Supported File Formats

TwainPRO™ supports the following file formats:

BMP

The Microsoft Windows Bitmap file format is based on the Windows internal bitmap data structures. The BMP format is widely used and it is quick and easy to read.

ePIC

Accusoft's enhanced PIC image format (.PIC). This high performance image compression combines the patented ELS arithmetic coder with the high performance Accusoft JPEG libraries. The result is a new and unbeatable compression technology.

The ePIC compression has significant advantages over standard JPEG. Most importantly it produces smaller file sizes and decompresses extremely quickly. Other features include password encryption, and scaling and cropping without recompression. All Accusoft products support the ePIC file format.

JPEG

The JPEG (Joint Photographic Expert Group) standard is one of the most important image data compression standards. It is widely used in many industries and is becoming the most widely used image format for the Internet.

JPEG Compression is a lossy format that can achieve very high compression ratios. The compression level is adjustable by varying the SaveJPEGChromFactor and SaveJPEGLumFactor properties.

Progressive JPEG is a multiple-scan sequential JPEG format that is becoming popular for its ability to display images in progressively clearer segments.

PDF

Portable Document Format, a file format created by Adobe® System to represent documents independently of the application software, hardware, and operating system used to create them, and independently of the output device on which they are displayed or printed.

PNG

Portable Network Graphics (pronounced "ping") provides a portable, legally unencumbered (royalty-free), well-compressed, well-specified standard for lossless bitmapped image files. The initial motivation for developing PNG was to provide a royalty-free alternative to GIF. The design retains many of the features of GIF that make it an attractive format for transmission of images, such as lossless compression and progressive display capabilities. Additionally, it provides several advantages, including 24-bit image support and generally better compression, although decompression is typically somewhat slower than GIF.

TIFF

TIFF (Tag Image File Format) originally released by Aldus Corporation is a standard file format found in most print, imaging, and desktop publishing programs. TIFF is extremely powerful, flexible, and extensible.

For TIFF, the compression is selected by the SaveTIFFCompression property.