使用matlab处理ljpeg(无损jpeg) [英] dealing with ljpeg (lossless jpeg) using matlab

问题描述

我现在正在处理DDSM数据库(用于乳腺钼靶筛查的数字数据库)..它的缺点是它的扩展性.扩展名是ljpeg(无损jpeg)，它的扩展名支持得很差.我想使用matlab或将它们转换为广泛支持的任何其他类型来阅读它们.谢谢

I am dealing now with DDSM database (Digital Database for Screening Mammography) .. its disadvantage is its extension. It is extension is ljpeg (lossless jpeg) which it is very poorly supported extension. I want to read them using matlab or converting them to any other type which is widely supported. thank

推荐答案

我知道在 http://citeseerx.ist.psu所述. edu/viewdoc/summary?doi = 10.1.1.111.3846 正确编译后，DDSM软件会将图像数据输出为原始字节流；然后必须根据用于对原始胶片成像的数字化仪的模型对这些图像进行归一化，然后创建一个图像文件，该文件可以被图像分析软件环境读取.

I know there is a working version of DDSM's jpeg program for linux at http://www.cs.unibo.it/~roffilli/sw.html I compiled and tested it. I used the MATLAB code as described here to view the images. It displays correctly only for some scanners. As described in the paper http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.111.3846 When properly compiled, the DDSM software outputs the image data as a stream of raw bytes; one then has to normalise these according to the model of digitiser used to image the original films and then create an image file that is readable by one’s image analysis software environment.

* * 我找到了一个完整解决方案，该解决方案可以下载，标准化(基于扫描仪)并将DDSM图像转换为PNG格式.克里斯·罗斯(Chris Rose)博士编写了该程序，请在他的网站上下载

* * I found a complete solution that downloads, normalizes (based on the scanner) and converts the DDSM image to PNG format. Dr. Chris Rose wrote that program, please download it on his website

http://microserf.org.uk/academic/Software.html

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