122 PCWorld DECEMBER 2019HERE’S HOW PHOTO EDITING BASICS
Enlarging
low-
resolution
photos
causes
pixelated
images.reduce the pixels per inch to 300 (note the
pixels are still 2400 x 3000) and lose no image
quality. If you enlarge to 8 by 10 and leave the
ppi at 600, the image will blur slightly and
continue to do so each time you attempt to
resize larger without reducing the ppi.
It’s important to distinguish resizing from
a feature you’ll find in Adobe Photoshop
(and some of the other editing programs)
called “resampling.”
The paragraph above is an example of
Resizing; that is, the number of pixels in the
image do not change and; therefore, the
image quality remains intact. Resampling
changes the image by adding more pixels
(upsampling) or subtracting pixels(downsampling), which means
adding or deleting information
and detail from your image.
Unfortunately this is not a precise
process, which is why Photoshop
provides three Resampling
options: Bicubic, Bilinear, or
Nearest Neighbor. There is no
“right way” or “correct answer” to
this process. All you can do is
experiment and save the image
with the best results.- HOW TO REMOVE BUSY
BACKGROUNDS
Editing out unwanted background imagery
is always a challenge. You can use the
Polygonal Lasso tool to select the object in
the foreground, then invert the image to
make the background the active layer, then
press the Delete key. Or you can cut-and-
paste the image onto a new layer and
choose a special effect to fill the
background, such as Gaussian Blur or
Motion Blur, or choose a nice filter.
Another option is to use the Pen Tool
to outline the object and create a Clipping
Path. Once the object is completely
outlined, press and hold the Ctrl key, and
simultaneously click the Vector Mask on
the Layers palette. The marquee surrounds
the selected area. Move your cursor to the
background layer, invert the image, then
press the Delete key. Both options