@cleerlycode/cornerstone-wado-image-loader
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Cornerstone ImageLoader for DICOM WADO-URI
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<h1 class="page-title">imageLoader/wadouri/unpackBinaryFrame.js</h1>
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<pre class="prettyprint source linenums"><code>/* eslint no-bitwise: 0 */
function isBitSet (byte, bitPos) {
return byte & (1 << bitPos);
}
/**
* Function to deal with unpacking a binary frame
*/
function unpackBinaryFrame (byteArray, frameOffset, pixelsPerFrame) {
// Create a new pixel array given the image size
const pixelData = new Uint8Array(pixelsPerFrame);
for (let i = 0; i < pixelsPerFrame; i++) {
// Compute byte position
const bytePos = Math.floor(i / 8);
// Get the current byte
const byte = byteArray[bytePos + frameOffset];
// Bit position (0-7) within byte
const bitPos = (i % 8);
// Check whether bit at bitpos is set
pixelData[i] = isBitSet(byte, bitPos) ? 1 : 0;
}
return pixelData;
}
export default unpackBinaryFrame;
</code></pre>
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