问题
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
回答1:
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.
*EDIT: * 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
回答2:
This link will help you to read and display the image.
EDIT
see this link and follow the steps in the Data sets section, you will decompress the files using linux.
来源：https://stackoverflow.com/questions/9053024/dealing-with-ljpeg-lossless-jpeg-using-matlab