today's camera technology
TRANSCRIPT
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Today’s Camera Technology - Image Sensor -
National Institute of Technology, Kagawa CollegeAdvanced Course in Electronics, Information and Communication Engineering
01-16 Keita Yamazaki------------------------------------------------
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C a m e r a o b s c u r a
© JCII Camera Museum
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P h o t o g r a p h i c p l a t ed a g u e r r é o t y p e
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3 5 m m f i l mP h o t o g r a p h f i l m
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I n s t a n t c a m e r aT w i n - l e n s r e f l e x c a m e r a
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D i g i t a l c a m e r aS i n g l e - l e n s r e f l e x c a m e r a
© Canon / Amazon.co.jp© Canon / Amazon.co.jp
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S m a r t p h o n e ( i P h o n e )
i S i g h t c a m e r a© Apple © Apple
© m0bilecenter.org
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© Gigazine © Gigazine
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Structure© Nikon
Viewfinder
Finder Screen
Image Sensor
ShutterMirror
Diaphragm
Lens
Shutter Button
Pentaprism / Pentamirror
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Structure© Nikon
Viewfinder
Finder Screen
Image Sensor
ShutterMirror
Diaphragm
Lens
Shutter Button
Pentaprism / Pentamirror
010
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Image Sensor
Image Sensor Collection of Photo Diode
© VLCC
Lens
The Lens of the eye
Pupil(Lens)
Iris(Diaphragm)
Retina(Image Sensor)
Optic Nerve
Image Sensor (CCD / CMOS)
Human Eye
© JST
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Photo Diode
can capture intensity of light.
can’t read COLORS.
The Photo Diode is a monochrome sensor.
© livedoor
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How To Record ColorsPhoto Diode(Opto Electronic Devices)
Color Filter
On-Chip Lens
Lens
Object
Image Sensor Output Electrical Signals
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This method name is “Bayer Image Sensor”.
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Bayer Image Sensor Bayer Image Sensor
© SIGMA015
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Bayer Image Sensor Bayer Image Sensor
Why?
© SIGMA016
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Bayer Image Sensor Bayer Image Sensor
Why?
© SIGMA
Spectral Luminous Efficiency
Wavelength
Sp
ect
ral
Resp
on
se
Human eye's sensitivity is different depending on the wavelength.
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Demosaicking Bayer Image Sensor
© SIGMA
𝑅31 𝐺32 𝑅33
𝐵22
𝐵42
𝑅32′
𝐺32
𝐵32′
𝑃32
Estimation the top and bottom of the blue= CHROMA COMPENSATION
Estimationleft and right of the red
= CHROMA COMPENSATION
COLOR RESTORATION
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Bayer Image SensorFoveon X3 Direct Image Sensor
Foveon X3 Direct Image Sensor© SIGMA019
Three Layer Structure
Depth of its layer structure
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Bayer Image SensorFoveon X3 Direct Image Sensor
© SIGMA
© SIGMA
Foveon X3 Direct Image Sensor020
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Conclusion
To pursue “100%” is a kind of OBSESSION by an engineer.
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Conclusion
is something like FETISHISM of camera’s developer.is in demand to NICHE MARKET.
OBSESSIVENESS
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In the near future,It’s important for us to pursue fetishism to technology and develop products.
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Thank you for your listening!Keita Yamazaki------------------------------
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