ABBYY products are often licensed with a system that allows to process a certain number of pages within a period of time. A 'page' in this terminology isa a DIN A4 pages (210 x 297 mm).
Following rules apply:
If the page that was processed is smaller than A4, then one A4 page is counted
If the page that was processed is bigger than A4 (for example A3) the page counter gets reduced as follows:
A3 = 2 x A4
A2 = 2 x A3 = 4 x A4 - so minimum 4 pages will be counted
In reality, the situation is more complicated, because the physical paper size is a standard size, however the size of the digital image depends on the scan/image resolution.
This means that at the end, the important value is the the number of pixels of an image.
Page Count and Paper Size
For pages larger than A4 the counter of recognized pages increases by the number
(area of the page)/(area of A4) )
To calculate the width and height of a page we use the following formula:
int imageWidth = image→GetWidth() / max( 1, image→GetResolution() )
int imageHeight = image→GetHeight() / max( 1, image→GetResolution() ); [image is an Image Object].
This object represents a single “image plane” (black-and-white, color or preview) of an image in internal format.
imageWidth and imageHeight are values in inches.
If you need the size in centimeters you just need to know 1 inch = 2,54 cm.
Format & Pixel
|Paper size||in inch||in mm||in twips (1/1440 of inch)|
|A3||11,69 x 16,54||297 x 420||16838 x 23811|
|A4||8,27 x 11,69||210 x 297||11909 x 16834|
|A5||5,83 x 8,27||148 x 210||8391 x 11909|
|Legal||8,5 x 14||216 x 356||12240 x 20160|
|Letter||8,5 x 11||216 x 279||12240 x 15840|
|Executive||7,25 x 10,5||184 x 266||10440 x 15120|