该文是关于中国图像工程的年度文献综述系列之十五。为了使国内广大从事图像工程研究和图像技术应用的科技人员能够较全面地了解国内图像工程研究和发展的现状，并能够方便地查询有关文献，现从2009年在国内15种有关图像工程重要中文期刊的共134期上发表的3604篇学术研究和技术应用文献中，选取出1008篇属于图像工程领域的文献，并根据各文献的主要内容将其分别归入图像处理，图像分析，图像理解，技术应用和综述五个大类，然后进一步分入23个专业小类（与去年相同）。在此基础上还进行了各期刊各类文献的统计和分析。根据统计分析结果可看到我国图像工程在2009年许多新进展的情况。特别值得指出，在上述15种期刊上所发表的图像工程文献数量在2009年继续增加并达到历史最高，显示了图像工程在中国继续蓬勃发展的趋势。另外，借此综述系列15年之际，还将这15年分成3个5年的阶段，分别对3个阶段的图像工程文献选取情况和各类图像工程文献数量进行了统计和对比分析，以为读者提供更全面和可信的发展动态信息。

This is the fifteenth annual bibliographies in the survey series on image engineering in China. The purpose of this survey work is mainly to capture the up-to-date development of image engineering in China, to provide a convenient means of literature searching facility for readers working in related areas, and to supply a useful reference for the editors of journals and potential authors of papers. Considering the wide distribution of related publications in China, 1008 references on image engineering research and technique are selected carefully from 3604 research papers published in 134 issues of a set of 15 Chinese journals. These 15 journals are considered as important journals in which papers concerning image engineering have higher quality. Those selected references are classified first into 5 categories (image processing, image analysis, image understanding, technique application and survey), and then into 23 specialized classes according to their main contents (same as last year). Some analysis and discussions about the statistics made on the results of classifications by journal and by category are also presented. This work shows a general and off-the-shelf picture of the various progresses of image engineering in China in 2009, it should be pointed out particularly that, in 2009 the number of research papers for image engineering, published in the above 15 journals still maintains an increase and attends a new high stage in the history. A strong tendency of continuing development of image engineering in China is clearly visible. In addition, taking the opportunity of 15th year of survey, some further statistics and analyses on the selections of publications and numbers of publications in all categories are provided on the basis of dividing the 15 years into three “five-year” separately. Thus, the readers could obtain even more complete and reliable information than before.