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# tiffRepresentationOfImageReps(in:using:factor:)

Returns a TIFF representation of the specified images using the specified compression scheme and factor.

```
class func tiffRepresentationOfImageReps(in array: [NSImageRep], using comp: NSBitmapImageRep.TIFFCompression, factor: Float) -> Data?
```

## Parameters

`array`

An array containing objects representing bitmap image representations.

`comp`

An enum constant that represents a TIFF data-compression scheme. Legal values for `compression` can be found in [`NSBitmapImageRep.TIFFCompression`](/documentation/AppKit/NSBitmapImageRep/TIFFCompression).

`factor`

A `float` value that provides a hint for those compression types that implement variable compression ratios.

    Currently only JPEG compression uses a compression factor. JPEG compression in TIFF files is not supported, and     `factor`     is ignored.

## Return Value

A data object containing a TIFF image representation.

## Discussion

If the specified compression isn’t applicable, no compression is used. If a problem is encountered during generation of the TIFF, the method raises an [`NSTIFFException`](/documentation/AppKit/NSTIFFException) or an [`NSBadBitmapParametersException`](/documentation/AppKit/NSBadBitmapParametersException).

---

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