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Graphic element is one of the most important visual languages in advertising design, and it is the main carrier of emotion and content in emotional advertising. Color is one of the three important elements in the design of print ads, which plays an important role in print advertising. In order to study the effect of color semantic and emotional graphics in print advertising, this paper proposes a new method of image feature extraction, which uses global threshold, so as to realize the analysis of color semantic and graphic elements. Finally, this method is used to analyze the case of print advertising. From the result it can be seen that the reasonable application of the color semantic and perceptual graphic elements can improve the visual effect of the plane advertising and improve the advertising effectiveness. Introduction In the first 20 seconds of focused on the object, the first concern is the color of things, with the extension of time, graphic factors gradually enter into the visual perception, and began to lead to emotional experience [1-3]. Different colors can generate different information symbols, which cause people's emotional resonance, resulting in a more intense psychological change, to achieve different advertising effectiveness. Graphic element is one of the most important visual languages in advertisement design, and it is the main transmission carrier of advertising emotion and content [4,5]. The designer can use graphic elements to put perceptual graphics into the emotions and feelings, which can convey thought and emotion and produce good advertising effect, improving the advertising visual effect and spread ability. So it has important significance for the study of color semantics and graphical elements in the plane advertisement design. Advertising Features based on Color Semantic and Perceptual Elements Symbolic value of color. In daily life, people can also feel the psychological impact of color, through the subtle way, which can affect people's emotions and will. When the color produces emotional reaction through the visual, it has the spirit of advertising value. The associative advertising value of color semantics. The color association refers to a variety of human sensory organs, for a specific color, triggering the feeling of experience. Through the association, it can trigger the related emotions and feelings, resulting in a sense of contact with a certain thing, so that the advertising value of the color is generated. Visual effect of perceptual image element. In advertising design, graphic language is a very important way of expression, so the designers can improve their own cultural heritage through a wide range of reading and accumulate material through the experience of life, so as to display the emotional image elements creativity. Excellent communication skills of perceptual image elements. In graphic advertising design, perceptual graphics language can effectively convey the core idea of advertising works, the performance of the technique is more intuitive. It can use vivid images to display the characteristics of things, so as to enhance the persuasiveness and infectivity of advertising. International Conference on Economics, Social Science, Arts, Education and Management Engineering (ESSAEME 2015) © 2015. The authors Published by Atlantis Press 435 Print Advertisement Image Analysis Method based on Global Threshold In order to analyze the color semantic and perceptual graphic elements in planar ad images, this paper proposes a global threshold analysis method, and does local binarization on the image, so the feature extraction effect of the image is enhanced. The global threshold compared with each pixel of the image [6]. If the value is more than the threshold, it is the front view; if it is less than the threshold, it is the background color. Assuming an image M N  , ) , ( j i f is the gray value of ) , ( j i , its gray level is  , and the value is ] 1 , 0 [  m , ) (k p is frequency of gray value k .    k j i f MN k p ) , ( 1 1 ) ( . (1) Assuming that the threshold of the gray value is t, the foreground and background of the local image is } ) , ( { t j i f  and } ) , ( { t j i f  , so the target proportional of the local image is:     t i i p t 0 0 ) ( ) (  . (2) Target part number is:     t i i p MN t N 0 0 ) ( ) ( . (3) The foreground proportion is:      1 1 ) ( ) ( m i t i p t  . (4) The background part number is:      1 1 ) ( ) ( m i t i P MN t N . (5) The target mean value is:     t i t i ip t 0 0 0 ) ( / ) ( ) (   . (6) The background mean value is:      1 1 1 ) ( / ) ( ) ( m i t t i ip t   . (7) Then the total means value can be expressed as: ) ( ) ( ) ( ) ( 1 1 0 0 t t t t        . (8) In the analysis of the color semantic and perceptual graphics elements, the optimal threshold of image can be expressed as g , and the expression is: ] ) ) ( ( ) ( ) ) ( ( ) ( [ 2 1 1 2 0 0 1 m t 0             t t t t Max Arg g . (9) Among then, ) ( 0 t  represents the target value, the probability is ) ( 1 t  , the background value is ) ( 1 t  , the probability is ) ( 0 t  , the total mean is . In order to make the feature extraction of the color semantics and the image not affecting the image, the segmentation process target should be far from the center of the image, so the value of 2 0 ) ) ( (    t and | ) ( | 0    t should be bigger, the background is also far from the image center, 2 1 ) ) ( (    t and | ) ( | 1    t are also bigger. In order to meet the requirements, the two are weighted and the weight is the biggest, so it is:

Research on Plane Advertisement Design based on Color Semantic and Perceptual Graphic Elements