12.4 Grey Level Transformation (LUT)
12.4.2
Gamma
The ’Gamma’ mode performs an exponential amplification, configurable in the range from 0.4
to 4.0. Gamma > 1.0 results in an attenuation of the image (see Fig. 12.8), gamma < 1.0 results
in an amplification (see Fig. 12.9). Gamma correction is often used for tone mapping and
better display of results on monitor screens.
0
200
400
600
800
1000
1200
0
50
100
150
200
250
300
Grey level transformation − Gamma: y = (255 / 1023
γ
)
⋅
x
γ
(
γ
≥
1)
x: grey level input value (10 bit) [DN]
y: grey level output value (8 bit) [DN]
γ
= 1.0
γ
= 1.2
γ
= 1.5
γ
= 1.8
γ
= 2.5
γ
= 4.0
Figure 12.8: Applying gamma correction to an image (gamma > 1)
0
200
400
600
800
1000
1200
0
50
100
150
200
250
300
Grey level transformation − Gamma: y = (255 / 1023
γ
)
⋅
x
γ
(
γ
≤
1)
x: grey level input value (10 bit) [DN]
y: grey level output value (8 bit) [DN]
γ
= 1.0
γ
= 0.9
γ
= 0.8
γ
= 0.6
γ
= 0.4
Figure 12.9: Applying gamma correction to an image (gamma < 1)
MAN093 08/2021 V1.1
77 of 143
Содержание MV4 Series
Страница 8: ...CONTENTS 8 of 143 MAN093 08 2021 V1 1 ...
Страница 12: ...1 Preface 12 of 143 MAN093 08 2021 V1 1 ...
Страница 16: ...3 Product Specification Figure 3 1 Photonfocus MV4 UV 10 GigE GT camera series 16 of 143 MAN093 08 2021 V1 1 ...
Страница 40: ...4 Image Acquisition 40 of 143 MAN093 08 2021 V1 1 ...
Страница 42: ...5 Exposure Control 42 of 143 MAN093 08 2021 V1 1 ...
Страница 52: ...6 Counter Timer 52 of 143 MAN093 08 2021 V1 1 ...
Страница 64: ...10 Image Format Control 64 of 143 MAN093 08 2021 V1 1 ...
Страница 66: ...11 Frame Rate 66 of 143 MAN093 08 2021 V1 1 ...
Страница 82: ...12 Pixel Data Processing 82 of 143 MAN093 08 2021 V1 1 ...
Страница 92: ...12 Pixel Data Processing 92 of 143 MAN093 08 2021 V1 1 ...
Страница 96: ...13 Precautions 96 of 143 MAN093 08 2021 V1 1 ...
Страница 120: ...16 Troubleshooting 120 of 143 MAN093 08 2021 V1 1 ...
Страница 126: ...19 Support and Repair 126 of 143 MAN093 08 2021 V1 1 ...
Страница 128: ...20 References 128 of 143 MAN093 08 2021 V1 1 ...
Страница 132: ...A Pinouts 132 of 143 MAN093 08 2021 V1 1 ...