Image File Preparation Using
Photoshop 5.0 or 5.5
instructions are for good standard believable photographic images,
for surrealistic image manipulation and artistic interpretation
WARNING. Copyright law prohibits the publication of images without
permission. Posting web pages and photocopying in quantity are forms of
publishing. An image does not need to display ã
in order to have legal protection. When you create an original image, whether
with a camera or otherwise, you have U.S. copyright protection. You may
publish your own photos. They are yours unless the people in the pictures
you have taken do not consent to it. Commercial use always requires model
releases from the people in your pictures.
remove extra background,
to back up when you goof up.
Save it Save
the file using the File + the
Save commands from the
top menu in Photoshop. If you downloaded from a digital camera, your images
will already be saved files. See "where to save" below. If you scan, remember
to Save before working.
Where to save. The first time a file is saved, you get a dialog
box asking where you want to save it. Image files can be temporarily saved
in a folder you make on the computer desktop (the Mac screen is called
the desktop). Diskettes are too slow and may be too small for image files.
Save it temporarily on the Mac desktop so it responds faster while you
work. If you are more comfortable not using a Mac, Adobe Photoshop is also
on the PCs on campus. You can make a temporary C:drive folder on a PC to
use while you work. This avoids network lockups and speeds saving. Student
assistants can help you with file management questions.
File size. Large high resolution image files can respond very slowly
in Photoshop. If this is a problem, you may want to scan at a lower resolution
next time. However, for good quality printed photographs it pays to use
a relatively high resolution. This will make large file sizes. For good
quality prints the resolution should be at least 200 dpi. More
file size information
Where to save when done working. Images that you want to keep should
be saved in your own M:drive, on a Zip disk, or on 3.5-inch diskettes.
Do not leave any personal files on an individual computer desktop or C:drive
unless it is your own computer.
1. Use Full Range of Tone
Enhance and Correct It. Use Adobe Photoshop to check and make corrections
and enhancements. Here are several easy routines to help make an effective
Go to the top menu. Use the Image +Adjust +Levels menu to take
out any unused latitude. If the histogram shows a flat area at either end,
use the sliders to eliminate the flat area. Almost every image will be
improved by this simple adjustment. Experiment with the center slider,
but most images do not need this adjustment. Select
OK when finished.
Tone and Contrast. The tone and contrast of the image can also
be adjusted with Image +Adjust +Brightness /Contrast. Experiment
with the sliders. Most pictures should look snappy but still natural, but
other styles may be better.
Color Correction. Often digital photos have a slightly magenta cast.
Others have the wrong color balance because of the light during photographing.
Correct color balance by using the Image +Adjust +Variations. By
experimentation the color can be made to look more natural. If we print
out the image on a color printer, we generally find that the printer produces
a different color balance than the monitor does. Artists who understand
color theory can generally get a good print after two or three printouts.
Some monitors can be "tuned" to match the printer, making it easier to
Crop. Cropping should be done before finalizing the image size.
Crop images to eliminate uninteresting, and/or distracting elements. Photoshop
5.0 hides the cropping tool under the top left button with the rectangle
on it. Press this button until you see a row of secondary buttons. Press
the right-most one. This allows you to draw a cropping rectangle on your
image. It has grippers on the corners and the sides which allow you to
adjust the size of it. Press the Enter key when the crop lines are adjusted.
If your image has a distracting detail or blemish, take it out with the
any one of several of the tools on the vertical tool bar. Zoom in on the
area first using the magnifying glass from the vertical tool bar.
Your cursor changes to a circle with a + sign. Click repeatedly to enlarge
a detail. It shrinks the image smaller again if you hold down the Option
key on a Mac while clicking (use the Alt key on a PC). Or just use View
+Fit on Screen.
Use Ruler. If you do not see a ruler at the top and left of the
image, press Ctrl +R. Use the ruler to help you visualize the size.
Or, go to View, +Rulers.
Image +Image Size from the top menu can be used to change
the image height and width.
The Image +Image Size dialog box also gives control of the file
size by stipulating the resolution after we have stipulated the height
or width of the image. Web page images can be set to a resolution of 72
after they are scaled to size. Lower than this will produce noticeable
deterioration of quality. More than 72 probably will not make them look
better. Images intended for printing should be set to a resolution of about
250 or 300. Adjust images to fit the paper size the printer accommodates.
Pay attention to landscape and portrait orientation in File, +Page
The rubber stamp tool (cloning tool) is a convenient favorite for
removing blemishes. It can replace a blemished portion or a distracting
part of a photo with a color and texture from any place else on this photo
or even from another photo open near by on the monitor.
First you press the rubber stamp button.
Then locate it where you find a color, tone, and texture you want to copy.
Hold down the Alt key (Option key on a MAC) and click once with the mouse.
Move the stamp to the blemish and click on it.
Repeated use can cover a large blemish or even eliminate a distraction
in the background.
Filters +Sharpen +Unsharp Mask.
Adjusting the size of tools. If the stamp is covering an area too
small or too large, the effective size is adjusted by selecting a different
brush size. The brushes pallet is made visible by selecting Window
+Show Brushes. Click on the Brushes tab. Now select with different
sizes. If this fails, go to the next step.
Brush Size Preferences. In the event that selecting a different
brush size does not work, go to File +Preferences +Display & Cursors
and pick Brush Size and Precise at he bottom. OK it
Set Threshold at 4
Set Radius at 0.6
Place the small square magnifying box on the eye of a person in
Slide the Amount slider until sharpness is maximized without pixilating
the edges of images.
Click OK +Save
How to back up if you goof
If you mess up, Photoshop 5.0 allows you to go back to any previous
step. Go to Windows, +Show History. Click on the action where you
want to revert to. You can always use File +Revert. This brings
back the image as it was last saved. If you catch a mistake immediately,
you can use Edit +Undo.
By now you realize there are a multitude of additional Photoshop commands.
Experiment and use the Help files to improve and manipulate.
you are done.
If this is a file for a Web page, use File +Save a Copy. Be sure
to select .jpg or .jpeg as the file extension. This allows
compression to a smaller file size. In Save a Copy, you can rename
the file before saving to give it a short name. Be sure to place the .jpg
file extension at the end of the file name unless Photoshop is doing it
automatically. The .jpg file extension may be needed my non-Mac computers.
If you are saving for a Web page, use a low resolution (72 pixels per inch)
and select a low or medium quality so the file size is no more than about
50k. Browsers will download your image faster and the quality is very nearly
the same as with less compression (called "high" quality).
If you are planning to print the image with a high resolution printer,
save the file as a high resolution .jpg or use another file extension format
that does not compress the files. Use the photoshop .psd file type if you
need to save layers. This may give some very large file sizes.
File Size Review
Be sure to:
Save or Save As a .jpg file before
attempting to print (file sizes are smaller allowing file resolutions up
to 300 dpi without problems).
If jpeg is not available in the
Save As file types, first use Layer +Flatten.
link gives more detail.
Use the BACK button to return here.
Very IMPORTANT if printing from
Mac - Send the file to the printer in jpeg mode.
NEVER use asci or binhex mode (your
may be charged for many garbage pages) .
Newer digital cameras have a Compact Flash Card that can be read directly
by inserting the card in the Compact Flash Card reader in Shertz Computing
Center. Student assistants can show you how to do it. Students can move
.jpg files from the Flash Card drive to their M:drive (or a Zip drive if
scanning from other photos
Located in UN001, there are flatbed scanners and a slide/film scanner
can be requested with which to convert any image to a computer file in
Photoshop. See the Scanning Instructions sheet or an assistant
if you need help scanning.
2000 Marvin Bartel, Photography Instructor, Goshen College file/art4c/studios/photPrep.doc
Goshen students may make a copy fro their own use. e-mail firstname.lastname@example.org
updated august 2001
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