---
title: sobelGradients()
framework: coreimage
role: symbol
role_heading: Type Method
path: coreimage/cifilter-swift.class/sobelgradients()
---

# sobelGradients()

Calculates the Sobel gradients for an image.

## Declaration

```swift
class func sobelGradients() -> any CIFilter & CISobelGradients
```

## Return Value

Return Value A CIImage containing the Sobel gradients.

## Discussion

Discussion This filter applies the Sobel operator to the color components of the input image. You would typically use the Sobel filter as part of an edge-detection algorithm for performing. The following code applies the sobelGradients() filter to an image. func sobelGradients(inputImage: CIImage) -> CIImage {     let sobel = CIFilter.sobelGradients()     sobel.inputImage = inputImage     return sobel.outputImage! }

## See Also

### Filters

- [blendWithAlphaMask()](coreimage/cifilter-swift.class/blendwithalphamask().md)
- [blendWithBlueMask()](coreimage/cifilter-swift.class/blendwithbluemask().md)
- [blendWithMask()](coreimage/cifilter-swift.class/blendwithmask().md)
- [blendWithRedMask()](coreimage/cifilter-swift.class/blendwithredmask().md)
- [bloom()](coreimage/cifilter-swift.class/bloom().md)
- [cannyEdgeDetector()](coreimage/cifilter-swift.class/cannyedgedetector().md)
- [comicEffect()](coreimage/cifilter-swift.class/comiceffect().md)
- [coreMLModel()](coreimage/cifilter-swift.class/coremlmodel().md)
- [crystallize()](coreimage/cifilter-swift.class/crystallize().md)
- [depthOfField()](coreimage/cifilter-swift.class/depthoffield().md)
- [edges()](coreimage/cifilter-swift.class/edges().md)
- [edgeWork()](coreimage/cifilter-swift.class/edgework().md)
- [gaborGradients()](coreimage/cifilter-swift.class/gaborgradients().md)
- [gloom()](coreimage/cifilter-swift.class/gloom().md)
- [heightFieldFromMask()](coreimage/cifilter-swift.class/heightfieldfrommask().md)