---
title: "init(min:zero:full:max:)"
framework: accelerate
role: symbol
role_heading: Initializer
path: "accelerate/vimagechanneldescription/init(min:zero:full:max:)"
---

# init(min:zero:full:max:)

Returns a structure that describes the range and clamp limits for a pixel format.

## Declaration

```swift
init(min: CGFloat, zero: CGFloat, full: CGFloat, max: CGFloat)
```

## Parameters

- `min`: The minimum encoded value.
- `zero`: The encoding for the value 0.0.
- `full`: The encoding for 1.0 (0.5 for chrominance).
- `max`: The maximum encoded value.

## Return Value

Return Value A structure that describes the range and clamp limits for a pixel format.

## See Also

### Creating a channel description

- [init()](accelerate/vimagechanneldescription/init().md)