Lesson 3. saving digital
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Transcript of Lesson 3. saving digital
Saving PhotosIn Digital FormatWhy To Save & How To Save CorrectlyBy Methlal Weerasooriya
The Importance of Saving
There are two kinds of computer users - those who have lost digital photos and those who will…QuickTime™ and a
TIFF (Uncompressed) decompressorare needed to see this picture.
Save Your Photos Right!
There are many wrong ways to save photos…To save them correctly you must have the correct:File TypeImage Modedpi / ppi
QuickTime™ and aTIFF (Uncompressed) decompressor
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Save As…File Type
There are several common file types used in photography, printing, video and on the internet such as: .gif, .jpg-jpeg, .tif, .png
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Save As…File Type
TIF - Tagged Image File format is a lossless compression format developed by Adobe for photos. It is one of the main standards in the printing business.
Save As…File Type
JPEG - File type created by the Joint Photo Experts Group. It is a lossy compression style, but it is the least lossy and is standard on most cameras.
Save As…File Type
GIF - Graphics Interchange Format. This is an 8-bit file format created by Compuserve specifically for small images to be used on the Internet. I also allows for animated images.
Save As…File Type
PNG - Portable Network Graphics. This is a 24-bit graphic format created by Unisys to replace GIF files on the Internet. It also supports transparency, which GIF does not.
Save As…Image Mode
There are several common file modes used in photography, printing, video and on the internet such as: bitmap, RGB, CMYK, and grayscale
Save As…Image Mode
Bitmap is a very old style of graphics very similar to halftones used in newspapers created with dots
Save As…Image Mode
RGB is a color mode used in photography and on video screens. RGB stands for Red, Green and Blue. It is used to see photographs on a computer or TV screen and on the Internet. All web photos must be in RGB mode.
Save As…Image Mode
RGB is an additive color mode. If you add red to blue you get purple. The concept is that all three light colors add up to create white light.
Save As…Image Mode
CMYK is a color mode using in photography and printing. CMYK stands for Cyan, Magenta, Yellow and Black.
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Save As…Image Mode
CMYK is a subtractive method of color because you subtract a percentage of an ink color in order to get a lighter shade.
Save As…Image Mode
Grayscale is more commonly called black and white. This is mainly used in printing for newspapers or magazines instead of color.
Save As…Dots Per Inch
Dots Per Inch is actually a printing term and in photography it should be expressed as pixels per inch. Both are somewhat used interchangeably, but there is a difference between square pixels and round dots.
Save As…Dots Per Inch
In general standard TV pixels are round as are the dots created by ink jet and laser printers. New HDTV pixels are square as are the pixels on computer monitors.
Save As…How many dpi?
The number of dpi is important and is based on the final use of the photo.
In general:Web: 72 dpiNewspaper: 200 dpiMagazines: 300 dpi