Digital Imaging
Student will learn the differences in bitmap and vector images, how to resize images, and the difference in scaling and resizing an image.
Author kruss
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internet page
1Image Size and Resolution
This article discusses the relationhip between an image's resolution and print size and the proper method of resizing images that have been scanned. Read the article below. When finished, you should understand the concept of pixels, resolution, and resampling.
http://espressographics.com/text/imagesize.html
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internet page
2Facts About Bitmap Images
Bitmap images are also known ad raster iimages. In this article you will explore the properties of bitmap images and the differnce in scaling and resizing.
http://graphicssoft.about.com/od/aboutgraphics/a/bitmapvector.htm
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internet page
3Facts About Vector Images
Vector images are scalable, resolution independent images. This article discusses also the advantages and disadvantages of vector images.
http://graphicssoft.about.com/od/aboutgraphics/a/bitmapvector_2.htm
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personal page
4Image Size and Resolution, Bitmap and Vector Images Question Sheet
Directions: Select the text below. Copy and paste the text into a Word document. Answer the questions, print, and turn in.
Image Size and Resolution Name
1. What happens to a image once it has been scanned?
2. What is a digitized image made up of?
3. What are pixels?
4. What is resolution?
5. What does PPI stand for?
6. In comparing an image with 72dpi and 300 dpi, which one has the better resolution?
7. What do we mean by an image’s print size?
8. What happens to the image's resolution when one makes a change to the image's width or height and the Resample Image Box is checked in the image editing program?
9. When the Resample Image box is checked, what are you doing to the image?
10. What is the best way to increase the width and height of a scanned image?
Facts About Bitmap Images
1. What are bitmap images also known as?
2. How many pixels per inch does a typical monitor have?
3. Are bitmap images resolution dependent or independent?
4. What happens when one reduces the size of a bitmap image by using the resample or resize command?
5. What happens when one increases the size of a bitmap image by using the resample or resize command?
6. What is scaling?
7. What is the difference in scaling and resizing by using the resize command in an editing program?
8. What happens to the number of pixels when an image is scaled?
9. What type of images are scanned images and images from a digital camera?
Facts About Vector Images
1. What are vector images made up of?
2. How are these objects defined?
3. Why are vector images resolution independent?
4. Give a type of vector object.
5. What are vector images unsuitable for?
6. What do you need to save a vector file as a bitmap?
7. What is rasterizing?
8. What should one do before converting a vector graphic to a bitmap?
9. Why would one want to convert a vector graphic to a bitmap?