BMP is a standard Windows Image format compatible with DOS and Windows. The BMP format supports RGB, index color, grayscale, and bitmap color modes. You can specify the windows or OS/2 & reg; format and bit depth for the image. You can also specify RLE compression for 4-and 8-bit images in Windows format. BMP images are usually compiled from the bottom up, but you can also select the "flip row order" option to write from the top down. You can also click "Advanced Mode" to select other encoding methods. ("Flip the line Order" and "Advanced Mode" are most useful for game programmers and other people using DirectX .)
GIF is a commonly used file format on the World Wide Web and other online services. It is used to display index color images and images in hypertext markup language (HTML) documents. GIF is a format compressed with LZW to minimize the file size and electronic transmission time. The GIF format retains the transparency in the indexed color image, but does not support the alpha channel.
The joint image Expert Group (JPEG) format is a commonly used format on the World Wide Web and other online services. It is used to display photos and other continuous-tone images in hypertext markup language (HTML) documents. The JPEG format supports CMYK, RGB, and grayscale color modes, but does not support alpha channels. Different from the GIF format, JPEG retains all color information in the RGB image, but compresses the file size by throwing away data selectively.
Automatically decompress the JPEG image when it is enabled. The higher the compression level, the lower the image quality. The lower the compression level, the higher the image quality. In most cases, the results produced by the "best" Quality option are almost identical to those of the original image.
The PCX format is generally used for ibm pc-compatible computers. Most PC software supports version 5th in the PCX format. The version 3rd file uses a standard VGA color palette and does not support custom color palette.
The PCX format supports RGB, index color, grayscale, and bitmap color modes, but does not support alpha channels. PCX supports the RLE compression method. The depth of an image can be 1, 4, 8, or 24.
Portable Document Format (PDF) is a flexible, cross-platform, cross-application file format. Based on the postscript imaging model, the PDF file accurately displays and retains the font, page layout, and vector and bitmap images. In addition, PDF files can contain electronic document search and navigation functions (such as electronic links ).
As an intermediate file format for transferring images between applications, Pict format is widely used in Mac OS graphics and page layout applications. The Pict format supports RGB Images with a single alpha channel and indexed color, grayscale, and bitmap images without Alpha channels. The Pict format is particularly effective when compressing an image that contains a large area of solid color. This compression is amazing for Alpha channels that contain large black and white areas.
When you store RGB Images in PICT format, you can select a 16-bit or 32-bit pixel resolution. For Grayscale Images, you can select 2, 4, or 8 bits per pixel. In Mac OS with QuickTime installed, four available JPEG compression options are available.
Pixar format is designed for high-end graphics applications, such as applications used to render 3D images and animations. Pixar supports RGB and grayscale images with a single alpha channel.
(Mac OS) is a PICT file included in Mac OS file resource derivation? For example, the application startup screen or scrapbook content. The Pict resource format supports RGB Images with a single alpha channel and indexed color, grayscale, and bitmap images without Alpha channels.
You can use the "import" command or "open" command to open PICT resources. When you store a file as a Pict resource, you can specify the resource ID and Resource Name. Like other PICT files, you can also specify the depth and compression options.
The portable network graphics (PNG) format is developed as a patent-free replacement for GIF, and is used for lossless compression and display of images on the World Wide Web. Different from GIF images, PNG supports 24-bit images and generates background transparency without jagged edges. However, some Web browsers do not support PNG images. PNG supports RGB, index color, grayscale, and bitmap images without Alpha channels. PNG retains the transparency in gray and RGB Images.
Raw is a flexible file format used to transmit images between applications and computer platforms. This format supports CMYK, RGB and Grayscale Images with Alpha channels and multi-channel and lab images without Alpha channels.
The raw format consists of a string of bytes that describe the color information in the image. Each pixel is described in binary format. 0 indicates black and 255 indicates white (for images with 16-bit channels, the white value is 65535 ). Adobe Photoshop specifies the number of channels required to describe the image and any other channels in the image. You can specify the file extension (Windows), file type (Mac OS), file creator (Mac OS), and title information.
In Mac OS, the file type is usually a four-character ID used to identify a file-for example, text identifies a file as an ASCII text file. The file creator is also a four-character ID. Most Mac OS applications have unique file creators registered with Apple. Computer developer Services Group ).
Scitex continuous tone (CT) format is used for high-end image processing on scitex computers. Contact scitex to obtain a utility for transferring files stored in scitex CT format to the scitex system. Scitex CT supports CMYK, RGB, and grayscale images, but does not support alpha channels.
The TGA (Targa & reg;) format is specifically used for systems that use truevision & reg; video cards and is generally supported by MS-DOS color applications. The Targa format supports 16-bit RGB Images (5-bit x 3 color channels, plus an unused bit) and 24-bit RGB Images (8-bit x 3 color channels) and 32-bit RGB Images (8-bit x 3 color channels, plus an 8-bit alpha channel ). The Targa format also supports index colors and grayscale images without Alpha channels. When storing RGB Images in this format, you can select the pixel depth and use RLE encoding to compress the image.
The mark image file format (TIFF) is used to exchange files between applications and computer platforms. Tiff is a flexible bitmap image format that is supported by almost all painting, image editing, and page formatting applications. Moreover, almost all desktop scanners can produce tiff images.
The TIFF Format supports CMYK, RGB, lab, index color and Grayscale Images with Alpha channels, and bitmap images without Alpha channels. Photoshop can store layers in TIFF files; however, if you open this file in another application, only the tiled images are visible. Photoshop can also store comments, transparency, and multi-resolution pyramid data in TIFF format.
Types, features, and differences of Image Storage
