Video surveillance systems for use in security applications - Part 5: Data specifications and image quality performance for camera devices

IEC 62676-5:2018 defines recommendations and requirements for representation and measuring methods of performance values to be described in materials such as instruction manuals, brochures and specifications of video surveillance camera equipment. The first part of this document defines requirements for description of video surveillance camera specification items. The second part defines requirements for measurement methods of video surveillance camera specification items.

Systèmes de vidéosurveillance destines à être utilisés dans les applications de sécurité - Partie 5: Spécifications des données et performances de la qualité d'image pour les dispositifs de caméra

L'IEC 62676-5:2018 définit des recommandations et des exigences concernant les méthodes de représentation et de mesure des valeurs de performances à décrire dans des supports tels que manuels d'instruction, brochures et spécifications de caméras de vidéosurveillance. La première partie de ce document concerne les exigences de description des éléments de spécification des caméras de vidéosurveillance. La seconde partie concerne les exigences de méthodes de mesure des éléments de spécification des caméras de vidéosurveillance.

General Information

Status
Published
Publication Date
04-Jun-2018
Current Stage
PPUB - Publication issued
Completion Date
05-Jun-2018
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IEC 62676-5
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Video surveillance systems for use in security applications –
Part 5: Data specifications and image quality performance for camera devices
Systèmes de vidéosurveillance destinés à être utilisés dans les applications de
sécurité –
Partie 5: Spécifications des données et performances de la qualité d'image pour
les dispositifs de caméra
IEC 62676-5:2018-06(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62676-5
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Video surveillance systems for use in security applications –
Part 5: Data specifications and image quality performance for camera devices
Systèmes de vidéosurveillance destinés à être utilisés dans les applications de
sécurité –
Partie 5: Spécifications des données et performances de la qualité d'image pour
les dispositifs de caméra
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.320 ISBN 978-2-8322-5763-0

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62676-5:2018  IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 7

INTRODUCTION ..................................................................................................................... 9

1 Scope ............................................................................................................................ 10

2 Normative references .................................................................................................... 10

3 Terms, definitions and abbreviations ............................................................................. 11

3.1 Terms and definitions ............................................................................................ 11

3.2 Abbreviations ........................................................................................................ 21

4 Description of video surveillance camera specification items ......................................... 22

4.1 General ................................................................................................................. 22

4.2 Camera ................................................................................................................. 22

4.2.1 Image sensor ................................................................................................. 22

4.2.2 Maximum resolution ....................................................................................... 25

4.2.3 Minimum illumination ..................................................................................... 25

4.2.4 Signal to noise ratio (SNR, S/N ratio) ............................................................. 26

4.2.5 White balance ................................................................................................ 26

4.2.6 Electronic shutter ........................................................................................... 27

4.2.7 Electronic sensitivity up (Slow shutter)........................................................... 27

4.2.8 Dynamic range (DR) ...................................................................................... 28

4.2.9 Visible dynamic range (VDR) ......................................................................... 28

4.2.10 Infra-red illumination operating view distance ................................................ 28

4.2.11 Day/Night mode (D/N) .................................................................................... 29

4.2.12 Internal image processing performance ......................................................... 29

4.3 Lens ..................................................................................................................... 30

4.3.1 Focal length ................................................................................................... 30

4.3.2 Relative aperture (F-number) ......................................................................... 30

4.3.3 Field of view .................................................................................................. 30

4.3.4 Image distortion ............................................................................................. 31

4.3.5 Iris control ..................................................................................................... 31

4.3.6 Mount type .................................................................................................... 31

4.3.7 Image flare .................................................................................................... 32

4.4 Input / Output ........................................................................................................ 32

4.4.1 Video output .................................................................................................. 32

4.4.2 Auto-iris lens output ....................................................................................... 32

4.5 Video output format .............................................................................................. 33

4.5.1 Image format standard ................................................................................... 33

4.5.2 Colour representation .................................................................................... 33

4.5.3 Output image pixel number ............................................................................ 33

4.5.4 Output image resolution ................................................................................. 34

4.6 Pan and tilt ........................................................................................................... 34

4.6.1 Rotation angle ............................................................................................... 34

4.6.2 Rotation speed .............................................................................................. 34

4.6.3 Preset position function ................................................................................. 35

4.6.4 Preset position accuracy ................................................................................ 35

4.6.5 Audible noise ................................................................................................. 35

4.7 Network ................................................................................................................ 36

4.7.1 Network interface........................................................................................... 36

4.7.2 Image and video compression format............................................................. 36

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IEC 62676-5:2018  IEC 2018 – 3 –

4.7.3 Bit rate control ............................................................................................... 36

4.7.4 Maximum frame rate ...................................................................................... 37

4.7.5 Maximum number of encoding streams .......................................................... 37

4.7.6 Multicast streaming ........................................................................................ 38

4.7.7 Maximum number of connections ................................................................... 38

4.7.8 Total encoding performance .......................................................................... 38

4.7.9 Image stream delay (Latency) ........................................................................ 38

4.7.10 Camera storage (Local storage)..................................................................... 39

4.7.11 Audio function................................................................................................ 39

4.7.12 Network protocol............................................................................................ 39

4.7.13 Camera time synchronization and localization ............................................... 40

4.8 Network security ................................................................................................... 40

4.8.1 General description ....................................................................................... 40

4.8.2 Network authentication .................................................................................. 40

4.8.3 Video authentication and watermarking ......................................................... 41

4.9 Other specifications .............................................................................................. 41

5 Measurement methods of video surveillance camera specification items ....................... 41

5.1 Setting of standard shooting condition .................................................................. 41

5.1.1 General ......................................................................................................... 41

5.1.2 Common standard shooting condition ............................................................ 42

5.2 Video signal quantization level .............................................................................. 44

5.2.1 General ......................................................................................................... 44

5.2.2 Digital video signal quantization level ............................................................ 44

5.2.3 Other quantization levels ............................................................................... 44

5.3 Measurement environment .................................................................................... 44

5.3.1 General ......................................................................................................... 44

5.3.2 Test chart ...................................................................................................... 45

5.3.3 Software for measurement ............................................................................. 48

5.4 Measuring methods ............................................................................................... 48

5.4.1 General ......................................................................................................... 48

5.4.2 Resolution ..................................................................................................... 48

5.4.3 Minimum illumination ..................................................................................... 56

5.4.4 Dynamic range .............................................................................................. 59

5.4.5 Visible dynamic range (VDR) ......................................................................... 67

5.4.6 Infra-red illumination operating view distance ................................................ 70

5.4.7 Image distortion ............................................................................................. 73

5.4.8 Image flare .................................................................................................... 77

5.4.9 Capture frame rate ........................................................................................ 84

Annex A (normative) Sine wave star test chart ..................................................................... 88

Annex B (informative) Infra-red illuminator safety requirements according to

IEC 62471............................................................................................................................. 91

B.1 General ................................................................................................................. 91

B.2 Declaration of the hazard distance ........................................................................ 91

B.3 Other information to be declared ........................................................................... 92

B.4 Item indication ...................................................................................................... 92

B.5 Content indication ................................................................................................. 92

Annex C (informative) Low light performance method .......................................................... 93

C.1 General ................................................................................................................. 93

C.1.1 General ......................................................................................................... 93

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– 4 – IEC 62676-5:2018  IEC 2018

C.1.2 Test chart ...................................................................................................... 93

C.1.3 Creation of the coloured dead leaves structure .............................................. 94

C.1.4 Capturing a reference image .......................................................................... 94

C.1.5 Capture of the test images ............................................................................. 94

C.1.6 Image quality aspects affected by low light .................................................... 94

C.1.7 Presentation of the results ............................................................................. 96

C.2 Example for generating a single performance value from measured results........... 96

C.3 Description of test chart example .......................................................................... 97

C.3.1 General ......................................................................................................... 97

C.3.2 Chart sizes and background .......................................................................... 98

C.3.3 Sine wave modulated starburst patterns ........................................................ 98

C.3.4 OECF patches ............................................................................................... 98

C.3.5 Colour patches .............................................................................................. 98

C.3.6 Dead leaves ................................................................................................ 100

C.3.7 Slanted edges and visual structures ............................................................ 101

C.3.8 Small sine wave modulated starburst patterns ............................................. 101

C.3.9 Centre marks ............................................................................................... 101

Annex D (informative) Streaming bit rate (bit-stream) ......................................................... 102

D.1 General ............................................................................................................... 102

D.2 Description ......................................................................................................... 102

D.3 Uncompressed and compressed video streams ................................................... 102

D.4 Content indication ............................................................................................... 103

D.4.1 General ....................................................................................................... 103

D.4.2 Video streaming in a system ........................................................................ 103

D.4.3 Network traffic analysis (NTA) ..................................................................... 103

D.5 Measuring the video streaming ........................................................................... 104

D.5.1 General ....................................................................................................... 104

D.5.2 The procedure of measuring streaming bit rate in a system ......................... 104

Annex E (informative) IP video latency measurement ......................................................... 107

E.1 General ............................................................................................................... 107

E.2 Description ......................................................................................................... 107

E.3 Visual perception of the latency .......................................................................... 109

E.4 Measurement procedure for IP video latency ...................................................... 109

E.5 Content indication ............................................................................................... 110

Annex F (informative) Motion blur measurement ................................................................ 111

F.1 General ............................................................................................................... 111

F.2 Description ......................................................................................................... 111

F.3 Projected pixel shift (PPS) due to moving objects ............................................... 111

F.4 Content indication ............................................................................................... 111

F.5 Calculating the projected pixel shift of moving objects ........................................ 112

F.6 Calculating the projected pixel shift of moving objects at various angles ............. 113

F.7 Acceptable PPS .................................................................................................. 113

F.8 Test chart measuring of moving objects .............................................................. 114

Annex G (informative) SD/HD test target example .............................................................. 118

Annex H (informative) UL test chart implementations ......................................................... 119

Annex I (informative) Explanation of image flare from light source within and outside

of camera field of view ........................................................................................................ 120

I.1 Image flare of light source within the field of view ............................................... 120

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IEC 62676-5:2018  IEC 2018 – 5 –

I.2 Image flare of light source outside of the field of view ......................................... 120

Bibliography ........................................................................................................................ 122

Figure 1 – Test set-up for reflective test chart ....................................................................... 45

Figure 2 – Test set-up for transparent test chart ................................................................... 46

Figure 3 – Test set-up for fixture with lamps ......................................................................... 47

Figure 4 – Alignment of the camera with the target plane using a mirror ............................... 48

Figure 5 – IEC 61146-1 No. 4 and No. 5 (Resolution chart) ................................................... 49

Figure 6 – ISO 12233:2000 Resolution test chart .................................................................. 50

Figure 7 – Sine wave modulated starburst pattern test chart ................................................. 51

Figure 8 – The star is divided into eight segments for the analysis ........................................ 53

Figure 9 – The star is analysed radius by radius, equivalent to frequency by frequency ........ 53

Figure 10 – The pixels along a specific radius are located .................................................... 54

Figure 11 – Digital code values as a function of the angle ..................................................... 54

Figure 12 – Calculation of the contrast of the sine curve ....................................................... 55

Figure 13 – Example of grey scale test chart ........................................................................ 57

Figure 14 – Example of OECF transparent test chart ............................................................ 57

Figure 15 – Signal difference between white area and black surrounding .............................. 58

Figure 16 – Example of lamp fixture ...................................................................................... 60

Figure 17 – Possible arrangements of luminance levels ........................................................ 61

Figure 18 – Graphical presentation of results ........................................................................ 67

Figure 19 – Example of signal level ...................................................................................... 69

Figure 20 – Graphical presentation of results ........................................................................ 70

Figure 21 – White chart ......................................................................................................... 71

Figure 22 – Camera positioning ............................................................................................ 71

Figure 23 – Video level ......................................................................................................... 72

Figure 24 – Conversion measurement using electronic shutter .............................................. 73

Figure 25 – Regular grid (solid lines) in the scene is distorted and the red diamonds

mark the position of the intersections in the image produced by the camera ......................... 74

Figure 26 – Line grid pattern chart ........................................................................................ 75

Figure 27 – Schematic drawings for measuring the horizontal line distortion ......................... 77

Figure 28 – Schematic drawings for measuring the vertical line distortion ............................. 77

Figure 29 – Example test chart with multiple black areas (“Dot pattern chart”) ...................... 79

Figure 30 – Set-up of image flare device ............................................................................... 80

Figure 31 – Image flare lamp for cameras with small field of view (large focal length) ........... 81

Figure 32 – Image flare lamp for cameras with large field of view (short focal length) ........... 81

Figure 33 – Evaluation area .................................................................................................. 83

Figure 34 – Frame rate test target......................................................................................... 85

Figure A.1 – Sine wave test chart (multiple target version) .................................................... 88

Figure C.1 – An example for a multipurpose test chart with frame rate tester ........................ 93

Figure C.2 – An example for a multipurpose test chart .......................................................... 98

Figure D.1 – Network connection for video streaming measurement ................................... 105

Figure D.2 – An example graph of network traffic ................................................................ 106

Figure E.1 – Comparison of image compression and video compression ............................. 107

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– 6 – IEC 62676-5:2018  IEC 2018

Figure E.2 – Example of GOP ............................................................................................. 108

Figure E.3 – Video latency .................................................................................................. 110

Figure F.1 – Motion blur due to moving objects ................................................................... 111

Figure F.2 – Calculation of projected pixel shift ................................................................... 112

Figure F.3 – Movement in various angles .................................................

...

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