Understanding Convolution Filters in Image Processing (and Adding Them to Ruby-LibGD v0.2.5)

March 3, 2026

Today I implemented support for custom convolution filters in Ruby-LibGD , enabling the application of kernels such as blur, sharpen, and edge detection directly from Ruby.

At first glance, this may look like just another image filter. In reality, convolution is one of the most fundamental operations in image processing and computer vision.

Many common effects — from sharpening photos to detecting edges — are built on this simple mathematical concept.

Let’s explore what convolution is and how it can now be used with Ruby-LibGD.

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👉 Read the full article.

https://rubystacknews.com/2026/03/03/understanding-convolution-filters-in-image-processing-and-adding-them-to-ruby-libgd-v0-2-5/

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Ruby-LibGD continues to evolve — and there’s much more coming.