Resizing
Resizing can reduce or increase the number of pixels in the
image (resampling the image). This reduces or increases the file size both in
display and when saved as a file.
You can specify the image width/height you want in terms of
pixels, percentage (of the original image) or even in inches and centimeter. If
your aspect ratio checkbox is checked on, you need to specify only one of the
width or height. The other one is adjusted automatically.
Resolution is the number of pixels printed per inch.
More pixels per inch (ppi), will create smaller printed pixels and a smaller
printed image. Fewer ppi, will create larger printed pixels and a larger printed
image. Resizing can also change the image’s resolution, leaving the number of
pixels in an image (and the file size) unchanged.
Resize Algorithms are different algorithm which can be
used to resize the image. Fast resizing chooses an image-scaling
algorithm that gives higher priority to scaling speed than smoothness of the
scaled image and the resized image is somewhat jagged. Smooth
resizing chooses an image-scaling algorithm that gives higher priority to
image smoothness than scaling speed. But it may make an already smooth image too
smooth. Area Average resizing as the name suggest, uses the Area
Averaging image scaling algorithm that takes into consideration the neighboring
pixel values and their weightage. In Replicate resizing the pixels in
the source image are sampled to produce pixels for an image of the specified
size by replicating rows and columns of pixels to scale up or omitting rows and
columns of pixels to scale down.
Maintain Aspect Ration: To
constrain the new image dimensions to the image’s current proportions, mark
the Lock Aspect Ratio check box. The aspect
(width-to-height) ratio defaults to the ratio of the active image. Changing the
aspect ratio distorts the image by stretching or contracting it in one dimension
more than the other.
For best results:
- Don’t increase an image’s size more
than 25 percent. Increasing the size of an image causes a loss of detail and
sharpness.
-
Only resize an image once. If your first
resize is not correct, undo it and try again.
-
Correct and retouch images before resizing.