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Handy Image Processing Tools

The processing tools pane offers a substantial range of image transformation methods.

The operation principle is that the user selects a particular method by the sub-tab, configures the parameters in the pane, and then activates the Run button. In case the Replace box is checked, the original data will be overwritten, otherwise a new series is created and added to the list.

Note the Button Save button which allows selecting a data format using the arrow down button, and save the image data of the current tab. This save button is missing in the PVIEW tool because the images can be saved using the standard saving button of the tool.

Filter

The following image filters are available:

  • Gaussian smoothing 3D filter with a full-width at half maximum (FWHM) in mm
  • Median smoothing 3D filter with a width in mm
  • Canny Deriche 2D edge enhancing filter.

Average

Tool Scale

There are two variants available:

  • Averaging of a range of Frames of a dynamic series.
  • Averaging of a contiguous range of Slices.

Scale

Tool Scaling

There are two variants for scaling the pixel values and adding an offset:

  • * to multiply with a constant.
  • / to divide by a constant.

Replace

Tool Replace

This function is for replacing pixel values which satisfy a certain condition by a constant. The available criteria are <, =, >.

Reduce

Tool Reduce

Simple function for reducing the number of pixels by a factor of 2, 4, or 8 in each direction. If the number of pixels is not divisible without remainder by the selected reduction factor, a warning indication is shown indicating that a part of the image will be missing after the operation.

This function is intended for cases with matrix sizes of the power of 2. In other cases please use the Interpolation function of the External tools.