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How to use quantizeAndInverse method in wpt

Best JavaScript code snippet using wpt

node-jpg.js

Source:node-jpg.js

...148        k++;149      }150      return zz;151    }152    function quantizeAndInverse(zz, qt) {153      var R = new Int32Array([154        zz[0]  * qt[0],  zz[1]  * qt[1],  zz[5]  * qt[5],  zz[6]  * qt[6],  zz[14] * qt[14], zz[15] * qt[15], zz[27] * qt[27], zz[28] * qt[28],155        zz[2]  * qt[2],  zz[4]  * qt[4],  zz[7]  * qt[7],  zz[13] * qt[13], zz[16] * qt[16], zz[26] * qt[26], zz[29] * qt[29], zz[42] * qt[42],156        zz[3]  * qt[3],  zz[8]  * qt[8],  zz[12] * qt[12], zz[17] * qt[17], zz[25] * qt[25], zz[30] * qt[30], zz[41] * qt[41], zz[43] * qt[43],157        zz[9]  * qt[9],  zz[11] * qt[11], zz[18] * qt[18], zz[24] * qt[24], zz[31] * qt[31], zz[40] * qt[40], zz[44] * qt[44], zz[53] * qt[53],158        zz[10] * qt[10], zz[19] * qt[19], zz[23] * qt[23], zz[32] * qt[32], zz[39] * qt[39], zz[45] * qt[45], zz[52] * qt[52], zz[54] * qt[54],159        zz[20] * qt[20], zz[22] * qt[22], zz[33] * qt[33], zz[38] * qt[38], zz[46] * qt[46], zz[51] * qt[51], zz[55] * qt[55], zz[60] * qt[60],160        zz[21] * qt[21], zz[34] * qt[34], zz[37] * qt[37], zz[47] * qt[47], zz[50] * qt[50], zz[56] * qt[56], zz[59] * qt[59], zz[61] * qt[61],161        zz[35] * qt[35], zz[36] * qt[36], zz[48] * qt[48], zz[49] * qt[49], zz[57] * qt[57], zz[58] * qt[58], zz[62] * qt[62], zz[63] * qt[63]]);162      var i, j, y, x, u, v;163164      var r = new Uint8Array(64), ri;165      for (i = 0; i < 64; i++) {166        var sum = 0;167        var table = iDCTTables[i];168        for (j = 0; j < 64; j++)169          sum += table[j] * R[j];170        // TODO loosing precision?171        var sample = 128 + ((sum / 4) >> (precision - 8));172        // clamping173        r[i] = sample < 0 ? 0 : sample > 0xFF ? 0xFF : sample;174      }175      return r;176    }177    function storeMcu(component, r, mcu, row, col) {178      var mcuRow = (mcu / component.mcusPerLine) | 0;179      var mcuCol = mcu % component.mcusPerLine;180      var blockRow = mcuRow * component.v + row;181      var blockCol = mcuCol * component.h + col;182183      var scanLine = blockRow << 3, sample = blockCol << 3;184      var lines = component.lines;185      while (scanLine + 8 > lines.length) {186        lines.push(new Uint8Array(component.blocksPerLine << 3));187      }188189      var i, j, offset = 0;190      for (j = 0; j < 8; j++) {191        var line = lines[scanLine + j];192        for (i = 0; i < 8; i++)193          line[sample + i] = r[offset++];194      }195    }196    function storeBlock(component, r, mcu) {197      var blockRow = (mcu / component.mcusPerLine) | 0;198      var blockCol = mcu % component.mcusPerLine;199200      var scanLine = blockRow << 3, sample = blockCol << 3;201      var lines = component.lines;202      while (scanLine + 8 > lines.length) {203        lines.push(new Uint8Array(component.blocksPerLine << 3));204      }205206      var i, j, offset = 0;207      for (j = 0; j < 8; j++) {208        var line = lines[scanLine + j];209        for (i = 0; i < 8; i++)210          line[sample + i] = r[offset++];211      }212    }213214    var componentsLength = components.length;215    var component, i, j, k, n;216    if (progressive) {217      throw "not implemented: progressive";218    } else {219      for (i = 0; i < componentsLength; i++) {220        component = components[i];221        component.blocksPerLine = (samplesPerLine * component.h / maxH + 7) >> 3;222        component.mcusPerLine = ((component.blocksPerLine + component.h - 1) / component.h) | 0;223        component.decode = decodeBaseline;224      }225    }226227    var mcu = 0, marker;228    var mcuExpected =229      (0|((((samplesPerLine + 7) >> 3) + maxH - 1) / maxH)) *230      (0|((((scanLines + 7) >> 3) + maxV - 1) / maxV));231    if (!resetInterval) resetInterval = mcuExpected;232233    var zz, r;234    while (mcu < mcuExpected) {235      if (componentsLength == 1) {236        component = components[0];237        for (n = 0; n < resetInterval; n++) {238          zz = component.decode(component);239          r = quantizeAndInverse(zz, component.quantizationTable);240          storeBlock(component, r, mcu);241          mcu++;242        }243      } else {244        for (n = 0; n < resetInterval; n++) {245          for (i = 0; i < componentsLength; i++) {246            component = components[i];247            var h = component.h, v = component.v;248            for (j = 0; j < v; j++) {249              for (k = 0; k < h; k++) {250                zz = component.decode(component);251                r = quantizeAndInverse(zz, component.quantizationTable);252                storeMcu(component, r, mcu, j, k);253              }254            }255          }256          mcu++;257        }258      }259260      // find marker261      bitsCount = 0;262      marker = (data[offset] << 8) | data[offset + 1];263      if (marker <= 0xFF00) {264        throw "marker was not found";265      }
...

jpegQuantizeAndInverse.ts

Source:jpegQuantizeAndInverse.ts

...3//   Christoph Loeffler, Adriaan Ligtenberg, George S. Moschytz,4//   "Practical Fast 1-D DCT Algorithms with 11 Multiplications",5//   IEEE Intl. Conf. on Acoustics, Speech & Signal Processing, 1989,6//   988-991.7export function quantizeAndInverse(component: any, zz: any, dataOut: any, dataIn: any) {8  var qt = component.quantizationTable;9  var v0, v1, v2, v3, v4, v5, v6, v7, t;10  var p = dataIn;11  var i;12  // dequant13  for (i = 0; i < 64; i++) p[i] = zz[i] * qt[i];14  // inverse DCT on rows15  for (i = 0; i < 8; ++i) {16    var row = 8 * i;17    // check for all-zero AC coefficients18    if (19      p[1 + row] == 0 &&20      p[2 + row] == 0 &&21      p[3 + row] == 0 &&...

jpegComponentDataBuilder.ts

Source:jpegComponentDataBuilder.ts

...21    for (var blockRow = 0; blockRow < blocksPerColumn; blockRow++) {22      var scanLine = blockRow << 3;23      for (i = 0; i < 8; i++) lines.push(new Uint8Array(samplesPerLine));24      for (var blockCol = 0; blockCol < blocksPerLine; blockCol++) {25        quantizeAndInverse(component, component.blocks[blockRow][blockCol], r, R);26        var offset = 0,27          sample = blockCol << 3;28        for (j = 0; j < 8; j++) {29          var line = lines[scanLine + j];30          for (i = 0; i < 8; i++) line[sample + i] = r[offset++];31        }32      }33    }34    return lines;35  }...

Using AI Code Generation

1const wptools = require('wptools');2const fs = require('fs');3const path = require('path');4const { exec } = require('child_process');5const { promisify } = require('util');6const execAsync = promisify(exec);7const { quantizeAndInverse } = require('wptools');8const image = path.join(__dirname, 'test.png');9const quantizeAndInverse = async (image) => {10    const { stdout, stderr } = await execAsync(`convert ${image} -colors 16 -depth 4 -quantize gray -depth 8 -negate -normalize -brightness-contrast 10x10 ${image}`);11    if (stderr) {12        console.error(stderr);13    }14    return stdout;15};16quantizeAndInverse(image)17.then((result) => console.log(result))18.catch((err) => console.error(err));19const wptools = require('wptools');20const fs = require('fs');21const path = require('path');22const { exec } = require('child_process');23const { promisify } = require('util');24const execAsync = promisify(exec);25const { quantizeAndInverse } = require('wptools');26const image = path.join(__dirname, 'test.png');27const quantizeAndInverse = async (image) => {28    const { stdout, stderr } = await execAsync(`convert ${image} -colors 16 -depth 4 -quantize gray -depth 8 -negate -normalize -brightness-contrast 10x10 ${image}`);29    if (stderr) {30        console.error(stderr);31    }32    return stdout;33};34quantizeAndInverse(image)35.then((result) => console.log(result))36.catch((err) => console.error(err));37const wptools = require('wptools');38const fs = require('fs');39const path = require('path');40const { exec } = require('child_process');41const { promisify } = require('util');42const execAsync = promisify(exec);43const { quantizeAndInverse } = require('wptools');44const image = path.join(__dirname, 'test.png');45const quantizeAndInverse = async (image) => {46    const { stdout

Using AI Code Generation

1const wptoolkit = require('wptoolkit');2const fs = require('fs');3const path = require('path');4const data = JSON.parse(fs.readFileSync(path.join(__dirname, 'data.json'), 'utf-8'));5const quantized = wptoolkit.quantizeAndInverse(data, 1);6console.log(quantized);

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var path = require('path');4var img = fs.readFileSync(path.join(__dirname, 'test.png'));5var quantizeAndInverse = wptools.quantizeAndInverse;6var quantized = quantizeAndInverse(img, 2);7console.log(quantized);8### quantizeAndInverse(image, colors)9MIT © [André Cruz](

Using AI Code Generation

1var wptools = require('wptools');2var fs = require('fs');3var path = require('path');4var dir = path.join(__dirname, 'images');5var files = fs.readdirSync(dir);6var i = 0;7var img = files[i];8var imgPath = path.join(dir, img);9var w = new wptools(imgPath);10w.quantizeAndInverse()11  .then(function(result) {12    console.log(result);13  })14  .catch(function(err) {15    console.log(err);16  });

Using AI Code Generation

1var quantize = require('wpt-quantize');2var data = [1,2,3,4,5,6,7,8,9,10];3var quantized_data = quantize.quantize(data, 3);4console.log(quantized_data);5var inverse_quantized_data = quantize.quantizeAndInverse(quantized_data, 3);6console.log(inverse_quantized_data);7MIT © [Ankit Saxena](

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