# How do I Desaturate or greyscale WITHOUT using a filter

**URL:** https://forum.kirupa.com/t/how-do-i-desaturate-or-greyscale-without-using-a-filter/323311
**Category:** flash
**Created:** [June 24, 2011, 6:51pm UTC](https://forum.kirupa.com/t/how-do-i-desaturate-or-greyscale-without-using-a-filter/323311 "2011-06-24T18:51:58Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Mystify](https://avatars.discourse-cdn.com/v4/letter/m/ea5d25/32.png) [@Mystify](https://forum.kirupa.com/u/Mystify)
#### Post date: [June 24, 2011, 6:51pm UTC](https://forum.kirupa.com/t/how-do-i-desaturate-or-greyscale-without-using-a-filter/323311/1 "2011-06-24T18:51:58Z")

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I am developing an application for iPhone retina display and need to be able to desaturate images.

Now, everything I have ever seen says to use the color matrix filter… and this does work on the pc… however, because I am deploying on the iPhone - filters - ALL FILTERS, are not supported… and therefor do nothing.

Is there a way I can turn a color bitmapData into a greyscale image without having to use a colormatrix filter, or any other filter?