Difference between revisions of "MTD2 class 11"
esse quam videri
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| − | + | ==The Eye== | |
| − | Helical Head recording Toshiba Firsts | + | http://en.wikipedia.org/wiki/Eyes |
| + | |||
| + | Dynamic Range | ||
| + | :Light contrast of 100:1 or 1,000,000:1 over time | ||
| + | |||
| + | Color Vision | ||
| + | |||
| + | http://en.wikipedia.org/wiki/Color_vision | ||
| + | |||
| + | ==Digitizing Video== | ||
| + | |||
| + | [http://history.acusd.edu/gen/recording/magnetic4.html Helical Head recording Toshiba Firsts] | ||
| + | |||
| + | {| | ||
| + | |- | ||
| + | | [[IMAGE:Videotape1HelicalHead.gif]] | ||
| + | | [[IMAGE:Videotape2HelicalHead.gif]] | ||
| + | |} | ||
| − | |||
| − | |||
RGB Red Green Blue | RGB Red Green Blue | ||
| − | 8Bits each [3(RGB) *8(Bits) = 24 Bit color] or 2^24 = 16777216 colors Color Video uses YCC (YUV(PAL)/YIQ(NTSC)) to be compatable with Black and White Broadcast | + | 8Bits each [3(RGB) *8(Bits) = 24 Bit color] or 2^24 = 16777216 colors Color Video uses [http://en.wikipedia.org/wiki/YCbCr]YCC ([http://en.wikipedia.org/wiki/YUV YUV](PAL)/[http://en.wikipedia.org/wiki/YIQ YIQ](NTSC)) to be compatable with Black and White Broadcast |
| + | |||
Y is luminance (same luminace used in B&W broadcast). Luminace determines the brightness of the pixel | Y is luminance (same luminace used in B&W broadcast). Luminace determines the brightness of the pixel | ||
The Two C's (the c's are known as chrominance) determine the hue. | The Two C's (the c's are known as chrominance) determine the hue. | ||
| − | Analog Video | + | ==Analog Video== |
| − | Composite | + | Composite=== |
| + | :One Cable. The luminance and color signals are merged onto one cable because of this mergin some information will be lost due to inferfernce. | ||
| − | |||
S-Video (beter) | S-Video (beter) | ||
| + | :Separated the luminace and color signal onto separate cables that are encased in one cable | ||
| − | |||
Component (best) | Component (best) | ||
| + | :Each of of the YCC are given their own cable | ||
| + | |||
| + | {| | ||
| + | |- | ||
| + | |Tape Format ||Video Format || Quality || Applications | ||
| + | |VHS ||Composite || Good || Home Video | ||
| + | |S-VHS, Hi-8 ||S-Video|| Better || prosumer, industrial video | ||
| + | |BetaSP || Component || Best || broadcast | ||
| + | |} | ||
| − | |||
| − | |||
| − | |||
| − | |||
Chroma Subsampling http://en.wikipedia.org/wiki/Chroma_subsampling | Chroma Subsampling http://en.wikipedia.org/wiki/Chroma_subsampling | ||
| − | + | ||
| + | Because the human eye is less sensitive to color than luminance the chroma is often recorded with lower deffinition. 4:2:2 color http://en.wikipedia.org/wiki/4:2:2 | ||
4:1:1 color | 4:1:1 color | ||
| − | |||
| − | |||
| − | Digital | + | Digital Video([http://en.wikipedia.org/wiki/DV DV]) |
| + | :DV25 DVCAM, DVPRO DV50, DV100 | ||
| − | Cameras us a Charge Coupled Device (CCD) to convert light into electicty. How Digital Cameras Work | + | ==Digital Cameras== |
| + | |||
| + | Cameras us a Charge Coupled Device (CCD) to convert light into electicty. [[http://electronics.howstuffworks.com/digital-camera2.htm How Digital Cameras Work]] | ||
A 3CCD camera splits the incoming light into three beam and uses three CCD's to capture each of the RGB values. | A 3CCD camera splits the incoming light into three beam and uses three CCD's to capture each of the RGB values. | ||
| − | A 1 CCD Camera can use a color filter array like the Bayer filter pattern to record the RGB color information. | + | A 1 CCD Camera can use a color filter array like the [http://en.wikipedia.org/wiki/Bayer_filter Bayer filter] pattern to record the RGB color information. |
| + | |||
Bayer filters have twice as many green pixels | Bayer filters have twice as many green pixels | ||
Revision as of 16:24, 11 April 2006
The Eye
http://en.wikipedia.org/wiki/Eyes
Dynamic Range
- Light contrast of 100:1 or 1,000,000:1 over time
Color Vision
http://en.wikipedia.org/wiki/Color_vision
Digitizing Video
Helical Head recording Toshiba Firsts
|
|
RGB Red Green Blue
8Bits each [3(RGB) *8(Bits) = 24 Bit color] or 2^24 = 16777216 colors Color Video uses [1]YCC (YUV(PAL)/YIQ(NTSC)) to be compatable with Black and White Broadcast
Y is luminance (same luminace used in B&W broadcast). Luminace determines the brightness of the pixel The Two C's (the c's are known as chrominance) determine the hue.
Analog Video
Composite===
- One Cable. The luminance and color signals are merged onto one cable because of this mergin some information will be lost due to inferfernce.
S-Video (beter)
- Separated the luminace and color signal onto separate cables that are encased in one cable
Component (best)
- Each of of the YCC are given their own cable
| Tape Format | Video Format | Quality | Applications | VHS | Composite | Good | Home Video | S-VHS, Hi-8 | S-Video | Better | prosumer, industrial video | BetaSP | Component | Best | broadcast |
Chroma Subsampling http://en.wikipedia.org/wiki/Chroma_subsampling
Because the human eye is less sensitive to color than luminance the chroma is often recorded with lower deffinition. 4:2:2 color http://en.wikipedia.org/wiki/4:2:2 4:1:1 color
Digital Video(DV)
- DV25 DVCAM, DVPRO DV50, DV100
Digital Cameras
Cameras us a Charge Coupled Device (CCD) to convert light into electicty. [How Digital Cameras Work] A 3CCD camera splits the incoming light into three beam and uses three CCD's to capture each of the RGB values. A 1 CCD Camera can use a color filter array like the Bayer filter pattern to record the RGB color information.
Bayer filters have twice as many green pixels
Animation in Flash
- Onion Skinning
- Motion Tweeing (Key Framing)
- Path Animation
- http://www.echoecho.com/flashtweenings01.htm
Homework
- Read Adobe DV Primer
- Practive motion tween and onion skin animation
Links
