Reading foo.null?RES=640x480&CHANNELS=3&TYPE=uint8&PIXEL=0.25,0.5,1
foo.null?RES=640x480&CHANNELS=3&TYPE=uint8&PIXEL=0.25,0.5,1 :  640 x  480, 3 channel, uint8 null
    channel list: R, G, B
    Stats Min: 64 128 255 (of 255)
    Stats Max: 64 128 255 (of 255)
    Stats Avg: 64.00 128.00 255.00 (of 255)
    Stats StdDev: 0.00 0.00 0.00 (of 255)
    Stats NanCount: 0 0 0 
    Stats InfCount: 0 0 0 
    Stats FiniteCount: 307200 307200 307200 
    Constant: Yes
    Constant Color: 64.00 128.00 255.00 (of 255)
    Monochrome: No