mt9v032 aptina, mt9v032 Datasheet - Page 63

• Manufacturer Part Number: mt9v032
• Description: 1/3-inch Wide-vga Cmos Digital Image Sensor
• Manufacturer: aptina

Test 4: Dynamic Range
Test 5: Signal-to-Noise Ratio
PDF: 6538045704/Source:2194051501
MT9V022_DS - Rev. C 9/10 EN
Signal to
A temporal noise measurement is made with the image sensor in the dark and analog
gain changed to the maximum setting of 4X. Signals are measured in LSB on the sensor
output. Two consecutive dark frames are captured. Temporal noise is calculated as the
average pixel value of the difference frame:
The dynamic range is calculated according to the following formula:
A flat-field light source (90 lux, color temperature 4400K, broadband, with IR cut filter) is
used as an illumination source. Signals are measured in LSB on the sensor output. Two
consecutive illuminated frames are captured. Temporal noise is calculated as the
average pixel value of the difference frame (according to the formula shown in Test 4).
The signal-to-noise ratio is calculated as the ratio of the average signal level to the
temporal noise according to the following formula:
Where S
measured for the i-th pixel from the second frame, and N
els contained in the array.
Where
Where σ
measured for the i-th pixel from the first frame, and N
contained in the array.
–
DynamicRange
–
σ
Noise
1i
t
t
is the temporal noise measured from the illuminated frames, S
is the temporal noise measured in the dark at 4X gain.
is the signal measured for the i-th pixel from the first frame, S
σ
i
–
=
Ratio
i
------------------------------------
∑
N
=
p
=
1
(
=
2 N
20
S
64
1i
⋅
20
⋅
–
log
p
S
⋅
MT9V032: 1/3-Inch Wide-VGA Digital Image Sensor
log
2i
)
4
-------------------- -
2
×
⎛
⎜
⎜
⎝
------------------------------------- -
σ
⎛
⎜
⎜
⎝
1022
i
t
∑
N
=
p
1
S
σ
1i
t
⎞
⎟
⎟
⎠
⁄
N
Aptina reserves the right to change products or specifications without notice.
p
⎞
⎟
⎟
⎠
p
is the total number of pixels
p
is the total number of pix-
©2005 Aptina Imaging Corporation. All rights reserved.
Electrical Specifications
2i
1i
is the signal
is the signal
(EQ 20)
(EQ 21)
(EQ 22)