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// Keeping the ruler settings to reset in the end of the script
var startRulerUnits = app.preferences.rulerUnits;
var startTypeUnits = app.preferences.typeUnits;
var startDisplayDialogs = app.displayDialogs;

// Changing ruler settings to pixels for correct image resizing
app.preferences.rulerUnits = Units.PIXELS;
app.preferences.typeUnits = TypeUnits.PIXELS;
app.displayDialogs = DialogModes.NO;

// Reset the ruler
app.preferences.rulerUnits = startRulerUnits;
app.preferences.typeUnits = startTypeUnits;
app.displayDialogs = startDisplayDialogs;