Module imageops

Image Processing Functions

Re-exports

pub use self::sample::FilterType::CatmullRom;

pub use self::sample::FilterType::Gaussian;

pub use self::sample::FilterType::Lanczos3;

pub use self::sample::FilterType::Nearest;

pub use self::sample::FilterType::Triangle;

pub use self::colorops::brighten;

pub use self::colorops::contrast;

pub use self::colorops::dither;

pub use self::colorops::grayscale;

pub use self::colorops::grayscale_alpha;

pub use self::colorops::grayscale_with_type;

pub use self::colorops::grayscale_with_type_alpha;

pub use self::colorops::huerotate;

pub use self::colorops::index_colors;

pub use self::colorops::invert;

pub use self::colorops::BiLevel;

pub use self::colorops::ColorMap;

Modules

colorops

Functions for altering and converting the color of pixelbufs

Enums

FilterType

Available Sampling Filters.

Functions

blur

Image sampling Performs a Gaussian blur on the supplied image. sigma is a measure of how much to blur by. Use crate::imageops::fast_blur() for a faster but less accurate version.

crop

Return a mutable view into an image The coordinates set the position of the top left corner of the crop.

crop_imm

Return an immutable view into an image The coordinates set the position of the top left corner of the crop.

fast_blur

Approximation of Gaussian blur after Kovesi, P.: Fast Almost-Gaussian Filtering The Australian Pattern Recognition Society Conference: DICTA 2010. December 2010. Sydney.

filter3x3

Image sampling Perform a 3x3 box filter on the supplied image. kernel is an array of the filter weights of length 9.

flip_horizontal

Affine transformations Flip an image horizontally

flip_horizontal_in

Affine transformations Flip an image horizontally and put the result into the destination ImageBuffer.

flip_horizontal_in_place

Affine transformations Flip an image horizontally in place.

flip_vertical

Affine transformations Flip an image vertically

flip_vertical_in

Affine transformations Flip an image vertically and put the result into the destination ImageBuffer.

flip_vertical_in_place

Affine transformations Flip an image vertically in place.

horizontal_gradient

Fill the image with a linear horizontal gradient

interpolate_bilinear

Image sampling Linearly sample from an image using coordinates in [0, w-1] and [0, h-1].

interpolate_nearest

Image sampling Sample from an image using coordinates in [0, w-1] and [0, h-1], taking the nearest pixel.

overlay

Overlay an image at a given coordinate (x, y)

overlay_bounds

Calculate the region that can be copied from top to bottom.

replace

Replace the contents of an image at a given coordinate (x, y)

resize

Image sampling Resize the supplied image to the specified dimensions. nwidth and nheight are the new dimensions. filter is the sampling filter to use.

rotate90

Affine transformations Rotate an image 90 degrees clockwise.

rotate90_in

Affine transformations Rotate an image 90 degrees clockwise and put the result into the destination ImageBuffer.

rotate180

Affine transformations Rotate an image 180 degrees clockwise.

rotate270

Affine transformations Rotate an image 270 degrees clockwise.

rotate180_in

Affine transformations Rotate an image 180 degrees clockwise and put the result into the destination ImageBuffer.

rotate180_in_place

Affine transformations Rotate an image 180 degrees clockwise in place.

rotate270_in

Affine transformations Rotate an image 270 degrees clockwise and put the result into the destination ImageBuffer.

sample_bilinear

Image sampling Linearly sample from an image using coordinates in [0, 1].

sample_nearest

Image sampling Sample from an image using coordinates in [0, 1], taking the nearest coordinate.

thumbnail

Image sampling Resize the supplied image to the specific dimensions.

tile

Tile an image by repeating it multiple times

unsharpen

Image sampling Performs an unsharpen mask on the supplied image. sigma is the amount to blur the image by. threshold is the threshold for minimal brightness change that will be sharpened.

vertical_gradient

Fill the image with a linear vertical gradient