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Adjust Display Window

Overview

Adjust Display Window

The Adjust Display window lets you fine-tune the contrast of your dataset for each color channel individually.

Warning

A histogram at the bottom shows intensity values for the currently displayed slice, helping you visualize adjustments.

List of widgets

  • Color channel: choose the color channel to adjust.

  • Min slider and edit box (define the black point)
    Min Slider
    Sets the black point; intensities below this are rendered black.

    • on the histogram sets this value; a click on the empty area to the left of the histogram moves the black point below the displayed range.
    • on the slider sets it to 1.
    • Enter values (including negative) directly in the edit box.

  • Min button: assigns the channel's minimal intensity as black.

    • on the button opens a menu to exclude a percentage of low-intensity points.

  • Max slider and edit box (define the white point)
    Max Slider
    Sets the white point; intensities above this are rendered white or pure color.

    • on the histogram sets this value; a click on the empty area to the right of the histogram moves the white point above the displayed range.
    • on the slider sets it to the maximum for the image class.
    • Enter values (including above max) in the edit box.

  • Max button: assigns the channel's maximal intensity as white.

    • on the button opens a menu to define the white point from the histogram.

  • Gamma: adjusts gamma: <1 enhances high intensities, >1 enhances low intensities.

    • on the slider sets it to 1.

Link: links all channels so Min/Max/Gamma changes apply to all simultaneously.

Log: switches histogram between linear and logarithmic scales.

Auto update histogram: enables automatic histogram updates after each slice change.

Update: updates the histogram for the current slice.

Current slice: recalculates intensities for the selected channel on the current slice using specified parameters.

All slices: recalculates intensities for the selected channel across all slices using specified parameters.

Histogram

Max Slider

The histogram plots intensity values (X-axis) against pixel counts (Y-axis) for the image shown in the Image Document — not the full slice.

Warning

  • Adjustments to Gamma are not reflected here
  • Only the shown part of the image

Set Min and Max values for the histogram

  • Manual entry in the edit boxes
  • Slider adjustments
  • (to set the minimum intensity, i.e. the black point) click on the histogram
  • (to set the maximum intensity, i.e. the white point) click on the histogram

Extend the displayed range

The histogram is drawn over the current Min-Max range, so a click inside it can only narrow the range. To extend it, click on the empty area beside the plot, i.e. on the margins where the axes tick labels are:

  • to the left of the histogram lowers the black point
  • to the right of the histogram raises the white point

Each such click shifts the point by at least 10% of the currently displayed range, so the range can be extended step by step with repeated clicks.

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