| |
| |
Dealing
with Pictures / Produce of Screenshoots (Picture
of the screen) |
|
| |
Dealing
with Picture:
The most pictures, you will get in the internet,
are in the file format ".Jpeg",
".gif" and sometimes ".bmp".
There is something important, you should know
about this file formats.
On your computer a picture consist of many
points. Ever more points, the more details. Every
point consists of three colors, red, blue and
green, and for each color of every point there is
a specific brightness value. If this value is 8
bit, then there are 16 millions color nuances. If
you save a pictures as ".bmp", all
these data are stored in this file. So you can
open this file, saves it again, or saves it after
changing something in the picture, and you have
always same quality, because always all datas of
the picture are stored in the file.
But it is other with ".gif" and
"".jpeg" files.
The "gif" format support only 256
colors.
The "jpeg" format is a compressed
format. If a picture is saved as
".jpeg" file, and the compression is
not too big, the quality is nearly same as in
".bmp" format, but the file size is
very much smaller. But there are no longer stored
all data in the file. You can make as many copys
as you want of a ".jpeg" file, you can
open and close such files as often as you want,
without quality lose. But if you open a
".jpeg" file, changes something, and
saves it again, you will lose quality, because
the picture will compressed again. Please notice,
each saving, a ".jpeg" file lose
quality!
Saving
Pictures:
Normally you can save pictures, which you see in
your Browser, when you you places your mouse
arrow on the picture and pesses your right mouse
button. Then select "Save picture
as..." in the window, which is open then.
Screenshoots:
Webcam-pictures and other pictures which you can
not save on this way, you can save them too, if
you makes a screenshoot. A screenshoot from your
complete screen, you can make if you press the
key "Print Screen". If you want to make
a Screenshoot only from a speacial window, it
must be the active window (to make it aktiv,
klick with your mouse into the window), you must
press the two keys "Alt" and
"Print Screen".
You can test it on my webcam demonstration site
(Webcam - Complete Webpage for upload and testing
your own webcam).
The screenshoot is now in your clipboard. Start
some application (program) which can handle
".bmp" files (for example
"Paint" from Win98). Go in the menuebar
to "Edit" and select "paste".
Now you can save the screenshoot.
Beacause ".bmp" files are very large in
size, you should make the window so small as
possible, so there is to see only the picture,
before you make a screenshoot.
If you want only save the picture, i will explain
you now, what you have to do. I will it explain
with the program "Paint", you have on
Win98.
First open in "Paint" the screenshoot.
Now you need to activate the function for
selection (first right button from the top of the
toolbar)  . Then place you mouse arrow exact at
some corner of the picture, press your left mous
button, keep it down while you move your mouse to
the opposite corner. Now you see a broken line
around the picture, that is the selection. Go in
the menuebar to "edit" and select
"copy" . Now go in the menuebar to
"File" and select "New" . In the new window you see a large
white field. Around the field are 8 little
points. One at each corner, and one at each site
in the middle. Go with your mouse arrow exact to
the point at right lower corner . Press the left mouse button keep him
down while you move your mouse. You see now, that
you can make the white field larger or smaller.
Now make the field smaller than your selected
picture is. Be not anxious, you can make it very
much smaller. Now go in the menuebar to
"Edit" and select "Paste" . A window opens: "The picture in
the clipboard is larger than the bitmap. Should
the bitmap be enlarged? Of course, so click onto
the bottun "Yes". Now you can save the
picture.
If you have some other programs, which can handle
".bmp" and ".jpeg" files, you
can change now the file format from
".bmp" to ".jpeg", so the
size of the file is very much smaller. |
|
|
|
