Preparing a Photo for Projection
What’s special about Digital projectors?
Digital projectors use images fed to them from a computer and a computer makes up images (or photos) from small square ‘tiles’ called pixels. Bury P.S. has a projector whose image consists of 1400 pixels wide and 1050 pixels high.
This means that if you want to be sure that what you see on the screen is the same as what you want to see then your image must be 1400px by 1050px- no bigger and no smaller. Being close is not good enough!
This means that if you want to be sure that what you see on the screen is the same as what you want to see then your image must be 1400px by 1050px-
Screen
Now most Projector / Computer combinations will cope very well with any image they are asked to project and 9 times out of 10 everything will be OK without any thought being given to image size, aspect ratio or colour rendering but Murphy’s Law states that “Yours will be the tenth”
Aspect Ratio (AR).
That’s the ratio of width to height of an image.
Our projector has the same Aspect Ratio of all other “Photo” projectors:- 4 :3
(4 x 350 = 1400 and 3 x 350 = 1050)
Digital SLR cameras have an AR of 3:2 which is the same AR as SLR film cameras.
Compact cameras have an AR of 4:3 usually.
This means that a picture from an SLR must be cropped if the image is to fit perfectly onto a digital screen and if it doesn’t fit the screen exactly then we need to know what will fill the blank spaces.
Our projector has the same Aspect Ratio of all other “Photo” projectors:-
Digital SLR cameras have an AR of 3:2 which is the same AR as SLR film cameras.
Compact cameras have an AR of 4:3 usually.
This means that a picture from an SLR must be cropped if the image is to fit perfectly onto a digital screen and if it doesn’t fit the screen exactly then we need to know what will fill the blank spaces.
Portrait Style Images
Suppose you submit a picture which is not ‘landscape’ but is ‘portrait’ format.
The image height can only be 1050pixels maximum so the width will be something around 740pixels. You need to know how the blank 330 pixels on each side will look when projected
The image height can only be 1050pixels maximum so the width will be something around 740pixels. You need to know how the blank 330 pixels on each side will look when projected
An uncropped shot from a digital SLR leaves blank areas top and bottom of the screen
A portrait format shot leaves large expanses of
nothingness on the
nothingness on the
The first two pages are background info which you may find interesting. Go to page 3 for the guides