• Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
Question by oliver-jones · Jan 09, 2014 at 03:08 PM · texturecolorpixelcolour

Get Average Colour From Texture?

Hello,

Is it possible to get grab every pixel colour from a texture within the scene (applied to a quad), and find the average colour that is being used?

I ask because I want to know how 'bright' the texture is, which will in turn will affect the intensity of a spotlight. Eg: if the texture is fairly bright, and over exposed on average, then the spotlight intensity will be pretty bright and strong. And vise versa.

Thanks

Comment

People who like this

0 Show 0
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

1 Reply

  • Sort: 
avatar image

Answer by robhuhn · Jan 09, 2014 at 03:55 PM

To calculate the brightness of a color you could try this method and then calculate the average brightness of all returned values (not tested):

 private int Brightness(Color c)
 {
     return (int)Mathf.Sqrt(
        c.R * c.R * .241 + 
        c.G * c.G * .691 + 
        c.B * c.B * .068);
 }


@Edit

To get the pixels of a Texture2D just call GetPixels() or GetPixels32()

 Texture2D destTex = new Texture2D(width, height);
 Color[] pixels = destTex.GetPixels();

sources: http://www.nbdtech.com/Blog/archive/2008/04/27/Calculating-the-Perceived-Brightness-of-a-Color.aspx http://docs.unity3d.com/Documentation/ScriptReference/Texture2D.GetPixels.html

Comment

People who like this

0 Show 2 · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image oliver-jones · Jan 09, 2014 at 03:56 PM 0
Share

Okay, thanks - but how do I actually pull the pixel data to begin with?

avatar image robhuhn · Jan 09, 2014 at 04:02 PM 0
Share

Edited my answer

Unity Answers is in Read-Only mode

Unity Answers content will be migrated to a new Community platform and we are aiming to launch a public beta by June 9. Please note, Unity Answers is now in read-only so we can prepare for the final data migration.

For more information and updates, please read our full announcement thread in the Unity Forum.

Follow this Question

Answers Answers and Comments

19 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

How can I change all of a textures pixels to one color? 1 Answer

Get pixel from Rotated Texture2D 2 Answers

How to pixelate an image texture for faster pixel color recognition? 2 Answers

Duplicated objects, different colors 1 Answer

Transparent texture and object with changing color 0 Answers


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges