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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | 34x 34x 34x 34x | import { getWebWorkerManager } from '@cornerstonejs/core';
const workerManager = getWebWorkerManager();
const WorkerOptions = {
maxWorkerInstances: 1,
autoTerminateOnIdle: {
enabled: true,
idleTimeThreshold: 1000,
},
};
// Register the task
const workerFn = () => {
return new Worker(new URL('./histogramWorker.js', import.meta.url), {
name: 'histogram-worker', // name used by the browser to name the worker
});
};
const getViewportVolumeHistogram = async (viewport, volume, options?) => {
workerManager.registerWorker('histogram-worker', workerFn, WorkerOptions);
const volumeImageData = viewport.getImageData(volume.volumeId);
Iif (!volumeImageData) {
return undefined;
}
let scalarData = volume.scalarData;
if (volume.numTimePoints > 1) {
const targetTimePoint = volume.numTimePoints - 1; // or any other time point you need
scalarData = volume.voxelManager.getTimePointScalarData(targetTimePoint);
} else {
scalarData = volume.voxelManager.getCompleteScalarDataArray();
}
Iif (!scalarData?.length) {
return undefined;
}
const { dimensions, origin, direction, spacing } = volume;
const range = await workerManager.executeTask('histogram-worker', 'getRange', {
dimensions,
origin,
direction,
spacing,
scalarData,
});
const { minimum: min, maximum: max } = range;
Iif (min === Infinity || max === -Infinity) {
return undefined;
}
const calcHistOptions = {
numBins: 256,
min: Math.max(min, options?.min ?? min),
max: Math.min(max, options?.max ?? max),
};
const histogram = await workerManager.executeTask('histogram-worker', 'calcHistogram', {
data: scalarData,
options: calcHistOptions,
});
return histogram;
};
export { getViewportVolumeHistogram };
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