Manually digitize

You can use point capture mode (Operations=>Point capture mode) for manual digitizing. In this mode data points can be also moved; to move a point first select it with right mouse button, and then set it at a new location by left button. Data points can be also set by

double clicking left mouse button in Magnifier window, or Shift + clicking in main window or in Magnifier window. To remove points it is convenient to use eraser tool (Operations=>Data points eraser).

Reorder points

When using algorithms for automatic digitizing, it is a common situation that points appear to be in the wrong order. They can be reordered with the help of Reorder tool (Operations=>Reorder tool). Hold left mouse button, and move mouse starting from the first point. Only current line is reordered. Reordering can be started from the middle of the line if one holds Ctrl down.

Hints

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To change eraser size hold down Shift and left mouse button and move mouse (up to increase eraser size, down to decrease it). Reorder tool can be resized in the same way.

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After clicking "Auto trace lines" button (or alternatively, 'Operations=>Auto trace lines' menu), you are prompted to choose starting point. Click left mouse button to trace lines in all directions, and right mouse button to choose direction for auto trace. In the latter case click left and right mouse buttons to set area boundaries.

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Press TAB to move mouse cursor to the center of Magnifier window and back.

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When you set points in main window, they are aligned to image pixels. Magnifier window allows to set points more accurately. One can set points in Magnifier window by double clicking left mouse button, or by using context menu (a pop up menu, which appears when you release right mouse button). Hold Ctrl to make points in Magnifier window be aligned to image pixels as in the main window.

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In the Point capture mode hold down Ctrl for more accurate cursor positioning.

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In the Point capture mode data points can be moved; to move a point first select it with right mouse button, and then set it at a new location by left button.

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In the "Digitize area" mode ('Operations=>Digitize area') you can rotate rectangular grid by holding Shift while moving mouse. Hold Ctrl to move the grid.

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In the reorder tool mode ('Operations=>Reorder tool') hold down Ctrl to skip some data points and continue reordering from the middle of the line.

DigitizeIt Help

Quick Start:

1. Scan your graph and save it in a supported image format (e.g. gif, tiff, png, bmp...), or copy it into the clipboard.

2. Load the graph into DigitizeIt: File->Open or paste a graph via the clipboard (Edit->Paste Graph). You can also take a screenshot (Edit->Capture Screenshot).
Tip: scan your graph at a reasonable resolution, 1000 x 1000 pixels is usually enough

3. Zoom the graph to your liking with View->Zoom in

4. Put the axes:
a) select Axis->X min
b) now click on the lower value of the x-axis
c) enter corresponding x-axis value
repeat this for X max, Y min, Y max

5. Select linear, logarithmic or reciprocal scaling: Axis->x Scale->logarithmic

6. Now you are ready to go, after Data->Take points start selecting points by clicking on the screen.
You can also let DigitizeIt automatically digitize line or scatter plots for you. Select Auto->Find Line or Auto->Find Symbol and click on the desired line or one of the symbols, see also line digitizing and symbol digitizing.

7. Choose, if you want the data sorted Data Set->Sort

8. The rest should be self-explanatory, when you are done save the data in ASCII-format with File->Export ASCII or copy the data to the clipboard (Edit->Copy to Clipboard). Now the data can be pasted or loaded in many other applications.

Дата добавления: 2015-10-31