As with other visual encoding schemes, the density of DataGlyph encoding is determined by four factors: The two-dimensional bar codes, such as PDF, do much better.
The data compression used. In high-density encoding, where the print and scan defects are likely to be large compared to the encoding feature size, more of the encoding features will be lost or misread as a result of such degradation. Even when individual glyphs are large enough to be resolved by the human eye, in groups they form a pleasing pattern that is not distracting.
But there must always be some in any real-world application of any encoding scheme. When text is encoded, it can be compressed by factors of two or more by means of character encoding or other compression techniques. As with other visual encoding schemes, the density of DataGlyph encoding is determined by four factors: But the entire speech can easily be represented in less than bytes.
And redundant coding consumes extra space, reducing the effective data density. The two-dimensional bar codes, such as PDF, do much better. In high-density encoding, where the print and scan defects are likely to be large compared to the encoding feature size, more of the encoding features will be lost or misread as a result of such degradation.
The two-dimensional bar codes, such as PDF, do much better. DataGlyphs offer a data density nearly twice that of PDF, one of the most popular forms of 2d barcodes. As a countermeasure, some system of redundancy must be used to keep the failure rate within reasonable bounds - that is, for error correction.
As a countermeasure, some system of redundancy must be used to keep the failure rate within reasonable bounds - that is, for error correction. When text is encoded, it can be compressed by factors of two or more by means of character encoding or other compression techniques.
Posted by: Kilar | on October 2, 2012
But the entire speech can easily be represented in less than bytes. As a countermeasure, some system of redundancy must be used to keep the failure rate within reasonable bounds - that is, for error correction.
DataGlyphs for faxing are often drawn disproportionately large for added reliability in the face of the "noise" that frequently affects fax images. The glyphs are laid down in groups on a regular, finely spaced grid forming unobtrusive, evenly textured gray areas.
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Samurisar says: The fixed overhead of the synchronization frame and header.
Voodoolkree says: As with other visual encoding schemes, the density of DataGlyph encoding is determined by four factors:
Magul says: The process of printing and scanning unavoidably degrades image-encoded data. The data compression used.
Dojora says: Again, how much error correction must be employed will vary from application to application. At that density, and with minimal height, Code 39 the most commonly used generalpurpose linear bar code can only achieve a density of about 25 binary bytes per square inch.
Tojakinos says: The fixed overhead of the synchronization frame and header. The data compression used.