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# LUT1D

The LUT1D element specifies a 1D LUT to apply.

## Contains

In order:

- Description. Optional, any number.
- Array (LUT1D). Required, one only.

NoteThe IndexMap element is not supported. The most efficient way to achieve the same result is to precede the operator with another LUT1D element, or to combine both LUTs into a single one.

## Contained By

- ProcessList

## Attributes

id, name, inBitDepth, outBitDepth
  See Common Operator Attributes.
interpolation
  Optional. The only currently supported value is "linear".
halfDomain
  Optional. If this attribute is present, its value must be "true". In this case, the input domain is all possible 16-bit floating-point values, and there must be exactly 65536 entries in the Array element. For example, the unsigned integer 15360 has the same bit-pattern (0011110000000000) as the half-float value 1.0, so the 15360th entry (zero-indexed) in the Array element is the output value corresponding to an input value of 1.0.
rawHalfs
  Optional. If this attribute is present, its value must be "true". In this case, the values in the array should be 16-bit floating point values expressed as unsigned 16-bit integers representing the equivalent bit pattern. For example, to represent the value 1.0, you would enter the integer 15360 in the Array element because it has the same bit-pattern. This allows you to specify the exact half-float values you want without relying on conversion from decimal text strings.

## Example

### 1D LUT

    <ProcessList id="8a52d5fb-a903-4805-8bae-24f7553bfb70" version="1.2">
        <LUT1D inBitDepth="10i" outBitDepth="32f">
            <Array dim="1024 1">
    -0.014279292
    -0.014160193
    -0.014040368
    <!-- 1021 lines omitted -->

            </Array>
        </LUT1D>
    </ProcessList>

### 3×1D LUT

    <ProcessList id="a76dbe2e-e610-49a6-8c3b-5962375a8b4a" version="1.2">
        <LUT1D inBitDepth="16i" outBitDepth="32f">
            <Array dim="2 3">
     -0.092903227  -0.092903227  -0.092903227
     11.798709869  11.798709869  11.798709869
            </Array>
        </LUT1D>
     </ProcessList>

#### Topics in this section

- Array (LUT1D)

  The Array element specifies an array of values for a LUT or matrix. When it is contained by a LUT1D element, the format of its contents is different than when it is contained by LUT3D or Matrix elements.