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WorksheetsComputer Graphics Essentials
Total questions: 22
Worksheet time: 11mins
Refers to the sharpness and clarity of an image, measured in terms of ppi and dpi.
(Digital Imaging Basics by Melanie Cofield)
Resolution
Pixel
Quality
What is ppi?
(pages per inch)
Measurement used for images listed on screen
(pixels per inch)
Measurement used for images printed on printer
(pixels per inch)
Measurement used for images displayed on screen
What is dpi?
(image from http://www.pn-design.co.uk/design_blogs/images/dpi-as-mosaic.jpg)
(dots per inch)
Measurement used in printing images.
(dots per inch)
Measurement used in displaying images on screen.
(data per inch)
Measurement used in calculating images size.
When resolution increases,
images become less crisp and pixelated
images become more sharp and crisper
The smallest portion of an image or display that a computer is capable of printing or displaying.
pixel
resolution
color
The color model for display devices (monitors, digital projectors, etc.) Each displayed color is determined by a
combination of ...
CMYK
RGB
LED
LCD
The color model used for printing standard colors.
CMYK
RGB
LED
LCD
Images that have data that describe the color of each pixel. Larger display sizes equal larger file sizes in this type of image.
(Digital Imaging Basics by Melanie Cofield)
Vector Image
Bitmap Image
The lines and blocks that create the image are defined by their start and end points, not by a number of pixels or dots, so they can be resized without any loss of quality.
(http://www.corbaecreative.com/2014/08/06/vector-graphic/)
Vector Image
Bitmap Image
Which of the following is a vector image?
(Image from http://vektorrascheln.de/photos/inkscape_einsteiger_teil_i/vektor_raster_vergleich-pixelig-o.jpg)
Which of the following is a bitmap image?
(Image from http://vektorrascheln.de/photos/inkscape_einsteiger_teil_i/vektor_raster_vergleich-pixelig-o.jpg)
Which of the following is not transforming an image?
Scale
Rotate
Flip
Zoom
We are given this image.
Which of the following is a cropped image?
We are given this image.
Which of the following is a flipped image?
Standard Windows bit-mapped graphic image format file.
png
jpg
gif
bmp
We want to save an animated logo with a very low file size. We used color palette of 256 colors.
Which if the following file format allows as to do that?
png
jpg
gif
bmp
We want to save an image with high quality for desktop printing, medium quality for web viewing and low quality for email. No need to have a transparent color support.
Which format is ideal to use?
png
jpg
gif
bmp
We are designing a logo and we want the logo keep its quality, do not pixelate when it is enlarged.
Which file format allows us to do that?
png
jpg
svg
bmp
We want to separate different elements of an image. This will allow us to work easily on the selected element without spoiling the other elements.
Where should we put each element?
Separate layers
Separate files
Separate frames
Which of the picture is a raster (bitmap) image?
(converted with https://vector-conversions.com)
The one on the left
The one on the right
Which of the picture is a vector image?
(converted with https://vector-conversions.com)
The one on the left
The one on the right
You see a short animation.
This animation contains a single frame. (True or False)
True
False
