Choosing the Right File extensions for Image

When working with Adobe Photoshop, there are several options for saving documents in various file formats and compression.
It is difficult to distinguish between one format to another. Sometimes it is also wrong in choosing the file format, because each file format has its advantages and kekurangan.Juga indeed, each file format should be used appropriately. For example, for the purpose of your website is recommended to use file format jpg, png, and gif. Why?

Adobe Photoshop supports the exchange of documents from other programs, including: Adobe Illustrator, Macromedia Freehand, Macromedia Fireworks, Adobe PageMaker, Adobe After Effects, Corel PhotoPaint, CorelDraw, 3D Studio Max, and others. Techniques such document exchange file format by saving the appropriate and acceptable to the programs mentioned above. Here's an explanation of some file format for storing documents in Photoshop.

PSD (Photoshop Document)
This file format is the native format of Adobe Photoshop documents. This format is able to store information layers and alpha channel contained in an image, so that a time can be opened and edited again. This format is also capable of storing images in some fashion colors provided by Photoshop. You can save this file format if you want to edit it again.

BMP (Bitmap Image)
This file format is a flexible graphical format for the Windows platform so it can be read by any graphics program. This format is able to store information until the quality level of 1 bit 24 bits. Weakness of this file format is not able to store the alpha channel and no obstacles to the exchange platform. To create an object as desktop wallpaper, save your document with this file format. You can compress this file format with RLE compression.
This file format can store the images in color modes RGB, Grayscale, Indexed Color, and Bitmap.

EPS (encapsuled Postcript)
This file format is a format often used for the exchange of documents between the graphics program. In addition, the file format is often used when you want to print the picture. Advantages file format is used so that the postscript language file format is recognized by almost all programs print preparation.
Weakness of this file format is not able to store the alpha channel, so that many users of Adobe Photoshop using this file format when the image is done is final. This file format can store pictures in color modes RGB, CMYK, Lab, duotone, Grayscale, Indexed Color, and Bitmap. Besides these file formats are also able to save a clipping path.

JPG / JPEG (Joint Photographic Expert Group)
This file format can compress objects to the level of quality in accordance with the options provided. The file format is often used for storing images to be used for web pages, multimedia, and other electronic publications. This file format can store pictures in color modes RGB, CMYK, and Grayscale. This file format is also capable of storing alpha channel, but because of its orientation to the electronic publication format is relatively smaller size compared to other file formats.

GIF (Graphic Interchange Format)
This file format can only save in 8 bit (only supports Grayscale color modes, Bitmap and Indexed Color). This file format is a standard format for electronic publishing and the Internet. The file format is capable of storing two-dimensional animation that will be published on the internet, web page design and electronic publications. This file format can compress to a small size using LZW compression.

TIF (Tagged Image File Format)
This file format can store the image quality of up to 32 bits. This file format can also be used for the purposes of exchange between platforms (PC, Machintosh, and Silicon Graphics). This file format is one of the selected format and is preferred by computer users, especially graphics-oriented publications (print). Almost every program that can read bitmap file format is also capable of reading TIF file format.

PCX
This file format was developed by a company called Zoft Cooperation. This file format is a flexible format because almost all programs in a PC capable of reading images with this file format. This file format can store information of 1 bit depth to 24 bit but was unable to save the alpha channel. This file format can store pictures in color modes RGB, Grayscale, and Indexed Color Bitmpa.

PDF (Portable Document Format)
This file format used by Adobe Acrobat, and can be used by the pixel and vector based graphics. This file format can store pictures in color modes RGB, CMYK, Indexed Color, Lab Color, Grayscale, and Bitmap. This file format can not save alpha channel. This file format is commonly used JPG and ZIP compression, except for Bitmap color mode is used CCIT.

PNG (Portable Network Graphic)
This file format serves as an alternative to the GIF file format. This file format is used to display the objects in a web page. The advantage of this file format than GIF is the ability to save files in the bit depth to 24 bit and be able to produce the background (background) are transparent with a smooth edge. This file format can store the alpha channel.

PIC (Pict)
This file format is a standard in the Macintosh graphics applications and text processing program with high quality for the transfer of documents between applications. This file format can store images in RGB color mode with alpha channel 1 and Indexed Color, Grayscale and Bitmap without alpha channel. This file format also provides a choice between 16-bit and 32-bit RGB color mode.

TGA (Targa)
This file format is designed for the platform using the Targa True Vision Video Board. This file format can store images in RGB color mode in 32 bit and one alpha channel, as well as Grayscale, Indexed Color, and RGB in 16 or 24 bit without alpha channel. This file format is useful untuk save documents from the rendering of the animation program with a sequence of output results as 3D Studio Max.

IFF (Interchange File Format)
This file format is commonly used to work with the Video Toaster and the exchange of documentation of Comodore Amiga System. This file format is recognized by almost all graphics programs contained in the PC and be able to save the image with color mode of bitmap. This file format can not save alpha channel.

SCT (Scitex Continuous Tone)
This file format is used to store high-quality documents on Scitex computers. This file format can store pictures in color modes RGB, CMYK, and Grayscale but was unable to save the alpha channel.

PXR (Pixar)
This file format for document exchange with the Pixar Image Computer. This file format can store pictures in RGB and Grayscale color modes with 1 alpha channel.

RAW
This file format is a flexible file format for document exchange between applications and platforms. This file format can store color modes RGB, CMYK, and Grayscale with alpha channel 1 and Multichannel color mode, Lab color and duotone without alpha channel.

DCS (Desktop Color Separation)
This file format was developed by Quark and is a standard format. Eps. This format can store pictures and Multichannel color mode CMYK with alpha channel 1 and channel a lot of spots. This file format can save a clipping path and are often used to process printing (publishing). When saving files in this format is to be stored is 4 channels of the image and preview channel 1.

COMPRESSION FORMAT
Some programs are oriented primarily on electronic publishing and multimedia file format always requires small so that when opened will not be slow. For purposes of the required compression.
The following file formats are oriented electronic publishing and multimedia compression respectively.

RLE (Run Length Encoding)
This compression can compress files without losing detail. Used by Adobe Photoshop, TIFF, and most programs in Windows.

LZW (Lemple-Zif-Welf)
Just like RLE compression, compression is also able to compress files without losing detail. Compression is used by TIFF, PDF, GIF, and format support the postscript language. Compression is very good for compressing images with large areas using one color.

JPG (Joint Photographic Experts Group)
These formats compress the file by removing detail. This file format is often used by the JPG, PDF and postscript format using language. This compression is best used for images with continuous tones like photos.

CCIT
CCIT is an abbreviation of the French language in English is called the International Telegraph and Telekeyed Consultive Committee.
Compression is used to compress black and white images, and can compress files without losing detail. Compression is often used by the PDF and other formats using postscript language.

NOTE

When storing documents in file formats that can not retain information layer, then you have to change the image into image flaten first.

File format that can store duotone color mode is EPS, RAW, and PSD. Therefore, when you want to save in another format then you must change the first color mode, the RGB when the document does not want printed, because the duotone information will be broken down into RGB.

Yan file formats can store Color Lab color mode is PSD, RAW, TIF, PDF, and EPS. File format that can store CMYK color mode is PSD, RAW, EPS, TIF, JPG, PDF, SCT dam.

Indexed Color Color Mode can store multiple file formats appropriate setting its indexed color.

Dapatdisimpan RGB color mode at all file formats that exist in Adobe Photoshop.

The format recommended by the professional designers are
PSD = for documents that still want to edit again
EPS = to have final documents for print preparation
JPG compression = to print above 8 bits and for photos on the web with compression under 5.
GIF = for illustrations and animation on web pages.
TIF = to print, the exchange of documents between platforms and animated sequences

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