CODEWITHSUNDEEP
iosobjective-cuiimageview
Gobinath Ed
Gobinath Ed

Reputation: 229

How can I increase/decrease the brightness of UIImage and I need to save the resultant image?

I've an image , I want to change its brightness and I need to save the resultant image obtained from the actual image, how can I do it. I want to increase the brightness using a UIslider?

Upvotes: 1

Views: 6270

Answers (2)

Bikram Thapa
Bikram Thapa

Reputation: 1339

Here's the sample code and explanation about implementing simple image processing filters (Brightness, Contrast, Saturation, Hue rotation, Sharpness) using OpenGL ES1.1. I recommend you this apple's official link here

Upvotes: -1

Apurv
Apurv

Reputation: 17186

Get the code from the Github for UIImage category here.

To brighten the image, write the code as below:

//brighten value can be obtained from slider change event from -255 to 255.
UIImage* brightImage = [originalImage brightenWithValue:sliderValue];

//Convert image into data
NSData *brightImageData = UIImagePNGRepresentation(brightImage);

//Get the path of Documents directory and store the data object to proper file

Upvotes: 7

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