摘要:
A method for embedding a secret message into a PNG image comprises steps: converting a secret message into a plurality of secret codes; converting the secret codes into a plurality of secret shares; using a mapping process to modify values of the secret shares to approach a full-transparent value of an alpha channel of a PNG image, and sequentially embedding the mapped secret shares into the alpha channel. As the secret shares with high-transparent values, they leave the RGB channels untouched. Thus, embedding the secret shares into the PNG image does not make difference in the appearances between the secret-carrying image and the original PNG image. Therefore, the present invention can transmit secret message securely and realize covert communication.
摘要:
A control switch for a fire extinguisher in the present invention has a spring placed between a handle and an operating lever and pivoted by a pivot axle; a change-over switch pivoted within a through hole formed in the operating lever, by which the change-over switch can be changed over in an ON position and become vertical so that a press-in valve stem can be pressed by a bottom of the change-over switch to open a valve seat to inject a fire-extinguishing agent for extinguishing fire when the operating lever is pressed downward; the change-over switch can be changed over in an OFF position and become slanted so that the press-in valve stem can not be pressed and actuated by the bottom of the change-over switch even if the operating lever is pressed downward, thereby achieving an effect of safety control to the fire extinguisher and being convenient in operation.
摘要:
A method for protecting content of vector graphics formats is provided. A first vector graphics is scrambled to generate a second vector graphics. Then a plurality of pixel samplings are performed by the first vector graphics which generating at least a recovery information object according to a predetermined graphics. The predetermined graphics is watermarked to generate a watermark object. And the recovery information object is encoded and embedded in the watermark object to generate a recovery information watermark. Finally, the second vector graphics, the recovery information watermark, and the recovery code are combined to generate a protected first vector graphics.
摘要:
A method for protecting content of vector graphics formats is provided. A first vector graphics is scrambled to generate a second vector graphics. Then a plurality of pixel samplings are performed by the first vector graphics which generating at least a recovery information object according to a predetermined graphics. The predetermined graphics is watermarked to generate a watermark object. And the recovery information object is encoded and embedded in the watermark object to generate a recovery information watermark. Finally, the second vector graphics, the recovery information watermark, and the recovery code are combined to generate a protected first vector graphics.
摘要:
In accordance with the present invention, a neural network comprising an array of neurons (i.e. processing nodes) interconnected by synapses (i.e. weighted transmission links) is utilized to carry out a probabilistic relaxation process. The inventive neural network is especially suited for carrying out a variety of image processing tasks such as thresholding.
摘要:
The present invention discloses an automatic ultrasonic and computer-vision navigation device and a method using the same. In the method of the present invention, the user guides an automatic navigation device to learn and plan a navigation path; next, the automatic navigation device navigates independently and uses ultrasonic signals and computer vision to detect the environment; then, the automatic navigation device compares the detected environment data with the navigation path to amend the physical movement track. The present invention enables ordinary persons to interact with the automatic navigation device without operating the computer. As the present invention adopts computer vision and ultrasonic signals to realize the functions thereof, the manufacturers can save the hardware cost.