The principle of handwriting can be summarized as: 1, which determines the writing habit of writing motivation. The dynamic stereotype of writing refers to the cortical system of systemic function adjustment and activity in automatic control and writing activities. During the practice of writing, the cortex seems to be stimulated by this compound, forming a corresponding temporary connection (air conditioning) system. After repeated stimulating writing practice, a dynamic writing pattern can be formed. The physiological mechanism of conditioned reflex writing habit is based on the dynamic stereotype of writing. 2. Accustomed to people's physical structure, educational writing, writing habits and temperament, everyone's writing habits have different comprehensive influences. 3. Handwriting is the material basis for the identification of signature handwriting. Writing habits will inevitably be reflected in writing materials and handwriting to varying degrees, that is to say, people's will does not follow the objective existence. It is not only long, normal written materials can also be reflected in the signature handwriting, but also in a few handwritten and handwritten materials, abnormal reflection, to varying degrees, this is not completely deliberately concealed changes. 4. Handwriting is the basic condition for relatively stable handwriting inspection. A person's signature handwriting will not change much for a long time. This is because people often have qualitative power, natural language and slowly changing social norms and rules in their articles, so they decide to establish a person's signature handwriting. Although it has different time differences, its basic characteristics are unchanged. 5. The general specificity basis of handwriting identification with handwritten signature. This is because the writing habits of individuals with the dual attributes of homosexuality and particularity determine that the sum of the characteristics of different people who meet there is different, no matter the characteristics of handwriting.
In practice, censors often ask such a question: What is the experience of using handwriting or eye equipment? How to recognize handwriting? How accurate is it? The principle of signature handwriting identification in the previous chapter has answered this question. In fact, signature handwriting is mainly recognized by eyes (that is, experts and experience level), and the instrument is only used to assist microscope observation. In other words, most people are different and have the same writing characteristics. Handwriting is divided into eight functions, and the eight main features are the division of some details. Large and small, everyone's signature handwriting has many characteristics, some of which are special and will not change the camouflage characteristics, which is a valuable function. It is impossible for people who want to pretend to cover up their handwriting function, including inspectors. This is a case of literature retrieval. Handwriting is a process of discovering product characteristics. It is a process and experience to know the identity of a person with good signature handwriting under specific, stable and undisguised characteristics and conditions of the writer, accurately identify these characteristics, determine its value, and count the comprehensive evaluation conclusions of judges on the basis of value characteristics. The eigenvalue of this function can occur at the measurement speed of a specific crowd. Unlike the special personality of 1000 people, only one person has such a special and high eigenvalue. Coming to this "high-value" understanding, the identity of personnel is found in the first special, quality and business identification related person; Second, correctly judge the characteristics of some groups and the experience of relevant case appraisers at about one thousandth of this value. If we think that the plane eigenvalue is not used, or the word value is too large to be realized, it may lead to misjudgment. For example, if one thousandth of a sample with two functions is found in a handwriting, when it is 3%, there are five probabilities of the handwriting features of these two signatures: 0.001× 0.001× 0.01× 0.0/=1. These functions can be accomplished if you don't cherish the great differences and rule out the possibility of learning from each other around you. This is the most popular representative principle of signature handwriting identification.