitive Image Search Engine didn’t learn that ability yet. However, this ability can be developed easily.

Pubic Hair & Region Detection
Porno in Video: All green blocks were generated automatically by PNWatch DLL. A red cross on the frame indicates that at least one porn content detected in this frame.

Oral Sex Detection, Blowjob Detection, Fellatio Detection

Anus Detection

Vulva-hand Detection, Hand-Touch-Pussy Detector

Cowgirl Sex Position Detection
Disclaimer: All pictures were taken from the Internet and may be cropped or scaled and subjected to copyrights. All models are over 21 years old and these images are processed to block out the objectionable contents. The best efforts were taken to make these images harmless to anyone. If anyone should find the contents of this webpage offensive, please send a comment email to . All contents on this webpage are strictly for scientific research purpose. If any software will issue any alarm on pornographic contents on this webpage, that software must issue a false alarm :-) We suggest you to use our porno detection software if this happens.

For more information on this technology, please send your request to

List of Search Engine Keywords Leading to this Page: OpenSky Automatic Achiever Outputs

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A Brief Survey of Porn-Detection/Porn-Removal Software

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