×
Log in to StudySoup
Get Full Access to Texas State - MC 3311 - Study Guide - Final
Join StudySoup for FREE
Get Full Access to Texas State - MC 3311 - Study Guide - Final

Already have an account? Login here
×
Reset your password

How to measure color temperature?

How to measure color temperature?

Description

Video Productions Final Review


How to measure color temperature?



Chapters 13 and 15

Lighting 

● Color temperature is measured on the Kelvin Scale ○ White light­ equal amounts of different colors

Indoor light ­­ 3200 Kelvin

Daylight ­­ 5400 Kelvin (varies)

● Depends on time of day

● Depends on amount of clouds

● Can range from 5,000­12,000 K

**They’re all variations of blue

Fluorescent light 

● Spike in blue and green 

● Puts green cast over people’s face

Approximate color consistency

● Paper over outdoor scene will have a blue cast on paper ● Paper over indoor scene will have red cast on paper

Hard light vs. Soft light

Hard­ sunny day


What is the kelvin scale of indoor light?



● Clear and defined shadows

● Small light source; sharply defined beam of light Soft­ cloudy day

● Large light source; often reflected

● Diffused light 

● Hides surface detail

● Less shadow

Falloff­ how “fast” the change from light to shadow Hard light­ “fast” falloff

Soft light­ “slow” falloff

“Three point” lighting

1. Backlight

a. Brightest 

b. 45 up and behind

c. Highlights the hair

d. Makes 3D effect

2. Key light

a. Lights the person

b. Narrow beam

c. 45 from subject an upward

d. Hardlight 


What is the kelvin scale of daylight?



3. Fill light 

a. Casts wide beam 

b. Not as bright

c. 45 from top, 30 from subject

d. Softens shadows, won’t be as strong

Types of light:

1. Fresnel (fruh­nel)

a. Key light

b. Adjustable to flood or spot If you want to learn more check out What is the keynesian model?

c. Named after fresnel lens it uses

d. Centric circles diffuse and concentrate light

e. Adjustable metal flaps to control lighting If you want to learn more check out What is the main definition of clinical psychology?

2. Scoops

a. Most widely used fill light in TV

b. No lens

c. 12­18” diameter

d. 500­2,000 watts

e. Can use scrim to diffuse light (spunglass)

3. Ellipsoidal spots

a. Hard, focused beam

b. Can fit with colored gels to project pools of light on a background If you want to learn more check out What is an argument?

Fluorescent and LED lights

● Burns cool 

● Softer light

● Still use 3­point method

○ Cyc light­ lights background

Chroma Key (Green Screen)

Name keys (on CG monitor) are luminance keys If you want to learn more check out What is the most endearing early gesture?

● Based on light

Chroma key is based on color

Color removed from picture

Three types:

1. Hard key

a. Edge around talent; unflattering 

2.  Samples key­ source subject and background for light values a. Can be used to key transparent object

3. Shadow key

a. Places a shadow of the subject on background

Difference between blue and green screen:

● Blue is complementary to flesh tones, but limits clothing ● Green lets you key blue objects

● Green paint is more reflective and easier to matte

● Cameras are more sensitive to green

Virtual Reality Sets

● Combining computer graphics with chroma key If you want to learn more check out What are the 4 main functions of the kidney?

● Can create an entire scene

● Used a lot in news sets

Difference from Chroma Key:

● Virtual sets allow for real time camera tracking 

● Angle of the background image changes as camera moves  ● In chroma key, when the camera moves, the background doesn’t  We also discuss several other topics like What is the wear and tear theory of aging?

Building a virtual set:

● Create images

○ Done in consultation with customer 

○ Create parts of virtual environment 

● Combine images with computer­generated background  ● Simulate background 

● Rehearsal, blue screen studio 

● Minimum props

● Live actors

● Finished products, looks real

○ Can create 3D environment you can’t reproduce in the studio

Digital Video 

Moving Pictures­ frames

● Silent movies­ 16 frames per second

● Sound movies­ 24 frames per second

○ Still standard today

● NTSC (National Television System Committee)­ 30 frames per second ● ATSC (Advanced Television System Committee)

○ Digital video 

○ 24, 30 or 60 frames per second

Scanning:

● Interlacing

○ Odd­numbered lines san, then even numbered

● Interlacing being replaced by progressive scanning 

● Both fields scan in correct numerical order (lines 1, 2, 3)

● Digital video produced

Television standards:

● NTSC

○ 525 lines, 30 frames per second

● SECAM 

○ 625 lines, 25 frames per second

● PAL 

○ 625 lines, 25 frames per second

● ABC 

○ Digital SDTV HDTV different standards

Popular systems:

● 480p­ p stands for progressive

● 720p (ABC)­ more lines, very sharp, progressively scan high­definition ● 1080i (CBS, NBC)­ more than double 525 lines, twice as sharp. (I stands for  ● interlace)

● 1080p­ progressively scan (BluRay DVD) 

Analog= “waves”

● Analog signal varies

● Must amplify and reamplify continuously

● Creates “noise”

Digital= “bits”

● Strings of 1’s and 0’s and can be reproduced accurately 

● “sample” analog signal

● Thousands of times per second

Compression:

● Lossless compression­ shrinking without losing information

● Lossy compression­ shrinking with some loss of information

Intraframe­ compress an individual frame of video 

Interframe­ looks at changes from one frame to the next to see which pixels are the  same

● Designed specifically for moving video

● Looks at adjacent frames to see which pixels are the same

● Specifies a key frame every seven frames­ renders key frame completely ● Subsequent frames

Ratio of “how much” you can compress data

Pixel­ short for “picture elements”

● Smallest unit of video information 

● Each pixel made up of red, blue or green dot

Editing

Continuity editing:

● Goal: Move the action along

● Compress time

○ Shoot 3 seconds of action then cut to a reaction shot then back to the action 

● No discontinuous jumps in time or place

○ Shoot for the edit

○ Five shot method

■ Hands 

■ Face

■ Wide

■ Over­the­shoulder

■ Another angle

Jump cut­ when a shot goes from one image to another but doesn’t necessarily  make sense

**can’t happen in real life

Cutaway

● The edit “cuts away” from the main action. Why is this needed?

● To cover jump shots

● To show reaction. (reverse angle)

● Edit on the action

● A shot of someone walking and then shooting the same shot from a different angle 

Continuity issues:

● Lighting­  change in the quality of light from shot to shot ruins continuity ● Physical appearance­ people should not change from shot to shot ○  Clothing

○ Hair and makeup 

● Audio

○ Word­picture match

○ “say it, see it”

○ “see it, say it”

Non­Broadcast Video

Institutional Video:

● Corporate

● Educational 

● Religious

● Medical

● Government

Corporate:

● Training

● Employee orientation

● Video tours and conferences

● Close up detail

Training:

● Affordable 

● Easily distributed 

● Short production time

● Corporate video depts.

Independent Production Houses

Medical:

● Inform patients and doctors about new treatments

● Instruct medical students in procedures, both clinical and surgical ● Promotional videos

Religious:

● Shoot church services

● Church activities

● Instructional videos

● Promotional videos

Government:

● Public access channels 

○ City, county, schools, more

● Inform residents of governmental activities

● Record and broadcast city council, school board, commission meetings ● Interview and call­in shows

Avocational Video

Applying a hobby or a pastime to professional uses

Examples:

● Insurance agent tapes contents of insured homes in case of loss ● Animal rights groups tapes inhumane treatment of animals creates  ● documentary

● Camp counselor tapes daily

● Law student tapes depositions for law firms

● Women videotapes school graduation ceremonies, sell them to parents  ● Dying man recites his will on video, talking directly to each beneficiary ● Student videotapes and edits a wedding, turns it into a freelance business

Page Expired
5off
It looks like your free minutes have expired! Lucky for you we have all the content you need, just sign up here