Yuv 4:2:2 Packed Format - Basler ace acA640-90gm User Manual

9.3.4

YUV 4:2:2 Packed Format

When a color camera is set for the YUV 422 Packed pixel data format, each pixel value in the
captured image goes through a conversion process as it exits the sensor and passes through the
camera's electronics. This process yields Y, U, and V color information for each pixel value.
For more information about the conversion processes, see Section 8 on
The values for U and for V normally range from -128 to +127. Because the camera
transfers U values and V values with unsigned integers, 128 is added to each U
value and to each V value before the values are transferred from the camera. This
process allows the values to be transferred on a scale that ranges from 0 to 255.
The table below describes how the pixel data for a received frame will be ordered in the image buffer
in your PC when the camera is set for YUV 4:2:2 Packed output.
The following standards are used in the table:
P = the first pixel transmitted by the camera
0
P = the last pixel transmitted by the camera
n
B = the first byte in the buffer
0
B = the last byte in the buffer
m
Byte Data
B U value for P
0
B Y value for P
1
B V Value for P
2
B Y value for P
3
B U value for P
4
B Y value for P
5
B V Value for P
6
B Y value for P
7
B U value for P
8
B Y value for P
9
B V Value for P
10
B Y value for P
11
• •
• •
• •
B U value for P
m-7
B Y value for P
m-6
B V Value for P
m-5
Basler ace GigE
0
0
0
1
2
2
2
3
4
4
4
5
n-3
n-3
n-3
Pixel Data Formats
page 139.
177