The Cinemadng Initiative-Books Pdf

The CinemaDNG Initiative
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Today s Agenda,Presentation The CinemaDNG Initiative. Camera demo ViewPLUS, Panel discussion Interoperability on the Capture Side. Copyright 2010 Adobe Systems Incorporated,The CinemaDNG Initiative. An industry wide initiative, An open raw image format for digital cinematography. Lars Borg Principal Scientist,Adobe Systems,Copyright 2010 Adobe Systems Incorporated.
Outline of Presentation,Raw image file formats,Objectives for CinemaDNG. The road ahead,Slides posted at http www adobe com go cinemadng. Questions welcome in the on line user forum,Copyright 2010 Adobe Systems Incorporated. Background, Raw is the image file format of choice for pro photography. Cinematographers now embracing raw,What makes raw so great.
Workflow impacts,Copyright 2010 Adobe Systems Incorporated. What is a RAW image file,Starting with Still Photography. The RAW image captures the digital camera s sensor data with no processing. in the camera,Raw unprocessed image sensor data, Raw opposite of baked as in look or white balance is baked in. All image processing is deferred to post,Look white balance black level color grade tone. No on set commitment,Better final quality, 70 of professional photographers shoot RAW InfoTrends 2008.
Copyright 2010 Adobe Systems Incorporated,From scene to camera sensor to RAW image file. Original scene Bayer matrix Light on, light on sensor optical color filter sensor pixels. magnified 100x on the sensor,Image processing JPEG image. voltage 12 bit digital No processing Raw image,Copyright 2010 Adobe Systems Incorporated. From sensor data to final image,Raw digital When processed in camera.
sensor data Early binding,JPEG or Video workflow,magnified 100x Image. processing When processed in post,pipeline Late binding. RAW workflow,Dead pixel removal,Noise reduction,Linearization. Black level subtraction,Demosaicing to RGB,Final image. White balance Still or Video,Lens corrections,Color conversion.
Color enhancements,Toning curve,Digital Inverse Gamma curve. Bayer matrix Clip to 8 10 bits,Lossy compression,Colored items Destructive. Copyright 2010 Adobe Systems Incorporated,Destructive image processing. Black current subtraction,Out Max 0 Image black Reference black. Erroneously high reference black clips shadow details. Noise in image black causes positive bias after clip. White balance to bring neutral objects to R G B,Out Min 1 RGB RGB channel gains.
Overexposed areas are clipped to 1 0 1 0 1 0 to look white. Later rebalancing brings clipped values below 1 0 1 0 1 0. Copyright 2010 Adobe Systems Incorporated,Quality Challenges in Image Processing. Process intensive noise reduction demosaicing,Camera processor is weak to extend battery life. With RAW capture defer to post to get more compute power. Compare quality noise edge artifacts,Copyright 2010 Adobe Systems Incorporated. RAW Too much of a good thing,Proliferation of RAW formats cr2. For example 200 formats supported in Adobe Photoshop LightRoom crw. Processing options coded uniquely for each camera model dcs. Proprietary formats erf,Most formats are undocumented f.
Several formats are encrypted k25,Google RAW storm in a teacup kdc. The Digital Millennium Copyright Act may block legal access mos. A pro photographer s nightmare orf, Can your client or publisher read your file format ptx. An archivist s nightmare raf, Some early formats already dead unsupported unreadable DMCA raw. Copyright 2010 Adobe Systems Incorporated,The Digital Negative DNG format to the rescue. A unified RAW image format superset of features in 200 raw formats. Published 2004 by Adobe Systems,Free SDK tools, Wide adoption 20 of raw images archived in DNG InfoTrends 2008.
See http www barrypearson co uk articles dng products htm for DNG. ISO standard 12234 2 TIFF EP Next rev includes DNG. Copyright 2010 Adobe Systems Incorporated,DNG Format Overview. File structure is TIFF EP like most Raw file formats. File contains complete image decoding description, Black level white level and linearization parameters. Color metadata for sensor colorimetry,Processing controls not tied to camera model. Options include, Single chip with color filter array or multi chip without CFA image sensor. Arbitrary image dimensions within 4 Gbyte file size. Sample size 8 bit to 32 bit integer typically 10 or 12. Arbitrary size CFA pattern Bayer striped etc with up to seven filter colors. Non standard pixel placements such as Fujifilm Super CCD EXR. Arbitrary byte order,Lossless compression 2 1 ratio.
Look controls,TIFF EP EXIF and XMP metadata,Encryption is not an option. Copyright 2010 Adobe Systems Incorporated,RAW Increasingly Embraced in Cinematography. RAW suitable for cinematography dpx,Set look on set non destructive dng. For example see Lightroom r3d,No commitment on set. Deliver look raw image data to post cine,Better final quality pgm.
Raw images excellent source for green screen work wcr. Drawbacks with multiple proprietary RAW formats fhgip. Already at 30 proprietary formats for digital cinema. Applications must be updated for each new format,Some camera vendors already gone fhgwr. Uncertain or limited interoperability fhgwd,Expect an onslaught of DSLR raw video formats 200. Long term archiving at risk,Copyright 2010 Adobe Systems Incorporated. Cinematography Workflows with Multiple RAW Formats. Are you fully connected,Vendor DPX,Raw files HD,Camera 1 avi. dpx GRADING,Camera ari,Camera N wcr,Each application must read 30 200 file formats.
Creating an open documented image format for RAW data from digital motion picture cameras into post production Building an open platform for raw image processing tools Low threshold to entry No IP encumbrances no license fees free SDKs Not a goal mastering distribution stages

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