Search Results for "image format"

As the standard image PNG was designed to replace GIF as the standard image format for the comprehension on the internet. The comprehension of PNG is better than GIF it has got full alpha transparency and gamma correction, the common browsers support PNG, and it is recommendation of the W3C. In one way the binary transparency is equal. Research is done taking three simple graphics the first one is the palate of 64 colors, and the next one with 128 colors and these are compressed in three different ways, in Photoshop when compared the pictures with one

PNG  is used for images it is a file format, it can be used by everyone it is a free file there are many advantages in using PNG, the minor advantage only that it can be used by anybody, the present PNG format is the replacement of the older PNG format and in few ways it is the replacement of the TIFF format also. The PNG is used mainly in things they are World Wide Web and image editing. PNG is considered to be the better one when it is compared to GIF, it has got alpha channels that has transparency and gamma corrections which corrects the

PNG is a file format used especially for images. It is a free file format, meaning that it can be used by everyone in any way he wants it without paying any royalties to anyone. But this is not the main advantage of PNG, I would even call it a minor advantage, as the end-users do not quite feel it. The PNG format was intended to be a replacement for the older PNG format and, in some ways, to the TIFF format. It's mainly used in two areas: World Wide Web and image-editing. On the Web, PNG is much better that GIF. It has included

In 1977 and 1978, two Israeli researchers, Jacob Ziv and Abraham Lempel worked on a set of compression algorithms, which were later named LZ77 and LZ78. Later, in 1983, Terry Welch from Sperry (which later merged with Burroughs to form Unisys) developed a very fast variant of LZ78 called LZW. Welch, together with two IBM researchers, Victor Miller and Mark Wegman, filled for a patent for LZW. At the same time, Compuserve, specifically Bob Berry, was designing a new algorithm for a compressed image format, where they used the LZW

This material is intended to inform the simple users about the features of the PNG format. So, it will pass over some details like for example the freedom from patents, as this has no connection to the end-user, being more of a concern for the developers. The PNG format was intended to be used like a substitute for the GIF and TIFF formats. So, it was created with two main ways of usage in view: World Wide Web Image editing PNG can be widely used for the web, having several advantages over the GIF format: the possibility of

"For the Web, PNG really has three main advantages over GIF: alpha channels (variable transparency), gamma correction (cross-platform control of image brightness), and two-dimensional interlacing (a method of progressive display). PNG also compresses better than GIF in almost every case, but the difference is generally only around 5% to 25%, not a large enough factor to encourage folks to switch on that basis alone. One GIF feature that PNG does not try to reproduce is multiple-image support, especially animations; PNG was and is intended to be a

While this article is directed towards cartoonists and online comic makers, there are still many valuable tips for anyone who would like to use animated PNG on their web sites. "PNG's strengths are well suited for online cartoons: It can handle truecolor graphics (millions of different colors), while GIF can only display 256 different colors. Therefore PNG comics can look much more vivid than GIF comics. PNG compression is lossless, which means that unlike JPEGs, there is no degradation of image quality when you save a cartoon. You won't see

To answer our questions about image types for your web page, Jeff Atwood is there. "When it comes to image formats on the internet, it's generally a three-way tie between JPEG, GIF, and PNG. Deciding which image format to use is relatively straightforward; you choose lossy JPEG when you're saving continuous-tone photographic images, and you choose between lossless GIF or lossless PNG when you're saving images with large blocks of the same or similar colors. See my comparison of GIF/PNG and JPEG if you're not clear on what the difference is. But the

This page is an attempt to provide an easily digested PNG status board--basically a place to come and see how PNG currently fares for those who haven't been keeping up with the news page or mailing lists. It grew out of an article submitted to Slashdot in February 1999 (with a followup in June 2000), but it is intended to be more dynamic and has been redesigned accordingly. Stability: excellent * * * * * The PNG specification has proven to be exceptionally solid. There have been two minor updates since the 1.0 release--to clarify gamma handling and to

Introduction This document proposes an image format for storing full-color image values in 16-bit pixels. The data representation itself need not be in a PNG (Portable Network Graphics) envelope, but PNG does provide a natural and widely accepted framework for this proposal. PNG is now one of the three image formats supported by the major browsers (Netscape and Internet Explorer), and Microsoft has even declared it to be its primary lossless image format within the Office 98 software suite. Why 16 bits? Well, 8 bits per pixel is inadequate for

# Introduction The png-16 image format stores imagery in 16-bit pixels. It is being developed to offer several unique benefits: * losslessly compressed true-color imagery in smaller files then 24-bit color * provide a display space for color imagery indistinguishable from 24-bit color * provide an analytical and display space for grey imagery up to 12 bits per pixel * allow deep grey and true color to co-exist in less than 48 bits per pixel * add extra image features such as: o positive and negative transparency o extremely flexible color