This article makes the first step to study the types of the language segment - ideo writing system ac-cording to its origins, and divides it into the picture type writing and the sign type writing.

The study of the contents and forms of the pictographic signs in Poyage Book reveal that they are an original pictographic writing system used by the Zhuangs of Funing County in Wenshan Zhuang Autonomous Prefecture of Yunnan Province.

For the salt-pepper noise which deduces in the gaining,processing,transmission of the visual text images,a new algorithm for removal of salt-pepper noises is proposed,which based on the characters stroke characteristic.