The Textbook of Digital Photography - PhotoCourse

For more on digitAl photogrAphy, visit http://www.shortCourses.Com 33

http://www.photocourse.com/itext/imagesize/

Here are the relative
sizes of two images
sized to be printed
or displayed at 4 x
5 inches. The larger
image (1500 x 1200
pixels) will print at
300 dots per inch. The
smaller one (360 x
288) will be displayed
on the screen at 72
dpi. Although greatly
different in the number
of pixels they contain,
the different output
devices will render them
the same size.

imAge sensors—imAge size

that are to be printed on a press are first digitally “screened” to break the im-

age up into dots. If you are ever involved in this process your print shop will

give you specifications for your images

The number of pixels in
an image, sometimes
referred to as its
resolution, determines
the size of the image
when it’s displayed on
the screen or how large
a print can be made
that is still sharp.

sCrEEN

rEsOlUTiONs

CGa 320 x 200

EGa 640 x 350

VGa 640 x 480

SVGa 800 x 600

XGa 1024 x 768

SXGa 1280 x 1024

WXGa 1366 x 768

SXGa+ 1400 x 1050

UXGa 1600 x 1200

WSXGa+ 1680 x 1050

WUXGa 1920 x 1200

QXGa 2048 x 1536

QSXGa 2560 x 2048

QUXGa 3200 x 2400

WQUXGa 3840 x 2400

Click to see how it’s
the output device,
not the camera, that
determines image sizes.