Computer Science 194-23 The Art and Science of Digital Photography - - PowerPoint PPT Presentation

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Computer Science 194-23 The Art and Science of Digital Photography - - PowerPoint PPT Presentation

Oct 17, 2023 306 likes •590 views

Computer Science 194-23 The Art and Science of Digital Photography Lecture 9: Digital Cameras, continued April 8, 2013 danallan@eecs.berkeley.edu barsky@cs.berkeley.edu michael.ball@berkeley.edu Staff email: cs194-23@imail.eecs.berkeley.edu

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Computer Science 194-23 The Art and Science of Digital Photography

Lecture 9: Digital Cameras, continued April 8, 2013 danallan@eecs.berkeley.edu barsky@cs.berkeley.edu michael.ball@berkeley.edu Staff email: cs194-23@imail.eecs.berkeley.edu

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SLIDE 2

Review

Focal Length and Perspective

2 Image from http://en.wikipedia.org/wiki/Crop_factor

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SLIDE 3

Review

Sensor & Pixel Sizes

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1/2.5” APS-C (SLR-sized) 6 MP 6 MP

24mm 16mm 7mm 5mm

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SLIDE 4

Review

Depth of Field

4 Image from http://www.clarkvision.com/photoinfo/dof_myth/

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SLIDE 5

Review

Full capacity of pixels at ISOs

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100 200 400 800

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SLIDE 6

Digital Cameras

Sensors

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Active Pixel Sensors CMOS JFET LBCAST CCD Passive Pixel Sensors

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SLIDE 7

Sensors

Pixel Size

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SLIDE 8

Sensors

Pixels

8 Image from http://en.wikipedia.org/wiki/Active_pixel_sensor

(Light)

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SLIDE 9

Sensors

Microlens

9 Image from Eastman Kodak, from http://www.luminous-landscape.com/essays/kodak-iss.shtml

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SLIDE 10

Sensors

Color Filter Arrays

10 Image from http://en.wikipedia.org/wiki/Bayer_filter

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SLIDE 11

Color Filter Arrays

Bayer Filter

11 Image from http://en.wikipedia.org/wiki/Bayer_filter

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SLIDE 12

Color Filter Arrays

Demosaicing

12 Images from http://www.cambridgeincolour.com/tutorials/sensors.htm

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SLIDE 13

Sensors

Foveon X3

13 Image from http://en.wikipedia.org/wiki/Foveon_X3_sensor

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SLIDE 14

Sensors

Foveon X3

14 Images from http://www.ddisoftware.com/sd14-5d/

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SLIDE 15

Sensors

Low-Pass (Anti-Aliasing) Filter

15 Images from http://www.ddisoftware.com/reviews/sd9-v-bayer/

Foveon Bayer Bayer+LP (AA)

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SLIDE 16

Sensors

Fujifilm SuperCCD SR

16 Images from http://www.dpreview.com/news/0301/03012202fujisuperccdsr.asp

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SLIDE 17

Digital Cameras

Histograms

Photo by Dan Armendariz, 2009 309s, ISO 100 17

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SLIDE 18

Digital Cameras

Dynamic Range

18 Images from http://www.dpreview.com/learn/?/Glossary/Digital_Imaging/dynamic_range_01.htm

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SLIDE 19

Digital Cameras

Dynamic Range

19 Images from http://www.dpreview.com/learn/?/Glossary/Digital_Imaging/dynamic_range_01.htm

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SLIDE 20

Bits and Bytes

Refresher

Bit 0 or 1 Byte 8 bits

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SLIDE 21

Digital Cameras

Analog to Digital Converter (ADC)

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0.00 V 1.00 V 0.55 V Analog Sensor 8-bit Sampling 255 140 Digital Output 10001100

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SLIDE 22

Digital Cameras

Analog to Digital Converter (ADC)

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0.00 V 1.00 V 0.55 V Analog Sensor 12-bit Sampling 4095 2252 Digital Output

100011001100

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SLIDE 23

Digital Cameras

Sensor Linearity

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4095 2048 1024 512 ... 1 stop 1 stop 1 stop ...

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SLIDE 24

Digital Cameras

Tonal Curve

24 Images from http://www.covingtoninnovations.com/dslr/Curves.html

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SLIDE 25

Digital Cameras

RAW vs JPEG!

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RAW JPEG Bit depth 10-, 12-, 14-bit 8-bit Tonal Curve Not applied Applied White Balance Not set Set Compression Lossless Lossy Portability Nonstandard Standard Post-Processing Required Optional

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SLIDE 26

Digital Cameras

“Expose to the Right”

26 Image from http://www.guillermoluijk.com/tutorial/dcraw/index_en.htm

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Computer Science 194-23 The Art and Science of Digital Photography

Lecture 9: Digital Cameras, continued April 8, 2013 danallan@eecs.berkeley.edu barsky@cs.berkeley.edu michael.ball@berkeley.edu Staff email: cs194-23@imail.eecs.berkeley.edu

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