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Web presence

Dr. T. Balasubramanian M.S. D.L.O.

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• Sheer size of audience

• Freedom of expression

• You decide the screen play / Content

• The stage is entirely yours

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The Hurdles

• Editor• Editorial Board• Publishing Board• Financial Proforma• Publisher

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What to do ?

• Document your cases meticulously

• Personal data base of interesting / unique cases

• Collect references

• Now you are ready to take the plunge

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I have interesting surgical videos

• You tube• Yahoo videos• AOL videos• Photobucket

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Making yr video fit for uploading

• Editing

• Adding commentary

• Video size (optimal 100 mb)

• Supported video formats

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Embedding videos to yr site

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Web publishing

• Wiki• Blogging• Personal website• Popfly• Google apps• Google sites

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Tools needed

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Handy cams (types)

• Cassette type• DVD• Hard disk

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Video editing software

• Pinnacle

• Ulead

• Adobe premiere

• Windows movie maker

• I movie (Apple)

• Final cut pro (Apple)

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Recording endoscopic surgery

• Using Handy cam

• Using laptop / computer – video capture card

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Fire wire port

• Used to record from tape handy cam

• Video should be played completely for recording it

• Fire wire port / cable needed

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Types of cables

• S video cable

• Composite cable

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S Video

• Super video

• Video is carried as two separate signals i.e. Luma (luminance) and chroma (color)

• Audio is not carried in the same cable

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Composite video

• Commonest video interface

• Since the signal passes through low pass filter there is some amount of degradation

• Sound is also carried through the cables

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Y/C signal comparison between composite (a) and S-video (b).

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Video compression

• MPEG 1 – for video cds

• MPEG 2 – Set top boxes / DVD

• MPEG 4 – For web

• DV – used in handy cams

• DiVx – Recently developed standard

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Image formats

• BMP (Bitmap)• JPEG (Good for photographs)• PNG Portable network graphics Good for icons)• GIF (Graphic interchange format)• DICOM (Digital imaging and communications in

medicine)• TIFF (Images for printing)

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Water marking images

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BMP 152 kb JPEG 28 kb PNG 8 kb

GIFF 12 kb

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JPEG

• Use this for photographs

• Don’t edit an already edited JPEG file

• Optimize the size of the image for web viewing

• If you have to put multiple JPEG images in a single page put a smaller version giving the option of downloading the larger file to the viewer

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Dicom

• Standard for handling medical imaging

• This image format contains also pt details for easy archiving

• It needs a special viewer to view it

• Image J is the commonly used viewer to view these files

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Dicom converters

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Image editors

• Photoshop

• Acdsee

• Corel paintshop

• GIMP

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Knol them

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