---
title: "vImageHistogramCalculation_PlanarF(_:_:_:_:_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/vimagehistogramcalculation_planarf(_:_:_:_:_:_:)"
---

# vImageHistogramCalculation_PlanarF(_:_:_:_:_:_:)

Calculates the histogram of a 32-bit planar buffer.

## Declaration

```swift
func vImageHistogramCalculation_PlanarF(_ src: UnsafePointer<vImage_Buffer>, _ histogram: UnsafeMutablePointer<vImagePixelCount>, _ histogram_entries: UInt32, _ minVal: Pixel_F, _ maxVal: Pixel_F, _ flags: vImage_Flags) -> vImage_Error
```

## Parameters

- `src`: The source vImage buffer.
- `histogram`: The collection that contains histogram_entries elements that receives the histogram data.
- `histogram_entries`: The number of histogram entries.
- `minVal`: The minimum pixel value. The operation assigns pixel values less than minVal to the first histogram entry.
- `maxVal`: The maximum pixel value. The operation assigns pixel values greater than maxVal to the last histogram entry.
- `flags`: The options to use when performing the operation. If your code implements its own tiling or its own multithreading, pass doc://com.apple.accelerate/documentation/Accelerate/kvImageDoNotTile; otherwise, pass doc://com.apple.accelerate/documentation/Accelerate/kvImageNoFlags.

## Return Value

Return Value kvImageNoError; otherwise, one of the error codes in Data Types and Constants.

## Discussion

Discussion The following code populates the histogram array with the histogram of the specified vImage_Buffer structure. let entryCount = 64 var histogram = [vImagePixelCount](repeating: 0, count: entryCount)

// `buffer` is a `vImage_Buffer` structure. _ = vImageHistogramCalculation_PlanarF(&buffer,                                        &histogram,                                        UInt32(entryCount),                                        0, 1,                                        vImage_Flags(kvImageNoFlags))

## See Also

### Related Documentation

- [Enhancing image contrast with histogram manipulation](accelerate/enhancing-image-contrast-with-histogram-manipulation.md)
- [Specifying histograms with vImage](accelerate/specifying-histograms-with-vimage.md)

### Calculating a histogram

- [vImageHistogramCalculation_Planar8(_:_:_:)](accelerate/vimagehistogramcalculation_planar8(_:_:_:).md)
- [vImageHistogramCalculation_ARGB8888(_:_:_:)](accelerate/vimagehistogramcalculation_argb8888(_:_:_:).md)
- [vImageHistogramCalculation_ARGBFFFF(_:_:_:_:_:_:)](accelerate/vimagehistogramcalculation_argbffff(_:_:_:_:_:_:).md)