Landsat 8 Pansharpened True Color

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//VERSION=3
let minVal = 0.0;
let maxVal = 0.4;

let viz = new DefaultVisualizer(minVal, maxVal);

function evaluatePixel(samples) {
    let sudoPanW = (samples.B04 + samples.B03 + samples.B02 * 0.4) / 2.4;
    let ratioW = samples.B08 / sudoPanW;
    let val = [samples.B04 * ratioW, samples.B03 * ratioW, samples.B02 * ratioW];
    val = viz.processList(val);
    val.push(samples.dataMask);
    return val;
}

function setup() {
  return {
    input: [{
      bands: [
        "B02",
        "B03",
        "B04",
        "B08",
        "dataMask"
      ]
    }],
    output: {
      bands: 4
    }
  }
}

Evaluate and visualize

• EO Browser

Description

The true color product maps Landsat 8 band values B04, B03, and B02, which roughly correspond to red, green, and blue part of the electromagnetic spectrum, respectively, to R, G, and B components. The RGB bands with spectral resolution of 30 meters were pansharpened using the PAN band with spectral resolution of 15 meters. The result is a true color image with the resolution of 15 meters. The script can only be used with Landsat 8 Level 1, as Level 2 collection does not have a panchromatic band.

Description of representative images

Pansharpened true color image of Rome. Acquired on 2020-07-30, processed by Sentinel Hub.

References

• Landsat 8 bands
• Mapbox. Pansharpening for higher resolution in Landsat-live. Medium.