Computer Vision on Your Browser With SVG Filters

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SVG Filters is a powerful web technology that managed to elude the mainstream. It allows us to write computer vision primitives, that when combined can create amazing effects with just a few lines of SVG markup.

In this talk we'll dive into some code examples of using SVG filters, like creating a live webcam green screen filter, adding an infrared effect to the screen, and other cool effects you wouldn't believe your browser can do so easily.

This talk has been presented at JSNation US 2024, check out the latest edition of this JavaScript Conference.

FAQ

Cover with Double V is a swag store platform that allows users to open swag stores and send branded gifts globally to employees to celebrate various milestones.

Cover with Double V uses computer vision on the browser, leveraging SVG Filters to create various visual effects.

SVG Filters are used to create a variety of visual effects, such as green screen, frosted glass, infrared effects, and more, without the need for JavaScript.

SVG Filters can be applied to various elements like images, videos, and text, allowing developers to create visual effects such as frosted glass or infrared effects using simple SVG markup.

A green screen filter is created using SVG Filters by making green pixels transparent, allowing the background to be visible. This is achieved by manipulating pixel values through a color matrix and component transfer.

The displacement map in SVG Filters displaces pixels of an image based on x-axis and y-axis values defined by noise, using the red and green color channels to determine the displacement amount.

A color matrix in SVG Filters is used to transform the color of each pixel by multiplying it with a matrix, allowing for effects like color inversion or converting an image to a single color channel.

SVG Filters are considered performant because they run on the GPU, allowing them to efficiently process visual effects even on live webcam feeds.

Working with SVG Filters is unique because it requires a creative and experimental approach, allowing developers to explore and create effects without predefined methods, unlike typical structured development tasks.

Yes, SVG Filters are supported in all major browsers, making them a versatile choice for creating visual effects on the web.

Adam Klein
Adam Klein
22 min
21 Nov, 2024

Comments

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  • Va Da
    Va Da
    P4
    No card trick revealed at the end :(
  • Va Da
    Va Da
    P4
    TIL: SVG filter, will definitely use in my projects
Video Summary and Transcription
I'm Adam Klein, the CTO and co-founder of Cover with Double V, a swag store platform. We use computer vision to create cool effects with SVG filters. In this talk, I'll share two magic tricks and teach you how to create a green screen filter using SVG markup. I can apply different filters on text, images, and videos using HTML or SVG. SVG filters allow easy debugging and parameter manipulation. The displacement map is a simple primitive that displaces pixels based on the red and green values. The frosted glass effect is achieved by using the displacement map filter. The green screen filter selectively reduces the opacity of green pixels while keeping other pixels opaque. After experimenting with different values, I discovered a formula that effectively applies the green screen filter using SVG filters. SVG filters are widely used in production and are supported in all major browsers. They are highly performant, running on the GPU. Working with SVG filters requires creativity and experimentation to achieve desired effects.
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