Midterm & File Formats Information
You will be having your Midterm on Wednesday, January 23rd from 10 to 11:10 am. Please review the following information:
There are different file formats for different applications (you don't have to memorize what the abbreviations mean, but do remember these abbreviations):
JPEG (pronounced “jay-peg”) – is the most popular format for images taken with digital cameras. JPEG is an acronym that stands for the Joint Photographic Expert Group (from the International Standards Organization), which created the format and devised it specifically for digital photographs. Also known as JPG. Check the file extensions on your images. Example: IMG.jpg.
The JPEG is an extremely efficient compression* format and is frequently used for images on the World Wide Web. The supreme advantage of the JPEG is that it only stores data for pixels that have color – white pixels require no data. Compression* is high, resulting in small picture files. Some of the image data is discarded in order to reduce the file size, which results in reduced image quality.
GIF: The other major picture file format and certainly the most widespread on the Web is the GIF (Graphics Interchange Format). Generally used for relatively low-resolution images intended for the Web (those you want to post on a website). Compression* is very high and generally, the same picture rendered as a GIF will be far smaller than in any other format.
PNG: The PNG (Portable Network Group) file format is a Web-oriented format designed to retain picture integrity and produce small files. PNG is a bitmap image (digital image) format. PNG has become the third most common image format on the web.
Other file formats are: The TIFF (Tagged Image File Format), which is widely used in professional publishing. The BMP or DIB (device-independent bitmap), which is a bitmapped graphics format used internally by Microsoft Windows (like when you paste an image in the Paint application and save it). And the QuickTime format, which can act as a container for many different types of multimedia (which you already used when you converted your iMovies into QuickTime format.
* Compression: The squeezing of image data that results in smaller picture files.
If you have any questions, please feel free to ask Mrs. Feld.
- What is Digital? What is a digital system? What are binary numbers? What are Bits? Bytes? Kilobytes? Megabytes? Gigabytes? Terabytes? Check the PowerPoint in iLife06 (Server) under Midterm. Review/study your quiz and handouts.
- What is iLife? iPhoto? iMovie? What is the Ken Burns Effect? Handout on the iLife Suite of Products.
- What are Digital Cameras? Main parts of the digital camera. What is resolution? What is a pixel? Megapixel? Multimegapixel? Image sensor? LCD Screen? What does the term pixelated mean? What are bitmaps? Review the puzzles Mrs. Feld gave you. Review your last Quiz. Check the PowerPoint in iLife06 under Midterm.
- What is Photoshop? Filters? Layers? Free-Transform (Command-T)? Desaturate? How do you change the colors of an image in Photoshop? How do you improve images? How do you add a Filter? How do you add Blending Options? How do you select images in Photoshop? Which tools can you use to select images? Commands: Deselect (Command-D), Create a Layer (Command-J), Change Colors (Command-U), Desaturate (Command-Shift-U).
- New material: File Formats. You will see this presentation on Wednesday, January 16th. Copy and paste the information below in a Word Document and print it for yourselves (you can print this whole blog entry if you wish but make sure you copy it and paste it in Word - don't print directly from the website or you'll print like 30 pages or more). What is a JPEG? Which is the most popular format? What is compression? Which is the file format mostly used in the Publishing and Printing industry? Which file format is used for small picture animation?
- There will be a Photoshop exercise. Mrs. Feld will explain later.
There are different file formats for different applications (you don't have to memorize what the abbreviations mean, but do remember these abbreviations):
JPEG (pronounced “jay-peg”) – is the most popular format for images taken with digital cameras. JPEG is an acronym that stands for the Joint Photographic Expert Group (from the International Standards Organization), which created the format and devised it specifically for digital photographs. Also known as JPG. Check the file extensions on your images. Example: IMG.jpg.
The JPEG is an extremely efficient compression* format and is frequently used for images on the World Wide Web. The supreme advantage of the JPEG is that it only stores data for pixels that have color – white pixels require no data. Compression* is high, resulting in small picture files. Some of the image data is discarded in order to reduce the file size, which results in reduced image quality.
GIF: The other major picture file format and certainly the most widespread on the Web is the GIF (Graphics Interchange Format). Generally used for relatively low-resolution images intended for the Web (those you want to post on a website). Compression* is very high and generally, the same picture rendered as a GIF will be far smaller than in any other format.
PNG: The PNG (Portable Network Group) file format is a Web-oriented format designed to retain picture integrity and produce small files. PNG is a bitmap image (digital image) format. PNG has become the third most common image format on the web.
Other file formats are: The TIFF (Tagged Image File Format), which is widely used in professional publishing. The BMP or DIB (device-independent bitmap), which is a bitmapped graphics format used internally by Microsoft Windows (like when you paste an image in the Paint application and save it). And the QuickTime format, which can act as a container for many different types of multimedia (which you already used when you converted your iMovies into QuickTime format.
* Compression: The squeezing of image data that results in smaller picture files.
If you have any questions, please feel free to ask Mrs. Feld.
posted by Karol B. Feld at
4:57 AM
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