@cornerstonejs/core/dist/esm/loaders/decimatedVolumeModifiers/inPlaneDecimationModifier.js

Cornerstone3D Core

export const inPlaneDecimationModifier = {
    name: 'InPlaneDecimationModifier',
    apply(volumeProps, context) {
        const [iDecimation = 1, jDecimation = iDecimation] = context.options.ijkDecimation ?? [];
        const columnFactor = Math.max(1, Math.floor(iDecimation));
        const rowFactor = Math.max(1, Math.floor(jDecimation));
        if (columnFactor === 1 && rowFactor === 1) {
            return volumeProps;
        }
        const [columns, rows] = volumeProps.dimensions;
        const newColumns = Math.max(1, Math.floor(columns / columnFactor));
        const newRows = Math.max(1, Math.floor(rows / rowFactor));
        const newDimensions = [
            newColumns,
            newRows,
            volumeProps.dimensions[2],
        ];
        const newSpacing = [
            volumeProps.spacing[0] * columnFactor,
            volumeProps.spacing[1] * rowFactor,
            volumeProps.spacing[2],
        ];
        const metadata = {
            ...volumeProps.metadata,
            Columns: newColumns,
            Rows: newRows,
            PixelSpacing: [newSpacing[1], newSpacing[0]],
        };
        return {
            ...volumeProps,
            dimensions: newDimensions,
            spacing: newSpacing,
            metadata,
        };
    },
};