Flashcards · 0417 · Topic 12

Images flashcards

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Why keep the aspect ratio locked when resizing an image?: It keeps the width and height in proportion. Changing them by different amounts stretches or squashes (distorts) the picture.
An image of 3200 × 2400 pixels is resized to 800 pixels wide, keeping its proportions. What is its new height?: Scale factor 800 ÷ 3200 = 0.25, so the height is 2400 × 0.25 = 600 pixels.
What does text wrapping control? Name three options: How the surrounding text behaves around an image. Options: in line with text, square, tight, top and bottom, behind text, in front of text.
What is cropping?: Removing unwanted edges of an image to change what is visible, without stretching it.

How do you calculate the size of an uncompressed image in bytes?: Width × height × bits per pixel ÷ 8.
Name four ways to reduce an image's file size: Resize it to smaller pixel dimensions; crop it; reduce the resolution; reduce the colour depth; save it in a compressed format such as JPEG.
What is the trade-off when reducing an image's file size?: Quality falls: an image that is too small or too compressed looks blurred or blocky when enlarged or printed.
Why save a reduced image under a new name?: So the original full-quality image is kept and can be used again later.