python通过pil模块将raw图片转换成png图片，pil中包含了fromstring函数可以按照指定模式读取图片信息然后进行保存。

rawData = open("foo.raw" 'rb').read()  # http://www.sharejs.com  imgSize = (x,y)  # Use the PIL raw decoder to read the data.  # the 'F;16' informs the raw decoder that we are reading   # a little endian, unsigned integer 16 bit data.  img = Image.fromstring('L', imgSize, rawData, 'raw', 'F;16')  img.save("foo.png") 

其中Image.fromstring函数的第一个参数具体含义如下

1 (1-bit pixels, black and white, stored with one pixel per byte)  L (8-bit pixels, black and white)  P (8-bit pixels, mapped to any other mode using a colour palette)  RGB (3x8-bit pixels, true colour)  RGBA (4x8-bit pixels, true colour with transparency mask)  CMYK (4x8-bit pixels, colour separation)  YCbCr (3x8-bit pixels, colour video format)  I (32-bit signed integer pixels)  F (32-bit floating point pixels)