index.md

title	linkTitle	description	nav_icon	date	categories	tags	authors
Images Filters	Filters	Learn how to apply filters on images, such as brightness, opacity, and pixelate so on.	vendor name bs filter	2023-03-27 11:23:36 +0800	Docs	Markdown Filters Brightness ColorBalance Colorize Contrast Gamma GaussianBlur Grayscale Hue Invert Pixelate Saturation Sepia Sigmoid UnsharpMask	HugoMods

Brightness

The brightness must be in range (-100, 100).

{{< page-resource-content "data/example-brightness" >}}

ColorBalance

ColorBalance creates a filter that changes the color balance of an image. The percentage parameters for each color channel (red, green, blue) must be in range (-100, 500).

{{< page-resource-content "data/example-color-balance" >}}

Colorize

Colorize creates a filter that produces a colorized version of an image. The hue parameter is the angle on the color wheel, typically in range (0, 360). The saturation parameter must be in range (0, 100). The percentage parameter specifies the strength of the effect, it must be in range (0, 100).

{{< page-resource-content "data/example-colorize" >}}

Contrast

The contrast must be in range (-100, 100).

{{< page-resource-content "data/example-contrast" >}}

Gamma

Gamma creates a filter that performs a gamma correction on an image. The gamma parameter must be positive. Gamma = 1 gives the original image. Gamma less than 1 darkens the image and gamma greater than 1 lightens it.

{{< page-resource-content "data/example-gamma" >}}

GaussianBlur

Applies a gaussian blur to an image.

{{< page-resource-content "data/example-gaussian-blur" >}}

Grayscale

Grayscale creates a filter that produces a grayscale version of an image.

{{< page-resource-content "data/example-grayscale" >}}

Hue

Hue creates a filter that rotates the hue of an image. The hue angle shift is typically in range -180 to 180.

{{< page-resource-content "data/example-hue" >}}

Invert

Invert creates a filter that negates the colors of an image.

{{< page-resource-content "data/example-invert" >}}

Opacity

Apply a opacity filter on an image.

{{< page-resource-content "data/example-opacity" >}}

Pixelate

Pixelate creates a filter that applies a pixelation effect to an image.

{{< page-resource-content "data/example-pixelate" >}}

Saturation

Saturation creates a filter that changes the saturation of an image.

{{< page-resource-content "data/example-saturation" >}}

Sepia

Sepia creates a filter that produces a sepia-toned version of an image.

{{< page-resource-content "data/example-sepia" >}}

Sigmoid

Sigmoid creates a filter that changes the contrast of an image using a sigmoidal function and returns the adjusted image. It’s a non-linear contrast change useful for photo adjustments as it preserves highlight and shadow detail.

{{< page-resource-content "data/example-sigmoid" >}}

UnsharpMask

UnsharpMask creates a filter that sharpens an image. The sigma parameter is used in a gaussian function and affects the radius of effect. Sigma must be positive. Sharpen radius roughly equals 3 * sigma. The amount parameter controls how much darker and how much lighter the edge borders become. Typically between 0.5 and 1.5. The threshold parameter controls the minimum brightness change that will be sharpened. Typically between 0 and 0.05.

{{< page-resource-content "data/example-unsharp-mask" >}}