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 Patients Icon |
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Add Patients icon to cartIcon sizes: 48x48, 32x32, 24x24, 20x20, 16x16, 256x256, 512x512
File formats: ICO, GIF, PNG, BMP
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What Are PNG Icons?
A number of independent vendors are supplying custom icons in sizes and resolutions standard to certain computer platforms. The article explains what icons are, how they are designed and implemented in various systems, and what standards exist for Windows icons, Mac icons, and PNG icons.Computer icons are incorporated into any modern GUI. Icons are small pictograms of standardized sizes that visually represent objects, actions, and other concepts. In graphical user interfaces, icons are used as a quicker, more intuitive way to communicate with the user. Icons depicting typical elements of a user interface are better visible than text, can be recognized faster, and are certainly easier on the eyes.
Originally developed in 1970 by the Xerox Research Center and widely deployed by the Mac OS and Microsoft Windows platforms, icons make computer novices feel more comfortable with computer systems, learn quicker and work more efficiently. Icons can be employed to replace or supplement text commands. Commonly used in menus, toolbars, on buttons and in the latest ribbon-type user interfaces, icons have come a long way from the original concept.
There are multiple graphic formats for storing icons. The Windows systems use Windows icons in the platform-specific ICO format. Apple Macintosh systems store Mac icons in their specific formats, while Unix-based systems employ PNG icons for most applications. As such, icon software is generally available for the Windows and Apple platforms, while Unix users can create PNG icons with just about any graphic editor.
As a rule of thumb, icons are square pictures that come in a number of standard sizes and color resolutions. Most platforms support icon sizes of 16x16 to 128x128 pixels, while some platforms readily accept icon images as large as 512x512 pixels. The big 512x512 pixel icons were first employed in Mac OS Leopard.
Pixel resolutions of all icons are platform dependent. For example, Windows icons are defined as images in 16 and 256-color gammas as well as True Color images with alpha channel. Windows icons come in standard resolutions of 16x16, 32x32, and 48x48 pixels. Windows Vista implements new standards for Windows icons, including icons in sizes of up to 256x256 pixels in True Color only. Optionally, icons of 128x128 and 512x512 pixels are supported. Interestingly, the higher resolution versions of Windows Vista icons are stored in compressed PNG format instead of Windows ICO used in older versions of Windows and for lower resolution images. Other platforms such as Windows Mobile can use standard icons of other resolutions, e.g. 24x24 pixels.
Numerous independent vendors are offering custom icons. Aha-Soft offers a variety of Windows icons, Mac icons, and PNG icons in all sizes and resolutions common to those systems. The company sells royalty-free icons individually and in matching sets incorporating icons drawn a common style or theme.
Copyright © 2005-2012 Aha-Soft. All rights reserved.
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