During the digitization process the User is able to correct interactively the list of selected segments in order to achieve a maximum of coincidence of the digitized line with channel trace. Also he may currently erase the dirt spots or other unnecessary lines, which prevent to digitizing.
Every User's step may be displayed onto a screen, thus the whole process is performed recursively.
The last stage of the trace digitization is the manual delicate editing of line by means of a mouse (if it is needed).
The digitized line (set of selected black pixel segments) is automatically cleared (optionally) from the screen that is significantly improved the further visual recognizing of the rest complex kind of "spaghetty" traces by the user.
The separate button "Enhancing" is used to rectify canvas from the vertical grid lines, which are frequently present on the datagrams and seriously disarticulate the image.
In order to avoid the "trend" effect while the filtering a special rotate procedure is used. It should be applied once at the beginning of job.
If the paper datagram is produced with the arched pen recorder, it should be previously transformed to the rectangular form with a special means (see below).
A user has a possibility to save current image (partially cleared) into a disk PCX-file at any appropriate moment of the job. This file may be then read and processed by ordinary way as a new one.
Data conversion to CSS format requires resembling and scaling of the digitized pixels coordinates values array in accordance with real data acquisition system, from which the data was received.
This conversion is controlled by the User by means of setting up new sampling rate and scale coefficient.
During resembling the new amplitude values are estimated by means of linear interpolation of two nearest pixel's values. The quality of resembling may be checked visually by drawing new curve along the old trace.
Comparison of the curves before and after resampling
