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Designing Projection Systems & Utilising the PISCR Standard in Your Work Johnny Jensen dnp denmark.

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Presentation on theme: "Designing Projection Systems & Utilising the PISCR Standard in Your Work Johnny Jensen dnp denmark."— Presentation transcript:

1 Designing Projection Systems & Utilising the PISCR Standard in Your Work Johnny Jensen dnp denmark

2 Copyright 2013 by InfoComm International ® 2 Introductions & learning objectives Determining image size Measuring light Front projection Setting up, aligning & calibrating projection systems Practical PISCR exercise Test & award certificates Introductions & Agenda

3 Copyright 2013 by InfoComm International ® 3 Integrators? Clients/end users? Project Managers? Consultants & specifiers? Live events techs? IT professionals? Others? Who’s Attending?

4 Copyright 2013 by InfoComm International ® 4 Understanding of correct design principles for a projection system Know which measurement units and tools to use for which measurement type Understand of correct procedures for installing and setting up a projection system Ability to apply the PISCR Standard for projects Learning Objectives

5 Copyright 2013 by InfoComm International ® 5 Parameters: –Viewing requirements of the task –Text size (or detail) to be displayed –Viewing distances –Image (and hence screen) height –Aspect ratio of image The maximum viewing distance is based on the amount of detail we need to see in the image, not the resolution of the image Determining Image Size

6 Copyright 2013 by InfoComm International ® 6 Viewability – Image Size Depends on –Furthest viewer –Amount of detail in image These determine image size –In turn defines nearest viewer Copyright 2013 by InfoComm International ®

7 7 Image height depends on: –The distance to the furthest viewer –The detail that must be seen –Based on the task Distance to the furthest viewer depends on: –The image height –The detail that must be seen –Based on the task Determining Image Size/Viewing Distance

8 Copyright 2013 by InfoComm International ® 8 Image Height – Text Height Method Copyright 2013 by InfoComm International ® Furthest viewing distance = Maximum of 150 x text height Height

9 Copyright 2013 by InfoComm International ® 9 Image Height – Content Type Method Image Height 4x6x8x InspectionCluesGeneral

10 Copyright 2013 by InfoComm International ® 10 Nearest Viewing Distance Minimum viewing distance equals the image width An additional criterion is based on the vertical angle of view Copyright 2013 by InfoComm International ® 0° 15° Max to centre of image 30° max to top of image Image WidthI.W.

11 Copyright 2013 by InfoComm International ® 11 Viewability – Viewing Angle How far off axis? –45°, unless brightness drop off (due to high gain screen) makes it less Copyright 2013 by InfoComm International ®

12 12 Illuminance & Luminance Illuminance Light falling on a surface e.g. light falling on a table Luminance Light coming from or transmitted through a surface e.g. light entering a camera

13 Units of Light Measure Incident light – Lux (US/imperial – Footcandle) Reflected light – Nit (US/imperial – Footlambert) Copyright 2013 by InfoComm International ®

14 14 Intros & learning objectives Determining image size Measuring light Front projection Setting up, aligning & calibrating projection systems Practical PISCR exercise Test & award certificates Introductions & Agenda

15 Copyright 2013 by InfoComm International ® 15 Projection Surfaces Reflective –Light bounces off the screen to the viewer –Front projection Most common Variety of surfaces Copyright 2013 by InfoComm International ®

16 Front Projection Surfaces Passive reflectors of light Copyright 2013 by InfoComm International ® Smooth, non-gloss surface Good colour rendition Reflects light back at source Best if viewers are near same level as projector Reflects light at same angle it strikes the screen, but on the other side of the screen's axis

17 Copyright 2013 by InfoComm International ® 17 Projection Surfaces Transmissive –Light passes through the screen to the viewer –Rear Projection Copyright 2013 by InfoComm International ®

18 Screen Gain Characteristic which determines apparent brightness of screen within usable viewing area Screens do not amplify light Gain is a result of the screen focusing light Unity gain screens have gain of 1 –Matte White High gain screens have gain >1 –Aim the light at the viewer Gain is inversely proportional to maximum viewing angle Copyright 2013 by InfoComm International ®

19 19 Projector Positioning There are three dimensions to projector placement - all in relationship to the desired image dimensions and location Use projector manual to determine location Copyright 2013 by InfoComm International ®

20 20 Distance from projector to screen (Z axis) Throw Distance

21 Copyright 2013 by InfoComm International ® 21 Keystone Error and Correction Correct projector position (X and Y axes) ensures correct image Projection axis must be perpendicular to screen to eliminate keystone error Copyright 2013 by InfoComm International ®

22 22 Digital Display Alignment Adjustment for best performance –Focus and zoom –Centring –Clock and phase –Auto adjustments Copyright 2013 by InfoComm International ®

23 The Projected Image Additive vs subtractive colour Copyright 2013 by InfoComm International ®

24 24 System Black Display systems create light, they do not create dark The screen’s ability to reproduce black is limited to the darkness of the screen when it is displaying a black image System black is defined by three parameters: –Display screen material –Ambient light level –Light from the display with a solid black image input Copyright 2013 by InfoComm International ®

25 25 Ambient Light Any light other than the displayed image Can be minimised by good design Sometimes necessary –e.g. on presenter area near screen Copyright 2013 by InfoComm International ®

26

27 27 Projector Calibration Greyscale Colour bars Done with lighting set for normal system use –NOT with lights off and windows covered Copyright 2013 by InfoComm International ®

28 28 Contrast Ratio Simultaneous comparison of maximum brightness relative to the ability to represent black Calculated by averaging readings from 8 black and 8 white zones and comparing them High contrast images: –appear crisper –appear to have more depth –easier to read text Copyright 2013 by InfoComm International ®

29 29 System Contrast Ratio Contrast ratio of the total light our eyes receive Includes the entire light path –Projector –Screen –Ambient light PISCR requires system contrast ratio Copyright 2013 by InfoComm International ®

30 30 Intros & learning objectives Determining image size Measuring light Front projection Setting up, aligning & calibrating projection systems Practical PISCR exercise Test & award certificates Introductions & Agenda

31 Image Contrast Ratio For business applications: What is an acceptable projected image contrast ratio? Copyright 2013 by InfoComm International ®

32 32 ANSI/INFOCOMM 3M-2011 Title: Projected Image System Contrast Ratio –4 options for viewing task –5 viewing positions Copyright 2013 by InfoComm International ®

33 33 Four Viewing Tasks Passive viewing – minimum 7:1 Basic decision making – minimum 15:1 Analytical decision making – minimum 50:1 Full motion video – minimum 80:1 Copyright 2013 by InfoComm International ®

34 34 Five Viewing Positions Viewing Area Plan must identify A.Image width and height B.Centre of image (horizontal centre line of screen) C.Plane of screen (vertical) D.Height of screen from floor E.Five measurement locations identifying distance to plane of screen and centreline of screen Copyright 2013 by InfoComm International ®

35 35 System Setup Criteria Copyright 2013 by InfoComm International ® Install projector and screen Room lighting set as in normal use Set up & calibrate projector Image size & geometry Pixel clock Levels for black & white Colour settings

36 Copyright 2013 by InfoComm International ® 36 Copyright 2013 by InfoComm International ® 36

37 Copyright 2013 by InfoComm International ® 37 PISCR Test Report The Measurements Results Form includes the collected data, and the result of the data analysis in one place This can be included in the project documentation, and be provided to a client Note the 16 data points for each of the five locations Copyright 2013 by InfoComm International ®

38 38 Conformance For the required viewing category: CONFORMS: All five measurement locations meet or exceed the required contrast ratio PARTIALLY CONFORMS: One but no more than four measurement locations falls below required contrast ratio by up to10% FAILS TO CONFORM: At any one of the measurement locations contrast ratio is more than 10% below the requirement Copyright 2013 by InfoComm International ®

39 Hands on PISCR 1.Identify an appropriate screen location 2.Identify viewing location measurement positions 3.Set up the projection system, both mechanical and image alignment 4.Measure and record the luminance values for each location 5.Calculate the contrast ratio for each location 6.Determine whether the projection system conforms with the Standard Copyright 2013 by InfoComm International ®

40 40 Questions?

41 Copyright 2013 by InfoComm International ® 41 Understanding of correct design principles for a projection system Know which measurement units and tools to use for which measurement type Understand of correct procedures for installing and setting up a projection system Ability to apply the PISCR Standard for projects Learning Objectives

42 Copyright 2013 by InfoComm International ® 42 Test 12 questions –Multiple choice 15 minutes Pass score is 9/12 Copyright 2013 by InfoComm International ®

43 43 Intros & learning objectives Determining image size Measuring light Front projection Setting up, aligning & calibrating projection systems Practical PISCR exercise Test & award certificates Introductions & Agenda

44 Copyright 2013 by InfoComm International ® 44 Evaluations please! www.infocomm.org Thank You


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