Hi,

I tested your request, opened the tiff image in Qgis and I get this (I presume this image looks like what you expected) :

For the EVI-RAINBOW layer, I used this evalscript:

//VERSION=3

let viz = ColorGradientVisualizer.createBlueRed();

function evaluatePixel(samples) {
    let val = 2.5 * (samples.B08 - samples.B04) / (samples.B08 + 6 * samples.B04 - 7.5 * samples.B02 + 1);
    val = viz.process(val);
    val.push(samples.dataMask);
    return val;
}

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

I hope it helps,

Best,

thanks for the answer, that is the color I want to achieve.
Howewer, I have no idea how can I achieve this from c#.
Is there any way to get an image directly in rainbow color?

I am sorry I know nothing about c#. I can’t help there

But if you want to use the same request you sent above to get the tiff images in rainbow colors, you will first need to create EVI-RAINBOW layer in your configuration.

Here is how you can create it. https://www.sentinel-hub.com/develop/dashboard/

I am sorry if I didn’t understand your question well.

Just let me know if you still need help.

Best
 

thanks a lot, I didn’t know about develop/dashboard part, I took over the project from my colleagues who obviously did it.

When I logged in there I found the following info:

Scripts and products converted to V3.
All V1 and V2 evalscripts have been automatically converted to V3 on November 2, 2020.

That is actually a date I started receiving grayscale pictures.
I’ll try to fix it according to your script, so if I there is a problem, I will write to you.

Thanks!

All the best !

Let us know if you get stuck