In order to auto recognize typhoon on satellite pictures

an algorithm is proposed in the paper

which is based on the character of layout of texture direction. The texture direction of typhoon in the satellite pictures disposes with obvious character. A new conception named vector square is introduced to measure the character of texture direction of an image. The process of how to calculate the vector square is presented in detail. According the algorithm

a small window is slid throughout the image

at the same time

the texture direction of every pixel in the window and the vector square of the window are worked out. The size of the sliding window can be adjusted automatically to cope with various typhoon images. Compared the vector square with the threshold

it is clear whether or not it is a map of typhoon. The threshold of vector square would be adjusted according the intensity of typhoon to enhance the adaptability of the algorithm. The result proved that the algorithm is accurate and widely available

which can recognize typhoons in different types and phases.