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Colour mode, size of image, output resolution and image-file
destination are all to be carefully considered before starting any new painting job. It is not advisable to change
above attributes later as the image quality will suffer and deteriorate.
Spend a good time for planning your image and give the right properties from the very beginning and you will not
get any unexpected surprises in the end of your creation.
See: WORKING WITH OBJECTS ! |
Resolution
Resolution defines the amount of detail that an image file contains, or that an input, output, or display device
is capable of producing. Resolution is measured in dpi (dots per inch) or ppi (pixels per inch). Low resolutions
can result in a grainy appearance; high resolutions can produce higher quality images but result in larger file
sizes. Higher resolution images contain smaller and more densely packed pixels than lower resolution images.
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72 dpi
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360 dpi
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You can change the resolution of an image. Resolution
is measured by the number of dots per inch (dpi) when the image is printed. The resolution you choose depends on
how the image is output. Typically, images created only for display on computer monitors are 96 or 72 dpi and images
created for the World Wide Web are 72 dpi. Images created for printing on desktop printers are generally 150 dpi,
while professionally printed images are usually 300 dpi.
Output resolution
Output resolution defines the number of dots per inch (dpi) that an output device, such as an imagesetter or laser
printer, produces.
Image resolution
ppi - pixels per inch (2.54cm x 2.54cm)
Image resolution is the number of pixels per inch in a bitmap measured in ppi (pixels per inch) or dpi (dots per
inch). Typical Internet image resolution is at 72 ppi and display device at 96 ppi. Low resolutions can result
in a grainy appearance to the bitmap; high resolutions can produce smoother images but result in larger file sizes.
Printer resolution
dpi - dots per inch (2.54cm x 2.54cm)
dpi is a measure of a printer's resolution in dots per inch. Typical desktop inkjet printers print at 300 dpi and
laser printers print at 600 dpi. Image setters print at 1270 or 2540 dpi. Printers with higher dpi capabilities
produce smoother and cleaner output. The term dpi is also used to measure scanning resolution and to indicate bitmap
resolution.
You can change the resolution of an image to increase or decrease its quality and file size.
Increasing resolution
Higher resolution images contain smaller and more densely packed pixels than lower resolution images. Upsampling
increases the resolution of an image by adding more pixels per unit of measure. Image quality may be reduced because
the new pixels are interpolated based on the colors of neighboring pixels; the original pixel information is simply
spread out. You cannot use upsampling to create detail and subtle color gradations where none existed in the original
image. When you increase image resolution, the image size increases on your screen; by default the image maintains
its original size when printed.
Decreasing resolution
Downsampling decreases the resolution of an image by removing a specific number of pixels per unit of measure.
This produces better results than upsampling. Best results are usually achieved when downsampling is done after
correcting an image's color and tone but before sharpening.
There are plenty of image editing programs available and finding the right one that suits to your needs will be
a tedious task but there is a one common thing with all of these programs, the basic image editing procedures that
apply to all of them.
You can download the free image editing programs from the Cnet Download Center.
CORELDRAW IS HIGHLY RECOMMENDED BY KEPCIL !
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Any questions or inquiries may be e-mailed to keppanet@hotmail.com.
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