Visual effects based on blank fractions in the case of multi-paragraph text overlay images
Authors: Zhang Yiran
Abstract: Multi-segment text overlay images are commonly used in web design, poster layout and other design-related activities. In this paper, we use a character-based blank score calculation model and a text box-based blank score calculation model to investigate which model is more effective in reflecting visual aesthetics in the case of multi-part text overlay images. The text-frame-based blank-score model was found to be more effective in reflecting the visual perception of the subjects by using the fitting tool in MATLAB to fit the subjective scores and the calculated blank scores. The text box in the text box-based blank score model was then optimized by eliminating the part of the last line of each paragraph that was not filled with text, so that the text box was not a regular rectangle, but still a relatively regular linear text box. In the case of multi-paragraph text overlay image, when the line spacing and paragraph spacing are the same, subjects cannot distinguish the beginning and end of several paragraphs of text by line spacing. In this paper, an optimized text box-based margin score calculation model is used to design an experiment to investigate the effect of the margin score of the text box of the last line of the preceding paragraph on the visual effect of subjects' visual division of paragraphs in the case of multiple-paragraph text-covered images. The results show that when the blank area of the last line of the previous paragraph is about half of the area of the previous line, the visual aesthetic satisfaction is the highest, i.e., people can quickly and accurately divide the paragraph without reading the text content, while when the last line of the previous paragraph is filled with text, the visual aesthetic satisfaction is the lowest, and people cannot intuitively divide the paragraph without reading the text content.
Keywords: visual effects，blank fractions，multi-paragraph text overlay images
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