# histogram() Calculates the histogram of an 8-bit-per-channel, 4-channel interleaved pixel buffer. ``` func histogram() -> vImage.PixelBuffer.Histogram8888 ``` ## Return Value The histogram of the pixel buffer. ## See Also [`func specifyHistogram(vImage.PixelBuffer.Histogram8888, destination: vImage.PixelBuffer)`](/documentation/Accelerate/vImage/PixelBuffer/specifyHistogram(_:destination:)-7xiz4) Performs a histogram specification operation on an 8-bit-per-channel, 4-channel interleaved pixel buffer. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)