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# MPSImageAreaMax

A filter that finds the maximum pixel value in a rectangular region centered around each pixel in the source image.

```
class MPSImageAreaMax
```

## Overview

If there are multiple channels in the source image, each channel is processed independently. The [`edgeMode`](/documentation/MetalPerformanceShaders/MPSUnaryImageKernel/edgeMode) property value is assumed to always be [`MPSImageEdgeMode.clamp`](/documentation/MetalPerformanceShaders/MPSImageEdgeMode/clamp) for this filter.

## Topics

### Initializers

[`init(coder:device:)`](/documentation/MetalPerformanceShaders/MPSImageAreaMax/init(coder:device:))

### Methods

[`init(device:kernelWidth:kernelHeight:)`](/documentation/MetalPerformanceShaders/MPSImageAreaMax/init(device:kernelWidth:kernelHeight:))

Initializes the kernel with a specified width and height.

### Properties

[`kernelHeight`](/documentation/MetalPerformanceShaders/MPSImageAreaMax/kernelHeight)

The height of the filter window. Must be an odd number.

[`kernelWidth`](/documentation/MetalPerformanceShaders/MPSImageAreaMax/kernelWidth)

The width of the filter window. Must be an odd number.


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