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

are needed to see this picture.

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


Bitmap is a very old style of graphics very similar to halftones used in newspapers created with dots


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.


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.


CMYK is a color mode using in photography and printing. CMYK stands for Cyan, Magenta, Yellow and Black.

QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.


CMYK is a subtractive method of color because you subtract a percentage of an ink color in order to get a lighter shade.


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

Education

Lesson 3. saving digital