Corel PaintShop Pro X7, DE User's Guide download pdf (Page 227)

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101

Adjusting images 223

What happens to pixels when you resample an image?

When you use the Resize command to increase the image dimensions,

additional pixels must be interpolated from information in the existing

pixels. Imagine that you have an image of 100  100 pixels, and that

you want to enlarge the image by increasing the number of pixels to

200  200. You begin with 10,000 pixels and after resizing end up with

40,000 pixels. Thus, three-fourths of the final pixels are “made up.”

Most methods of making up pixels involve interpolating the interpixel

gaps produced by stretching the image dimensions. The Pixel Resize

method copies the color of the nearest pixel. The Bilinear method is

based on an average of four neighboring pixels (from a 2  2 pixel

Resampling type Description

Smart Size Chooses the best algorithm based on

the new pixel dimensions you set

Bicubic Minimizes the jaggedness that often

results from expanded, irregular, or

complex images

Bilinear

Uses the two nearest pixels around

each existing pixel to determine the

appearance of newly created pixels

Pixel Resize Duplicates or removes pixels to

achieve the selected width and

height of the image (recommended

for hard-edged images and simple

graphics)

Weighted Average Uses a weighted-average color value

of neighboring pixels to determine

the appearance of newly created

pixels (useful for reducing

photorealistic, irregular, or complex

images)

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Corel PaintShop Pro X7, DE User's Guide Page 227

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