Graphics Programs Reference
In-Depth Information
Adjusting image size
Next you will adjust the image size for printing. When printing an image, you generally
want a resolution of at least 150 pixels per inch. For higher-quality images, you will want a
resolution of at least 300 pixels per inch. While this image was saved at 72 pixels per inch,
it is larger than needed. By reducing the physical dimensions of the image, the resolution
(number of pixels per inch) can be increased.
1
Choose Image > Image Size; the Image Size dialog box appears. The image currently
has a resolution of 72 pixels per inch.
The image is at a low resolution of 72 pixels per inch.
This low resolution af ects the image quality, and should be increased to print the best
image possible. For this to occur, the dimensions of the image will need to be reduced
so the image will be of a higher resolution, but will be smaller in size.
Resampling changes the amount of image data. When you resample up, you increase the
number of pixels. New pixels are added, based upon the interpolation method you select.
While resampling adds pixels, it can reduce image quality if it is not used carefully.
2
In the Image Size dialog box, uncheck Resample Image. By unchecking the Resample
Image checkbox, you can increase the resolution without decreasing image quality.
You can use this method when resizing large image i les, like those from digital
cameras that tend to have large dimensions but low resolution.
3
Ty p e
300
in the Resolution i eld. The size is reduced in the Width and Height text
boxes to accommodate the new increased resolution but the Pixel Dimensions remain
the same. For quality printing at the highest resolution, this image should be printed
no larger than approximately 2.9 inches by 1.8 inches. Press OK.
