# How to know that a pixel is semi-transparent？

**URL:** <https://discourse.processing.org/t/how-to-know-that-a-pixel-is-semi-transparent/26325>\
**Category:** Beginners\
**Created:** [December 17, 2020, 4:02am UTC](https://discourse.processing.org/t/how-to-know-that-a-pixel-is-semi-transparent/26325 "2020-12-17T04:02:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![AbleYudada](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/ableyudada/32/14190_2.png) [@AbleYudada](https://discourse.processing.org/u/AbleYudada)\
**Post date:** [December 17, 2020, 4:02am UTC](https://discourse.processing.org/t/how-to-know-that-a-pixel-is-semi-transparent/26325/1 "2020-12-17T04:02:01Z")

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Hi guys, is there any way to know if a pixel is semi-transparent？No matter what color it is, I just want to know if it is semi-transparent.

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**Author:** ![jay\_m](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jay_m/32/11020_2.png) [@jay\_m](https://discourse.processing.org/u/jay_m)\
**Post date:** [December 17, 2020, 5:23am UTC](https://discourse.processing.org/t/how-to-know-that-a-pixel-is-semi-transparent/26325/2 "2020-12-17T05:23:44Z")

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Have you tried asking for the alpha value of the color you obtain fox a pixel at coordinates (x,y) by using get()?

> **[alpha() \\ Language (API) \\ Processing 3+](https://processing.org/reference/alpha_.html)**

> **[get() \\ Language (API) \\ Processing 3+](https://processing.org/reference/get_.html)**

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**Author:** ![AbleYudada](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/ableyudada/32/14190_2.png) [@AbleYudada](https://discourse.processing.org/u/AbleYudada)\
**Post date:** [December 17, 2020, 6:51am UTC](https://discourse.processing.org/t/how-to-know-that-a-pixel-is-semi-transparent/26325/3 "2020-12-17T06:51:49Z")

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Nice！！！It works！ Thanks！！ 😛