Module: Interactive Overlay Threshold ()

Description:

Binarization transforms a gray level image into a binary selection image. This method is used when the relevant information in the gray level image corresponds to specific gray level interval.

This tool allows thresholds to be selected interactively. The preview is displayed in red over the graylevel data as background.

Click the Apply button to create the binary output selection image in the Data Panel.

Remarks:

• The preview is rendered with 8-bit precision. This implies the rendering can correctly preview the final computation result in the case of 8-bit data, but is approximative with 16/32-bit integer data and float data. Indeed, when the original data precision is higher than 8-bit, data values are sampled when sent to the graphic device. This 8-bit sampling can result in merging near data values during the preview rendering.
• Be aware that the preview thresholding is performed on data values clamped into the data window range. This permits to increase rendering precision inside the range. But this could lead to misinterpretation of the preview on data values out of the data window range. The data window can be set in the Data Properties Panel of the Home Workspace.
• Those preview precision issues do not impact the final computation result.

Connections:

Data [required]
Image data the thresholds are applied to. Supported images are HxUniformScalarField3.

Ports:

Threshold

Specifies the lower and upper values of the threshold interval. Move the slider interactively updates the current red preview which will be applied as result. Default range is the data window (see the Data Properties Panel in the Home Workspace).