1. Objectives
Upon the completion of this topic the student will be able to explain Reproduction of
Motion picture
TV picture
C-O5/SDE-TV of 90

2. In the last class we have discussed about
Recap
In the last class we have discussed about
The smallest area of Light or Shade in the image is called
pixel or picture element.
A camera tube converts picture information into an electrical signal, where as a picture tube converts an electrical signal into picture information.
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3. Motion pictures use the important property of eye that
is persistence of vision.
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4. The eye will integrate all the frames and the viewer as the
impression of seeing all the images at the same time.
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5. If a series of still pictures with each picture differing
slightly from the preceding one are rapidly scanned in
one second, a smooth, continuous motion picture can be
viewed by the viewer.
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6. A motion picture can also be reproduced, if
16 frames are scanned in one sec..
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7. Discontinuity in the illusion of light may be defined as flicker.
PERSISTENCE OF VISION
FLICKER
Discontinuity in the illusion of light may be defined as flicker.
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8. FLICKER
RASTER
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9. FLICKER IMAGE C-O5/SDE-TV-5302.2 of 90
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C-O5/SDE-TV of 90

10. FLICKER EFFECT C-O5/SDE-TV-5302.2 of 90
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C-O5/SDE-TV of 90

11. FLICKER NO EFFECT C-O5/SDE-TV-5302.2 of 90
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C-O5/SDE-TV of 90

12. FLICKER HOW TO AVOID FLICKER ? Increase the rate of downward moment
This will increase the slope of the lines
In turn, every alternate line gets scanned
C-O5/SDE-TV of 90

13. Flicker effect is noticeable, if frame frequency is less than sixteen.
Even if frame frequency is 24, flicker effect appears, if there are brightness variations between the adjacent frames.
To avoid flicker effect totally, the frame frequency should be 50 or greater than 50.
C-O5/SDE-TV of 90

14. SUMMARY WE HAVE DISCUSSED ABOUT FLICKER AND ITS EFFECT REPRODUCTION OF
MOTION PICTURE
TV PICTURE
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15. QUIZ
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16. No. of frames/sec. in motion picture are a.25 b.50 c.16 d.none
C-O5/SDE-TV of 90

17. 2. No. of frames/sec. in TV picture are a. 25 b. 50 c. 16 d. none
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18. Frequently asked questions
Distinguish b/w motion picture and TV picture frames in reproduction
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19. THANK YOU
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