8.Features
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 142
To create a lookup table, you need to determine the range of
LUTIndex
and
LUTValue
parameters by the
maximum pixel format supported by the currently used camera.
a) On cameras with a maximum pixel bit depth of 12 bits
The
LUTIndex
selectable item is 0-4095, each
LUTIndex
corresponds to a
LUTValue
, and the
LUTValue
range is [0,4095].
b) On cameras with a maximum pixel bit depth of 10 bits
The
LUTIndex
selectable item is 0-1023, each
LUTIndex
corresponds to a
LUTValue
, and the
LUTValue
range is [0,1023].
Create a user-defined lookup table with the following steps:
1) Select the lookup table to use. Since there is only one user-defined lookup table in the camera, there
is no need to select it by default.
2) Set the
LUTIndex
parameter to the pixel value that you want to replace with a new value.
3) Set the
LUTValue
parameter to the new pixel value.
4) Repeat steps 1 and 2 for all pixel values that need to be changed to set the parameters to the target
pixel values in turn.
5) Set the
LutEnable
parameter to
true
means that the lookup table feature is enabled. The default is
disabled.
If you want to replace all pixel values, it is recommended to use the
LUTValueAll
function. See the
LutValueAll
sample code in the Development User Manual for details.
8.5. Image Transmission
8.5.1. Maximum Allowable Frame Rate
1) The maximum allowable frame rate of the network
The maximum allowable frame rate of the network is the camera
’s maximum transmission frame rate that
the current network supports. The maximum frame rate that the MER2-G series camera network supports
is determined by the camera
’s resolution, pixel format (Pixel Size), and the valid network bandwidth. It is
can be expressed by the formula:
The maximum allowable frame rate of the network = the valid network bandwidth/ resolution/ Pixel Size
Example 1
: The camera resolution is 1628*1236, the pixel format is BayerRG8, packet size is 1500 bytes,
packet delay is 1000. The current valid network bandwidth is 468Mbps.
The maximum allowable frame rate of the network =468Mbps / (1628*1236)/8 = 29 fps
The maximum allowable frame rate of the network is 29fps, and the camera meets the front-end sensor
’s
maximum acquisition frame rate of 29fps. In addition to the limitations of network bandwidth, the maximum
working frame rate of the camera is affected by the following two factors: