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want to add hue filter in iPhone app
I want to write a code to add Hue Image Effect with different parameter value of Hue value by modifying the pixel value of Image. How can I do this.
Overall I want to add Hue Image Filter by manipulating each Pixel value of Image. But waht the actual value for Pixel in adding Hue effect.
You need to use CoreImage for that, specifically a CIFilter.
There are plenty of examples online, but there’s one in the apple developer website that matches exactly what you want:
Go to here and check the section “Creating a CIFilter Object and Setting Values”, there it shows how to create a hue filter for a given image.