User manual SONY PEG-NZ90 BITMAP IMAGE FFS

[. . . ] However, the content of this document is provided "as is", without warranties of any kind with regard to its accuracy or reliability, and specifically excluding all implied warranties, for example of merchantability, fitness for purpose, title and non-infringement. In no event shall Picsel be liable for any special, indirect or consequential damages whatsoever resulting from loss of use, data or profits, arising out of or in connection with the use of this document. Picsel reserves the right to revise the document or withdraw it at any time without prior notice. [. . . ] The formats interpreted by ePAGE are richly expressive, containing not just text but sophisticated layout and rendering features, rich fonts, colour, images, tables, graphics and many other document features. Picsel is continuously developing its file format support to eventually cover every feature of the native file. With such a wealth of features across many document types, this is inevitably an ongoing process, with milestone releases of new functionality planned at periodic intervals. The approach involves researching the feature set most commonly found in real documents, building support early for the most frequently used elements, and ensuring these features are reproduced with total faithfulness to the original. The emphasis of ePAGE is on displaying rich content rather than on reproducing the document creation facilities of the original application. This document describes the features supported in ePAGE. This level of support already covers the vast majority of characteristics that occur in day to day documents of this type, and the specific features are described with notes where appropriate. Those features planned for future implementation are also described, for completeness. Bitmap Images A bitmap image is a picture made up of a grid of pixels (dots), as compared to a vector path which is made up of lines between coordinates. There are a number of file formats popular for storing bitmap images, each with benefits and drawbacks to consider. The main image formats supported by ePAGE are JPEG, GIF, PNG and BMP. Many document formats, such as HTML and Word, allow bitmap images to be included in various other formats, and do not directly define them. This is convenient as it allows specialists (such as the Joint Photographic Experts Group) in image compression and other areas to define the image formats separately from the document formats, although the extra network delay of requesting a separate file may become an issue. Picsel Image File Format Support Page 5 JPEG JPEG is a format defined by the ISO Joint Photographic Experts Group. It is well suited to efficient compression of photographs, which it does by deleting unimportant content according to the kind of detail that people notice; in particular, it removes more chrominance (colour) information than luminance (brightness), since the human eye is more sensitive to luminance. Although JPEG is less well suited to cartoon or diagram images, ePAGE will of course render the image data optimally. [. . . ] MNG multi-frame animation Gamma colour correction Picsel Image File Format Support Page 8 BMP Windows Bitmap (BMP) is a format used by MS Windows and other programs which value simplicity over economy. BMP files are almost always uncompressed and so very large. BMP can include 1, 4, 8 or 24 bits per pixel, allowing both indexed and full colour. [. . . ]