Line c shows brightness thresholding and the result is an image with only black and white grey
levels. and line d applies a gamma correction (see also Section 5.6.2).
a
y = f ( x )
x
x
m a x
x
0
x
1
y
m a x
b
c
d
Figure 5.33: Commonly used LUT transfer curves
5.6.1
Gain
The ’Gain’ mode performs a digital, linear amplification with clamping (see Fig. 5.34). It is
configurable in the range from 1.0 to 4.0 (e.g. 1.234).
0
200
400
600
800
1000
1200
0
50
100
150
200
250
300
Grey level transformation − Gain: y = (255/1023)
⋅
a
⋅
x
x: grey level input value (10 bit) [DN]
y: grey level output value (8 bit) [DN]
a = 1.0
a = 2.0
a = 3.0
a = 4.0
Figure 5.34: Applying a linear gain with clamping to an image
5.6 Grey Level Transformation (LUT)
71
Summary of Contents for D/L-2048
Page 1: ...User Manual D L 2048 Camera Series CMOS camera with GigE interface MAN055 05 2015 V1 8...
Page 6: ...CONTENTS 6...
Page 14: ...3 How to get started GigE G2 Figure 3 3 PFInstaller components choice 14...
Page 34: ...4 Product Specification 34...
Page 100: ...6 Hardware Interface 100...
Page 120: ...9 Warranty 120...
Page 122: ...10 References 122...
Page 134: ...B Camera Revisions 134...