RGBE文件的扩展名为.hdr，RGBE正式名称为RadianceRGBE格式。这个本来是BR、FR等作为radiance材质的一种格式，也叫做radiancemap，后来成为流行的一种HDR格式。所谓E，就是指数。RadianceRGBE文件每个通道为8bitBYTE数据类型，4个通道一共是32bit。RGBE可以使用RLE压缩编码压缩，也可以不压缩。由文件头、RGBE数据组成。-RGBE RGBE file name extension. HDR, formally known as Rad

This web page describes a set of command-line tools for creating and manipulating High Dynamic Range (HDR) images, which I'm provisionally calling "HDR Tools", although I suspect that this name is probably already taken. It consists of six

读取envi的img格式，需要有hdr文件(To read the IMG format of envi, you need to have a HDR file)