Graphics °æ (¾«»ªÇø)
·¢ÐÅÈË: killest (victor), ÐÅÇø: Graphics
±ê Ìâ: PHOTOSHOP(24)-getting image into photoshop
·¢ÐÅÕ¾: ×Ï ¶¡ Ïã (Mon Mar 23 16:17:52 1998), תÐÅ
You can choose other options if you have the pro-file
installed. See the Read Me file for more infor-mation.
9 Click Image Info to display scanner information
about the image; then click OK.
10 Click OK to open the image.
Note: In Windows 3.1 or higher, to read PhotoCD
disks reliably, you must disable the Smartdrv.exe
CD-ROM disk caching, which is normally started in
the Autoexec.bat file. Open the Autoexec.bat file in a
text editor and add /u to the end of the Smart-drive.
exe line to disable disk caching for all drives; or
add -e to the end of the line to disable a specific drive
(where E: is your CD-ROM drive letter). For more
information about Smartdrive, see your DOS or
Windows documentation.
Opening Raw files
The Raw format is designed to accommodate
images saved in undocumented formats, such as
those created by scientific applications. Com-pressed
files, such as PICT, LZW, and GIF, cannot
be opened using this format. For more informa-tion
on Raw options, see “About file formats” on
page 318.
To open a file using the Raw format:
1 Choose File > Open (Macintosh) or File > Open
As (Windows).
2 Choose Raw from the file format list and click
Open.
3 For Width and Height, enter values for the
dimensions of the file.
4 To reverse the order of the width and height,
click Swap.
5 Enter the number of channels.
6 Select Interleaved if the file was saved with a
progressive display option.
7 Select a color depth and, if necessary, a byte
order.
8 For Header, enter a value.
9 If you are missing the dimensions or header
value, you can have Adobe Photoshop estimate the
parameters. Either enter the correct height and
width values to estimate the header size, or enter
the correct header size to estimate the height and
width, and then click Guess.
10 To have Photoshop retain the header when you
save the file, select Retain When Saving.
11 Click OK.
Importing an anti-aliased PICT file
(Macintosh only)
Choose File > Import > Anti-aliased PICT to
import object-oriented PICT files, such as those
created with MacDraw and Canvas, as soft-edged,
or anti-aliased, files. Because the entire PICT file
must be in memory for this module to operate,
you may not be able to use the module with large
PICT files.
The Anti-aliased PICT dialog box indicates the
current file size and dimensions. To change the
image dimensions, enter new values for Width and
Height; the file size is updated to reflect the new
dimensions. To maintain the same image propor-
57
tions, select Constrain Proportions. You can
choose to open the Anti-aliased PICT file in either
Grayscale or RGB mode.
Acquiring PICT Resources (Macintosh
only)
The PICT Resource module lets you read PICT
resources from a file—for example, to read
resources from another application. For more
information, see “About file formats” on page 318.
You specify the resources you want to read using
the PICT dialog box.
To preview a resource, click Preview; click the
arrow buttons to step forward and backward
through the resources. Note that the number dis-played
for Resource refers to the resource’s posi-tion
in ascending order in the resource fork and
not to the resource’s identification number.
Note: You can also open a file in the PICT Resource
file format by choosing File > Open and, for Format,
choosing PICT Resource. Using the Open command,
however, automatically opens the first resource in the
file in an Adobe Photoshop document and does not
display any other PICT resources in the file.
Opening Quick Edit files
The Quick Edit feature lets you open a portion of
a Photoshop 2.0, Scitex CT, or uncompressed TIFF
file. Working with Quick Edit files can significantly
decrease the time it takes to open large files, espe-cially
files over 4 MB. You can also open a section
of a file when you don’t have enough RAM to open
the entire file or when you want to speed up pro-cessing
while you’re trying out painting techniques
or special effects. You use the File > Export >
Quick Edit Save command to save the section back
to your original file.
To use the Quick Edit feature:
1 Choose File > Import > Quick Edit.
2 Select the file you want to open, and click Open.
3 Drag to select an area of the image.
As you drag, the dialog box displays the file size
and pixel dimensions of the selection to the right
of the image. The following shortcuts can help you
to make a precise selection when you’re using the
selection marquee:
CHAPTER 3 58
Getting Images into Photoshop Use the arrow keys to move the marquee one
pixel at a time. Press = on the keyboard to increase the marquee
by one pixel; press – to decrease the marquee by
one pixel.
4 Click Grid to divide the image into tiles.
To change the grid, click the plus or minus box
under the option. For example, to divide the image
into strips, decrease the grid to one column. You
can use the following shortcuts to move around in
the grid: Click to select a different tile. Press
F to move to the first tile, or press N to
move in sequence through the tiles. Use the arrow
keys to move to the right or to the
left, or to move up and down in the grid. Press Command+A
(Macintosh) or Ctrl+A
(Windows) to select the entire image.
5 Click OK to open the image.
6 Choose File > Export > Quick Edit Save to save
the opened section back to its original file.
Creating new images
The New command lets you create a blank, unti-tled
Photoshop image.
To create a new image:
1 Do one of the following: To base the image dimensions and resolution on
the Clipboard contents, choose File > New. To base the image
size on the default dimensions
and resolution or the last entered parameters, hold
down Option (Macintosh) or Alt (Windows) as
you choose File > New. To base the image size on an open window,
choose File > New. With the New dialog box open,
choose the image whose size you want to match
from the Window menu.
2 Type a name for the image and if desired, set the
width, height, resolution, and mode. See “Color
modes and models” on page 65 for information on
modes.
3 For Contents, select one of the following: White to fill
the background with white, the
default background color. Background Color to fill the image with the
current background color. See page 199 for infor-mation
on choosing the foreground and back-ground
colors. Transparent to create an image containing a
single layer with no color values.
Note: Because images created with the transparent
option contain a single layer instead of a back-ground,
they must be saved in Photoshop format.
Photoshop is the only format that supports layers.
See “Saving files” on page 305 for more information.
Cropping an image
Adobe Photoshop provides two ways for you to
select part of an image and discard the rest: The Image >
Crop command discards the area
outside of a rectangular selection and keeps the
resolution of the resulting image constant.
59 The crop tool (c) lets you crop an image by
dragging over the area you want to keep. You can
also define the size and resolution of the cropped
area. The advantage of using the crop tool is that
you can rotate and resample the area as you crop.
To crop an image using the Crop command:
1 Use the rectangle marquee tool to select the part
of the image you want to keep. Make sure that the
Feather option is set to 0 pixels. For more informa-tion,
see page 153.
2 Choose Image > Crop.
To use the crop tool:
1 Position the pointer on the marquee (0) tool in
the toolbox, and drag to select the crop tool (c).
2 Drag over the part of the image you want to
keep.
When you release the mouse button, the crop mar-quee
appears as a bounding box with handles at
the corners and sides.
3 Use the following methods to adjust the crop
marquee: To move the marquee to another position, posi-tion
the pointer inside the bounding box and drag. To scale the
marquee, drag a handle. To
constrain the proportions, hold down Shift as you
drag a corner handle. To rotate the marquee, position the pointer
outside the bounding box (the pointer turns into a
curved arrow) and drag.
--
oo
il bb yy il ..... Óë¶ûͬÏûÍò¹Å³î
i bbb ll yyy i
iii bb yy iii
oo
¡ù ÐÞ¸Ä:£®killest ÓÚ Mar 25 15:49:32 Ð޸ı¾ÎÄ£®[FROM: victor.hit.edu.c]
¡ù À´Ô´:£®×Ï ¶¡ Ïã bbs.hit.edu.cn£®[FROM: victor.hit.edu.c]
Powered by KBS BBS 2.0 (http://dev.kcn.cn)
Ò³ÃæÖ´ÐÐʱ¼ä£º4.037ºÁÃë