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ODCC 2017
TEXTURE AND LOOK OF THE IMAGE, HOW TO CONTROL IT.
A CCTC presentation
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Co-chairmen:
Rolf Coulanges, BVK
Mick Van Rossum, NSC
Philippe Ros, AFC
CCTC
Committee for Creative Technologies in Cinematography
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Special thanks to Dave Stump, ASC
CCTC
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THE TEXTURE CONTROL IN THE WORKFLOW
1 - SHOOT & TEXTURE
2 - POST-PRODUCTION & TEXTURE
3 - EXHIBITION & TEXTURE
CCTC
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Some words for texture
For science
• Resolution
• Detailing
For perception
• Sharpness
• Accutance (Combination of detailing & Micro contrast)
CCTC
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Different words different meanings
• Detailing has not the same meaning between all
manufacturers
CCTC
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CAMERALens
1 - SHOOT & TEXTURE
Parameters• Camera - type of sensor)✓Recording format specificities✓ Setting (Gamma/sharpness/OLPF…)✓Noise reduction
• Lens• Glass filtering
• Type of lighting• Projectors - type/diffusion• Make up• Density of atmosphere: particles/fog/dust…• Costume• Set design/Background/Foreground
CCTC
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CAMERALens
1 - SHOOT & TEXTURE
Parameters• Camera - type of sensor)✓Recording format specificities✓ Setting (Gamma/sharpness/OLPF…)✓Noise reduction
• Lens• Glass filtering
• Type of lighting• Projectors - type/diffusion• Make up• Density of atmosphere: particles/fog/dust…• Costume• Set design/Background/Foreground
CCTC
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OLPF:Optical Low Pass Filter): blurs to keep away from aliasing
Bayer filter
OLPF
Lens
Camera
Digital
Treatment
Detailing
Level?Control?
Level of
Sharpness
MTF
Down Up
CCTCTHE ROLE OF OLPF
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CCTCTHE ROLE OF OLPF
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Minimal aliasing
CCTCTHE ROLE OF OLPF
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Strong aliasing
CCTCTHE ROLE OF OLPF
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IsotropicAnisotropic
A marriage between two very different worlds
CCTCTHE ROLE OF OLPF
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CAMERALens
Grading/Finishing
Raw filesDeBayer
Codecs: ProRes, XAVC, Etc.
OnboarddeBayer
Digital filtering - Texture creationSharpness modification
Type of deBayer
Parameters• Type of recording formats• DeBayer
✓ Onboard✓ Post-production✓ Sharpness control
• Gamma encoding/Color mapping
• Grading• Focus/Defocus• Noise reduction• Texture creation - Grain (size/speed)• HDR• HFR (time resolution)
Deliverables
2K DCP
4K DCP
HDBROADCAST MASTER
UHD BROADCAST MASTER
Sharpness control
Sharpness control
CCTC2 - POST-PRODUCTION & TEXTURE
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Parameters (w/o parameters of distance)
SCREENING• Resolution• Speed - HFR• Type of projector (Laser)• Sharpness decision by manufacturers• Type of screening: Projector/LED• HDR/Color space
BROADCASTING • Different types of transportation/compression• Resolution• Speed - HFR• Types of displays • HDR/Color space• All parameters possible (Gamma, Cine Style, Sharpness, etc)
Deliverables
2K DCP
4K DCP
HDBROADCAST MASTER
UHD BROADCAST MASTER
HD Display UHD Display Home cinema
Projector
LED
Wild West!
CCTC3 - EXHIBITION & TEXTURE
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High Dynamic Range and High Frame Rate are influencing the
perception of texture.
No serious studies have been done on these new topics
CCTCHDR, HFR AND TEXTURE
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CAMERA & LENSES
THE PARADOX
CCTCSHOOT & TEXTURE
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CAMERALens
Parameters• Camera - type of sensor)✓Recording format specificities✓ Setting (Gamma/sharpness/OLPF…)✓Noise reduction
• Lens• Glass filtering
• Type of lighting• Projectors - type/diffusion• Make up• Density of atmosphere: particles/fog/dust…• Costume• Set design/Background/Foreground
1 - SHOOT & TEXTURE CCTC
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Nowadays, choosing a set of lenses became the most important phase of tests.
The combination of camera and lenses became a new challenge
Modulation Transfer Function (MTF) for the lenses and detailing for cameras
CCTC
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But are we sure that we know all the parameters of texture given by the camera?
Camera and lenses: the interesting marriage
LENSES CAMERA
CAMERAS AND LENSES CCTC
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Reminder of ODCC 2015 conference on texture
CCTC
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Sony F65
Red Dragon
Sony F55
Canon C500
Varicam 35
Black Magic 4K
Alexa XT
20 M
19 M
11.6 M
9,5 M
8,9 M
8,2 M
7,5 M
4 K
4 K
4 K
4 K
4 K
4 K (Ultra HD)
3,4 K (Up-scaling to 4K)
(Raw Recordingw/ Open gate)
Cameras Number of photosites Recording (resolution)
CCTC
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Cameras Number of photosites Recording (resolution)Sony F65
Red Dragon
Sony F55
Canon C500
Varicam 35
Black Magic 4K
Alexa XT
20 M
19 M
11.6 M
9,5 M
8,9 M
8,2 M
7,5 M
4 K
4 K
4 K
4 K
4 K
4 K (Ultra HD)
3,4 K (Up-scaling to 4K)
(Raw Recordingw/ Open gate)
CCTC
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Cameras Number of photosites Recording (resolution)Sony F65
Red Dragon
Sony F55
Canon C500
Varicam 35
Black Magic 4K
Alexa XT
20 M
19 M
11.6 M
9,5 M
8,9 M
8,2 M
7,5 M
4 K
4 K
4 K
4 K
4 K
4 K (Ultra HD)
3,4 K (Up-scaling to 4K)
(Raw Recordingw/ Open gate)
CCTC
Choosing F65 for wide shots and F55 for close shots
is usually a good solution for the marriage
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Sony F65
Red Dragon
Sony F55
Canon C500
Varicam 35
Black Magic 4K
Alexa XT
20 M
19 M
11.6 M
9,5 M
8,9 M
8,2 M
7,5 M
4 K
4 K
4 K
4 K
4 K
4 K (Ultra HD)
3,4 K (Up-scaling to 4K)
(Raw Recordingw/ Open gate)
Cameras Number of photosites Recording (resolution)
CCTC
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These cameras deliver the same resolution
But they aren’t delivering the same texture and the same sharpness
CCTC
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Requirements
CCTCEXAMPLE OF THE PARADOX
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Requirements
CCTC
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Requirements
CCTC
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• Confusion between photosites and pixels
• Cameras like RED Weapon or Sony F65 are at the same level of than a C300
MKII or an URSA
• Alexa (Open gate) is not mentioned
• Lenses aren’t mentioned
Requirements
CCTC
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Two questions on control of texture
1 - How cameras with such difference of sensors can deliver the same
sharpness?
2 - Can we really choose lenses without understanding the difference of
perception of sharpness between these cameras.
CCTCCONTROL OF THE TEXTURE
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What is at stake:
Conveying emotion & meaning
CCTCCONTROL OF THE TEXTURE
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A first step already given by camera manufacturers
(ARRI, RED, PANAVISION, CANON, PANASONIC)
Access to control of sharpness on RAW materials
in post and to some codecs
CCTCCONTROL OF THE TEXTURE
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An interesting step for the texture has been givern by SONY several
years ago to create gamma encoding
The CVP FILE EDITOR customized Gamma curve
CCTCCONTROL OF THE TEXTURE
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Another important step given by ARRI
1 - A real access to control of sharpness on ProRes (Alexa Mini, Amira)
2 - Comparison tests allowing to judge the quality of a camera regarding
sharpness
CCTCCONTROL OF THE TEXTURE
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A first step given by Arri
Following slides
WORKSHOP AT ARRI MUNICH:
HOW TO CONTROL THE TEXTURE OF THE DIGITAL IMAGE
Special Thanks to Harald Brendel and his team of engineers
Imago website:https://www.imago.org/index.php/technical/item/410-workshop-at-arri-munich-how-to-control-the-
texture-of-the-digital-image.html
CCTCCONTROL OF THE TEXTURE
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Report on the meeting at ARRI Munich July 13 th 2015
CCTCCONTROL OF THE TEXTUREExternalprocess.
ADA5-SW deBayer
In post for 4K Raw
CONTROL OF SHARPNESS
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AMIRAALEXA MINI
Report on the meeting at ARRI Munich July 13 th 2015
AMIRA
In camera for 4K/UHD ProRes
CONTROL OF SHARPNESS
CCTCCONTROL OF THE TEXTURE
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21 3
With the minimum of Detail
The photos below come from zoom in screencaptures
V5 Page
40
ARRI SCALER PARAMETER FEMALE FACE ALEXA MINI & AMIRA
The noise is due to the zoom in the image, but we can see the difference on the structure of the sharpness.
Sharpness
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54 6
V5 Page
41
ARRI SCALER PARAMETER FEMALE FACE ALEXA MINI & AMIRA
Sharpness
Medium settings of DetailThe picture number 5 is the default in the camera, this is the level we are accustomed to find on
an Alexa camera. Settings in the ARC (ARRIRAW Converter) are F=100 S=100
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87 9
ARRI SCALER PARAMETER FEMALE FACE
V5 Page
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ALEXA MINI & AMIRA
Sharpness
With the maximum of Detail
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51 9
From the minimum of Sharpness and Detail to the maximumThe picture number 5 is the default in the camera, this is the level thatwe are accustomed to
find on an Alexa camera. Settings in the ARC (ARRIRAW Converter) are F=100 S=100
ARRI SCALER PARAMETER FEMALE FACE
V5 Page34
ALEXA MINI & AMIRA
Sharpness
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ALEXA SXT, ALEXA MINI & AMIRA
CCTCCONTROL OF THE TEXTURE
In camera for 4K/UHD ProRes
CONTROL OF
NOISE REDUCTION
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Noise reduction: ON Noise reduction: STRONGNoise reduction: OFF
V5 Page44
The photos below come from zoom in screen captures
ALEXA SXT, ALEXA MINI & AMIRA
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FIRST CONCLUSIONS
• The role of sharpness is a key point in the control of the texture
• Choosing a lens without access of sharpness control on the camera
is leading to some important limitations or confusions
CCTCCONTROL OF THE TEXTURE
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New parameters ?
Not really, the first HD ENG cameras starting with the Sony F900 provided through
the PAINT MENU a lot of control on the perception of sharpness
PAINT DETAIL LEVEL 1MASTER WHT BLK
LEVEL - 50 ///////// /////////
LIMITER -99 +99 0,0
CRISP -70 H/V RATIO 0,0
H FREQ -99 LEVEL DEP 0,0
DETAIL ON LEVEL DEP OFF
PAINT DETAIL LEVEL 2KNEE APERTURE LVL 0.0
KNEE APERT OFF
CCTCCONTROL OF THE TEXTURE
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Texture and structure of the pixels
• These parameters, quite complex gave cinematographers a control of the
structure of the pixels.
• This control helped in the past to match 35 mm and HD.
• Do we need similar controls?
• Or could new algorithms create other ways to deal with the static pattern
of the digital image?
CCTCCONTROL OF THE TEXTURE
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CCTCCONTROL OF THE TEXTURE
New methodologies? New parameters ?
• Changing the OLPF? (Time consuming and risk of aliasing)
• Each camera need a refocus after the use of OLPF
• What level of refocus?
• Who is deciding about the level?
• Engineers or/and cinematographers?
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These parameters defined in fact the structure of the pixel
And as a result one of the parameter of the texture
CCTCCONTROL OF THE TEXTURE
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Lenses Manufacturers strategies
CCTCCONTROL OF THE TEXTURE
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Lenses Manufacturers strategies
• Lenses manufacturers are working hard on the control of sharpness,
bokeh and texture
• The new larger sensors (Red, Arri, Sony) as well as the new lenses
for these new cameras will lead to new strategies to control the
unwanted oversharpness
CCTCCONTROL OF THE TEXTURE
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Lenses Manufacturers strategies
• ‘’Clever’’ lenses (Panavision)
CCTCCONTROL OF THE TEXTURE
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Back to
The texture and the structure of the pixels
CCTCCONTROL OF THE TEXTURE
Level and control of sharpness
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Digital
Treatment
Detailing
Level?Control?
Level of
Sharpness
Down Up
CCTCCONTROL OF THE TEXTURE
The texture and the structure of the pixels
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• Are we sure that we are still in accordance with the resolution
standards?
• And are we sure that there’s no other way to combine lenses and
cameras?
CCTCCONTROL OF THE TEXTURE
Level and control of sharpness
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• Sharpness parameters are defined by skilled engineers
• But are these parameters fit with all the aesthetics wishes of
filmmakers?
CCTCCONTROL OF THE TEXTURE
Level and control of sharpness
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Consequences
• If cinematographers don’t have these parameters reachable, they often have
to fight against the machine.
• The combination of ‘’sharp’’ cameras and soft lenses or vintage ones give
interesting results
CCTCCONTROL OF THE TEXTURE
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Conclusions
• Cinematographers/colorists always find strategies to deal with
oversharpness
• We have all the means to improve the creative aspects of
cinematographers craft
• We just need to have some more doors open
CCTCCONTROL OF THE TEXTURE
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Imago Website
Example: Cinematographers Strategies to deal with oversharpness
FILM
‘’CARTAS DA GUERRA’’
CCTCCONTROL OF THE TEXTURE
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Imago Website
Technical and artistic references from Focal about DPC II seminar
https://www.imago.org/index.php/technical/item/608-focal-digital-production-
seminar-in-lisbon.html
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Film
‘’CARTAS DA GUERRA’’
Director: Ivo M. Ferreira
Producer/Editor/Workflow designer: Sandro Aguilar
Cinematographer: João Ribeiro (AIP)
Colorist/Post-production adviser: Paulo Americo da Silva –
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SONY ALPHA 7S customized by João Ribeiro - Cinematographer & Ricardo Simões - First AC
João Ribeiro:
”Camera: Sony A7s, (imposed by the production) it was the first time I film with a “photo camera”.I was really scare, so what I pass to my crew was:“we have to do a film where nobody can say we use this type camera”
‘’The fact that is not heavy, you have to be very educated with that, and tend not to put it everywhere, but just in the correct place for each shot’’
Cartas da Guerra
Advantage:
- Weight
- Sensitivity
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Zoom into the image in black and
white without film grain
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Zoom into the image in black and
white with film grain which literally
fill the lack of information in the
image (low-level of bit allocation)
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Without film grain
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With film grain
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Without film grain Zoom
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With film grainC Zoom
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With film grainWithout film grain
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Requests to camera manufacturers
ODCC Sunday session
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Philippe Ros AFC
THANK YOU!