Research On PSD Document Analysis And Automatic Marking By XML Expression

Currently, Photoshop is the best tool for image processing. In order to train talents of animation design, Zhejiang Province introduced examinations Multimedia Animation in the non-computer professional computer grade examination. Photoshop, one of which is optional software, our university has also set up a corresponding course. There was a glaring problem in the teaching of this course is that students work only review through the teacher manual, can not be achieved automatically Marking. Marking which is time-consuming, manual effort, while Marking scale susceptible to subjective emotional disturbance. In order to improve Marking efficiency, proposed an idea for automatic grading of the Photoshop. This article is from Photoshop operations to achieve automatic examination paper marking the starting point of the studies undertaken.This paper presents that generating XML documents based on the analysis of the binary PSD document information, and then extract the XML document information automatically to make the exam. The specific work is carried out as follows:1) Introducing PSD document storage format, making detailed analysis of the Photoshop file header structure, and its color mode structure, the image resource data structure, data structure and the layer with the mask image data structure.2) Describing the principles, methods and implementation techniques to access PSD document's information. It achieve to access document basic information, layer information.3) Studying the expression structure and achievement of PSD information and XML.4) Introducing principle and implementation flow of Making the exam automatically by Photoshop XML-based. Illustrating the logic of formal description of processes and automatic grading results through the Marking example.Practice has shown that by analyzing the PSD source file for the binary XML file information to achieve expression, Then, based on XML to achieve automatic grading is entirely feasible. The method also has reference value for the other scoring system.