An important role is often neglected in the process of creating files for optimization web. Users with slow Internet connections take longer to load larger images. The optimization of the images before uploading your website will contain this problem and make your pages load more quickly for all users.
If you want to publish your photos online, you can use Photoshop 's built in file compression options. Save For Web option helps the best typeand the best compression for your images. In this chapter, you will save option for the Web, and you'll learn how to compress images effectively.
JPEG
JPEG or Joint Photographic Experts Group, is a name file format. The extension of this format. Jpg. The compression is usually lossy compression, which means that the visual quality lost in the process and can not be restored. JPEG for storing images with millions of colors, like goodPhotographs, drawings and images with many colors, with nuances.
There are variations on the standard baseline JPEG which are lossless, but is not yet widely supported.
There are also many medical imaging systems and create the 12-bit process JPEG images. The 12-bit JPEG format is part of the specifications of the JPEG format for some time, but again, this format is not supported as widely.
There is also an interlaced "Progressive JPEG" format. This format is idealfor large images that are displayed during the download via a slow connection, so that reasonable preview after receiving only a portion of the data. When Progressive JPEG format is used, the data in multiple steps more and more detail is compressed. However, progressive JPEG is not as widely supported.
GIF
GIF is a file format which stands for Graphics Interchange Format and was the first time in 1987 This format is a bitmap. Bitmap images created bya grid of small squares of pixels. The data is stored on each pixel. The GIF format uses a palette of up to 256 different colors from the 24-bit RGB color space. This format also supports animations and allows a separate palette of 256 colors for each frame. The color limitation makes the GIF format unsuitable for reproducing photographs and other images in color, but is no longer necessary for simpler images such as graphics or logos with solid colors.
Photoshopcan control the exact number or color stored in a particular image. This makes it a good format for saving GIF images with limited color, such as tables, graphs and small icons, images, text and other important information, and flat-colored designs.
GIF images were taken with the Lempel-Ziv-Welch (LZW) lossless data compression techniques to the file size without reducing image quality. This compression was patented in 1985 a controversy began in 1994the license agreement between Unisys, the patent holder and CompuServe. The theme has inspired the development of the Portable Network Graphics (PNG) standard. Since that time has expired, all the patents in question. The GIF format is still widely used and acceptable for many tasks in Photoshop.
Tags: images, Optimizing, Photoshop