Information on Image File Formats


Image file formats are standardized means of organizing and storing digital images. Image files are composed of digital data in one of these formats that can be rasterized for use on a computer display or printer. An image file format may store data in uncompressed, compressed, or vector formats. Once rasterized, an image becomes a grid of pixels, each of which has a number of bits to designate its color equal to the color depth of the device displaying it.
  • JPEG (or JPG, for the file extension; Joint Photographic Experts Group)

    • A compression method; JPEG-compressed images are usually stored in the JFIF (JPEG File Interchange Format) file format. JPEG compression is (in most cases) lossy compression. The JPEG/JFIF filename extension is JPG or JPEG. Nearly every digital camera can save images in the JPEG/JFIF format, which supports 8 bits per color (red, green, blue) for a 24-bit total, producing relatively small files. When not too great, the compression does not noticeably detract from the image's quality, but JPEG files suffer generational degradation when repeatedly edited and saved. The JPEG/JFIF format also is used as the image compression algorithm in many PDF files.
  • PNG (Portable Network Graphics)

    • File format was created as the free, open-source successor to the GIF. The PNG file format supports truecolor (16 million colors) while the GIF supports only 256 colors. The PNG file excels when the image has large, uniformly colored areas. The lossless PNG format is best suited for editing pictures, and the lossy formats, like JPG, are best for the final distribution of photographic images, because in this case JPG files are usually smaller than PNG files. The Adam7-interlacing allows an early preview, even when only a small percentage of the image data has been transmitted. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-color, grayscale, and truecolor images are supported, plus an optional alpha channel. PNG is designed to work well in online viewing applications like web browsers so it is fully streamable with a progressive display option. PNG is robust, providing both full file integrity checking and simple detection of common transmission errors. Also, PNG can store gamma and chromaticity data for improved color matching on heterogeneous platforms. Some programs do not handle PNG gamma correctly, which can cause the images to be saved or displayed darker than they should be. Animated formats derived from PNG are MNG and APNG. The latter is supported by Mozilla Firefox and Opera and is backwards compatible with PNG.
  • BMP (Bitmap)

    • handles graphics files within the Microsoft Windows OS. Typically, BMP files are uncompressed, hence they are large; the advantage is their simplicity and wide acceptance in Windows programs.
  • GIF (Graphics Interchange Format)

    • Is limited to an 8-bit palette, or 256 colors. This makes the GIF format suitable for storing graphics with relatively few colors such as simple diagrams, shapes, logos and cartoon style images. The GIF format supports animation and is still widely used to provide image animation effects. It also uses a lossless compression that is more effective when large areas have a single color, and ineffective for detailed images or dithered images.
  • TIFF (or TIF, for the file extension; Tagged Image File Format)

    • A flexible format that normally saves 8 bits or 16 bits per color (red, green, blue) for 24-bit and 48-bit totals, respectively, usually using either the TIFF or TIF filename extension. TIFF's flexibility can be both an advantage and disadvantage, since a reader that reads every type of TIFF file does not exist. TIFFs can be lossy and lossless; some offer relatively good lossless compression for bi-level (black&white) images. Some digital cameras can save in TIFF format, using the LZW compression algorithm for lossless storage. TIFF image format is not widely supported by web browsers. TIFF remains widely accepted as a photograph file standard in the printing business. TIFF can handle device-specific color spaces, such as the CMYK defined by a particular set of printing press inks. OCR (Optical Character Recognition) software packages commonly generate some (often monochromatic) form of TIFF image for scanned text pages.

    Gif To Swf Converter

    Gif To Swf Converter 1.2 program enables users to convert GIF files into .swf and save the required gif frames as required. The program incorporates user-friendly customization features, and exhibits competence in conversion process. Gif To Swf Converter

    Convert the animated GIFs into popular Macromedia's (now Adobe) SWF file format. You can use the produced SWF files as banners for your web site. extract the individual frames out of the animated GIFs. gif to swf conver Feature Summary Convert animated GIF to Flash SWF . Convert to BMP,TIFF,JPEG, PNG image series. Capture a frame to a bmp,jpeg,gif,tiff,png file Frame by frame: This mode runs Gif frame by frame, and is suitable for batch converting. Convert to BMP and TGA images sequence. Customizable frame rate for exported swf file Customizable dimensions for exported swf file Gif To Swf Converter 1.2 application does not requires the users to put in much effort as the program’s feature-set is trouble free to operate. In few simple steps you an easily convert the gif file into swf. Using the ‘Open File’ feature you can load the GIF file into the program. The selected file is displayed at the middle left, and the features are shown at the right of the screen. With the next step you need to select the directory for storing the converted files. You can set the ‘Export Config’ for the output file to posses ½ Original Size, Original Size, 2x original size, 3x Original Size, or select Custom Size, and set the Frame Rate. Making the selection you simply need to hit ‘Convert to Swf’ option and the program would begin with the conversion process. The program supports file exporting features like Export Single, Export BMP sequence and Export Tga Sequence.

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