Converting RAW image files to PPM via dcraw was slightly better with Ubuntu 9.10 Alpha 4, but a very slim difference.
用dcraw将RAW文件转换成PPM格式文件，Ubuntu 9.10 Alpha 4要好一点，但好的有限。
Software of the image matching of the LED chip had been developed. At last, an example of the LED chip's location had been gived, which showed the process of the PPM.
开发了LED芯片的图像定位标记的图像匹配软件，结合一个LED芯片定位标记的定位的实例，说明了点模式匹配的过程。
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