Classic: Technical Notes
Understanding Graphic Sizing
How Graphic Size is Determined
This technical note provides detailed information about how graphics
are placed and printed on labels. When you create a graphic and
place it on your label, you must make several decisions regarding
the size and resolution of the image.
A graphic consists of a number of small
dots, called pixels, arranged in a two dimensional grid. Each pixel
can be either black or white. The size of a graphic is measured in
pixels. A particular graphic might be 200 pixels wide by 100 pixels
Every printer has a different print density,
typically specified in dots per inch (DPI). For example, the HP
LaserJet has a print density of 300 DPI.
The printed size of a graphic depends upon both
its size in pixels and the print density of the desired printer.
To calculate the printed size (in inches) of a particular graphic,
simply divide its number of horizontal and vertical pixels by the
printer resolution (in dots per inch). For the above example, the
graphic would print 2/3" wide and 1/3" tall.
Changing the Size of a Graphic
You can stretch or shrink a graphic
with LabelVision, either when you bring the graphic into LabelVision
or afterwards by resizing it using the handles. When you resize a
graphic, LabelVision adds or removes pixels. However, doing this causes
the graphic to appear distorted. This distortion is especially apparent
when you have text in the graphic: fonts are very sensitive to the
addition or removal of pixels.
To produce the best graphic appearance, you should
ensure that you do not stretch or shrink the graphic in LabelVision.
To accomplish this, follow the steps given below.
Printing a Graphic
at the Best Possible Resolution
To create a graphic with the best appearance, follow these
- First, decide how large you want the graphic to be, in inches.
Then, multiply this size by the DPI of your printer to determine
how large your graphic should be in pixels.
- Most graphics are created with paintbrush or drawing packages,
such as Corel draw. When you create the graphic, you must make
sure that the graphic has the size (in pixels) that you calculated
in step 1. In Paintbrush under Windows 3.1 or Windows NT, you
set the graphic size with the "Options | Image Attributes" command.
In Windows 95 use the "Image | Attributes" command. Be sure to
click the PELS radio button. Other drawing packages may require
you to specify the size in inches as well as the density of your
printer in DPI.
- Draw the graphic, and save it to a PCX or BMP file.
- In LabelVision, use the "Graphics | Read Graphic File" or the
Windows clipboard to bring in your graphic. If, instead, you use
the Graphic Tool to draw a rectangle, be sure to tell LabelVision
to "Adjust the rectangle you drew" (first and default option on
the "Graphic Size Mismatch" dialog box). Otherwise, LabelVision
will stretch, shrink or crop the graphic to fit your rectangle.
- The graphic should appear at the desired size. If it does not,
then your graphic size was not saved correctly - return to your
drawing package and save the graphic properly, don't resize it
in LabelVision. Note that the graphic quality may appear reduced
on the screen, but it will print correctly if you have followed