Images
Creating Images
Image Formats |
Creating Images |
Changing Format |
Transparent Backgrounds |
Background Tiling |
Animated GIFs |
Image Resources |
Screen Captures |
Going Further
There are many excellent commercial products for creating
graphics with computers running Windows. They are broadly
divided into two groups: (1) painting programs and (2) drawing
programs.
Painting Programs and Drawing Programs
Programs in the first category build up an image by assigning
a color to every pixel of the screen that falls inside the
boundaries of the image. Programs in the second category
build up an image by assembling lines, arcs, etc. that are
considered by the program to be distinct objects rather
than just a set of unrelated pixels. Paint programs are
generally easier to learn to use, but drawing programs can
give higher quality results for many forms of graphics.
Some programs combine both painting and drawing capabilities.
The Windows accsessory Paint belongs to the first category;
Freehand and Illustrator are professional level examples
of the second.
Native Formats for Saved Images
In many cases programs save graphics images in their own
"native" format that is specific to that one program.
It is normally wise to save a version of the image in this
format since it may be needed if you wish to modify the
image later. However, in most instances, the native format
for the graphics program cannot be directly displayed by
Web browsers.
Exporting Other Image Formats
In addition to saving an image in native format, graphics
programs usually also give you the option of saving the
image in a format that can be used in other programs (but
such saved files often cannot be further modified by the
program you used to create the image). For example, as we
noted earlier, many graphics programs for Windows allow
you to save an image in BMP format.
Since you are then saving an image for use by another program,
outside of the one that created the image, the process of
saving a file in such a format is often referred to as "exporting"
the image. Indeed, many graphics programs now have "Export
Image", or some similar wording, as a separate item
in their File menus. (Some programs also have a "Save
for Web" item in this menu that will bring up a dialogue
box with some special settings that you can configure for
GIF and JPEG images.) In other cases, you can choose a non-native
format by choosing "Save As" from the File menu
and then selecting the desired format in the dialogue box
that opens.
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