Mikko Koppanen is back with a tip for users of the ImagickPixelIterator functionality of Imagick - it's not read-only after all.

A few days ago I got a help request from a user: "How do you change pixel color during the iteration with ImagickPixelIterator". My initial response was that ImagickPixelIterator is read-only. Well, I have to admit I was wrong. After searching trough ImageMagick docs I stumbled across an example and noticed that PixelIterator (and therefor ImagickPixelIterator) is not read-only after all.

He illustrates with a code example, one showing how to make the object from an image and how to update every second pixel to be black. Source and result images are also included.

Mikko Koppanen is back with a tip for users of the ImagickPixelIterator functionality of Imagick - it's not read-only after all.

A few days ago I got a help request from a user: "How do you change pixel color during the iteration with ImagickPixelIterator". My initial response was that ImagickPixelIterator is read-only. Well, I have to admit I was wrong. After searching trough ImageMagick docs I stumbled across an example and noticed that PixelIterator (and therefor ImagickPixelIterator) is not read-only after all.

He illustrates with a code example, one showing how to make the object from an image and how to update every second pixel to be black. Source and result images are also included.