PixGain

Bitmap based images, such as GIF and PNG images, are based on pixels. A typical screen display operates at around 72 or 96 pixels per inch ( or more than 0.01 inches per pixel). While this is adequate for viewing by eye it is not adequate for maintaining the detail of printed barcodes with a small x dimension – typically also around 0.01 inches per bar.

Barcodes printed with inadequate resolution will either fail to scan or will scan only with difficulty.

To overcome this problem the Barcode IMG Servers can generate the images with a larger number of pixels per inch and then request the browser to scale the images before displaying or printing – hence the presence of the PictureHeight property in the examples above. This scaling factor is the Pixel Gain – or PixGain property.

A PixGain value of 4 – 8 is usually adequate for all but the most demanding images that are destined to be printed.

 

 

 

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Barcode IMG Component Properties