Presentation Transcript

1. Chapter 6: Multimedia

   By: Hannah, Emily, Ashley, Spencer, and Kate ITGS 1st period 4/1/2014
2. Multimedia: Computer graphics, video, audio, and interactive applications – is used extensively in many areas of application from computer games and films to advertising, television work, and scientific work.
3. Bitmap Graphics A.K.A: Raster Graphics Images that are composed of a rectangle of small dots (Pixels) ex. Pictures Higher number of pixels = higher resolution
4. Editing Tools: Cropping, scaling, flipping and rotating are a few of the main tools used to edit a picture. A resulting image of two images being merged together is known as a composite image
5. Social Impact: Photo Editing software enhances the quality of photos, however there are many incidences of falsified images; these incidences are becoming harder to detect.
6. Health and Leisure Males and Females are pressured by photos of models whose photos have been retouched. The American Medical Association campaigned for guidelines. The French Government is so concerned that they are attempting to legislate against photos that do not have “Health Warning” attatched.
7. Legal Impacts Altering photos as a way to have evidence against one person Ex. OJ Simpson trial is a photo of a bloody shoe print, which would essentially link OJ to the crime. But due to the limited ability to verify originality of the photo, it was never presented in courts.
8. Digital Fakes: Manipulating photos using copy and paste and cloning tools, these photos are impossible to take. Inconsistencies and lighting can reveal FAKE FRAUD
9. Bit Depth: The # of bits used to store each pixel Storage requirements: width x height x bit depth Image Storage: Resolution: # of pixels in grid All bitmaps are stored as rectangular grid of pixels Megapixels: one million pixels (How digital cameras quote it in this)
10. Most file formants use compression to reduce redundant, repetitive data to reduce storage space
11. Lossless Compression – looks for repetition and stores them in a manner that takes up less space but allows the original data to be restored. Lossy Compression – sacrifices image quality for less space Zip File – Compressed file format for general data ANY TYPE OF DATA CAN BE COMPRESSED
12. PPI (Pixels Per Inch) The # of Pixels Per Inch of an image – has an affect on the image resolution, bit depth, and compression all affecting its image quality. The PPI determines how many pixels are displayed in each inch of the output – whether it on screen or on paper; this determines the physical size of the output and how sharp the image will appear
13. DPI (Dots Per Inch) Dots Per Inch A.K.A printer resolution Refers to the number of ink dots that a printer produces when creating an image. This isn't necessarily the same as PPI because a printer may produce more than one ‘dot’ to print every pixel
14. Vector Graphics Composed of objects rather than pixels Everything is based upon relatively simple mathematical shapes Each object is stored as a series of mathematical equations that define its starting point, ending point, and path, along with information about its color and style. All objects remain separate in the image, meaning they can be edited, scaled, repositioned and re-colored independently at any time.
15. Vector Graphics
16. Graphics in the Movies For work in film or TV, computer generated imagery (CGI) is used to create animations or special effects, more realism is required than CAD work.
17. Types of Formats: Video Formats: MOV MPF WMV Audio Formats: MP3 AAC WAV WMA Image Formats: BMP GIF JPEG
18. MIDI – (musical instrument digital interface) = communication standard for music devices. * does not communicate digital sound information Digital Audio: audio that is digitalized so that it may be placed in an electronic presentation. Sampling Frequency- determines the quality of a recorded sound Bit Rate- amount of data used to represent each second of audio.
19. Digital Video – Video in a Presentation Chrome Key – allows part of a video image to be replaced with another image or video source by removing specific colors Morphing – an image is slowly transformed into a second image over a series of frames. Codec – tells media players how to decode the particular compression format used for video or audio data Streaming Media – video or audio being played while it is downloaded from the internet Buffer – section that is played while another section of the media is being loaded.
20. Intellectual Property Non-physical creations (Stories, music, works of art, and computer software) Copyright law protects this work. Refers not to they physical media, but the work itself.
21. Citing Sources Helps the reader understand the context of the works Shows that you have done research Protects you against accusations of plagarism MLA APA
22. Desktop Publishing & Word Processing Software that allows complex pages of text & graphics to be laid out for publications such as magazines, brochures, and books.
23. Features of Desktop Publishing Master Pages: Consistent Layout and Appearance Templates: Layouts for creating a variety of document types Grouping and Alignment: Positions and formatting PDF: Portable Document Format (distribution)
24. Presentations: Communicate Ideas, Facts, and Opinions Good Presentations have images, videos, charts, and live demonstrations
25. REVIEW: Lossless Compression: When repeated patterns of data are stored in a shorter form to save space Resolution: The number of pixels in an image DPI: The number of pixels that appear per inch in the output of an image Lossy Compression: Data from an image or video is discarded in order to save space
26. WYSIWYG: Displaying documents exactly as they will appear in the final output Bit Depth: The number of colors stored in an image Color Synchronization: Ensuring that an screen image color matches the final output Plain Text: A document which contains only characters, but no formatting data Megapixel: A common way of measuring the resolution of digital cameras