Chapter 4 - Images

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Chapter 4 - Images by Mind Map: Chapter 4 - Images

1. Still images

1.1. Bitmaps (Painting program)

1.2. Vector (Drawing program)

2. Vector

2.1. Computer-aided design (CAD) programs needed by architects and engineers

2.2. Graphic artists designing for the print media

2.3. 3-D animation programs

2.3.1. Changes of position

2.3.2. Rotation

2.3.3. Shading of light

2.4. Applications requiring drawing of graphic shapes

3. Vector-drawn images VS. Bitmaps

3.1. Vector images- less memory, smaller file size compared to Bitmaps

3.2. For the web, pages that use vector graphic in plug-ins download faster and, when used for animation, draw faster than bitmaps

3.3. Vector objects are easily scalable without loss of resolution or image quality

3.4. Resizing a bitmapped image requires either duplicating pixels, while vector image, a rescaled image retains the quality of the original

3.5. Vector image cannot be used fot photorealistic images

3.6. Vector images required a plug-in for web-based display

3.7. Bitmaps are not easily scalable and resizeable

3.8. Bitmaps can be converted to vector image using autotracing

3.9. Vector cannot have texture, it can only have plain colour

4. Bitmap

4.1. A data matrix that describe the characteristics of all the pixels making up an image

4.2. Bitmapped images can have varying bit and color depths

4.3. Made up of individual dots or picture elements known as pixels or pels

4.4. An image format suited for creation of

4.4.1. Photo-realistic images

4.4.2. Complex drawings requiring fine detail

4.5. Legal rights protecting use of images from clip art galleries fall into three basic groupings

4.5.1. Public domain images

4.5.2. Royalty-free images

4.5.3. Right-managed images

5. 3-D drawing

5.1. Modeling

5.1.1. Placing all the elements into 3-D place

5.2. Extrusion

5.2.1. The shape of a plane surface extends some distance

5.3. Lathing

5.3.1. A profile of the shape is rotated around a defined axis

6. Rendering

6.1. Use of intricate algorithms to apply user-specified effect

7. Colour and palettes in Multimedia

7.1. Additive color

7.1.1. Computer display purpose

7.1.1.1. RGB

7.2. Subtractive color

7.2.1. Printing purpose

7.2.1.1. CMY

7.3. Color models

7.4. Dithering

7.4.1. Process whereby the color value of each pixel is changed to the closest matching color value in the target palette