i am new to digital camera softwares.i am using unibrain fire-i camera on ubuntu 12.10 .firewire stack is new,i am using libdc1394 for grabbing images.i try to execute the example program grab-gray-image.the output image file is not giving result what i expected . i try to grab a human face image.i am adding this as an attachment. the camera parameters are  as follows.
Brightness:
	RC  MC  (active is: AUTO)  AC  (active is: AUTO)  
	min: 128 max 383
	current value is: 304
Exposure:
	RC  MC  (active is: AUTO)  AC  (active is: AUTO)  
	min: 0 max 511
	current value is: 511
Sharpness:
	RC  MC  (active is: MAN)  
	min: 0 max 255
	current value is: 80
White Balance:
	RC  MC  (active is: AUTO)  AC  (active is: AUTO)  
	min: 0 max 255
	B/U value: 95 R/V value: 87
Hue:
	NOT AVAILABLE
Saturation:
	RC  MC  (active is: MAN)  
	min: 0 max 255
	current value is: 90
Gamma:
	RC  MC  (active is: MAN)  
	min: 0 max 1
	current value is: 1
Shutter:
	RC  MC  (active is: MAN)  
	min: 0 max 7
	current value is: 6
Gain:
	RC  MC  (active is: MAN)  
	min: 0 max 255
	current value is: 87
Iris:
	NOT AVAILABLE
Focus:
	NOT AVAILABLE
Temperature:
	NOT AVAILABLE
Trigger:
	NOT AVAILABLE
Trigger Delay:
	NOT AVAILABLE
White Shading:
	NOT AVAILABLE
Frame Rate:
	NOT AVAILABLE
Zoom:
	NOT AVAILABLE
Pan:
	NOT AVAILABLE
Tilt:
	NOT AVAILABLE
Optical Filter:
	NOT AVAILABLE
Capture Size:
	NOT AVAILABLE
Capture Quality:
	NOT AVAILABLE
i am unable to identify the problem .please anyone help me.
Thanks in advance.