imageops - image

Modules

colorops Functions for altering and converting the color of pixelbufs

Structs

BiLevel A bi-level color map

Enums

FilterType Available Sampling Filters.

Traits

ColorMap A color map

Functions

blur 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.
brighten Brighten the supplied image. value is the amount to brighten each pixel by. Negative values decrease the brightness and positive values increase it.
contrast Adjust the contrast of the supplied image. contrast is the amount to adjust the contrast by. Negative values decrease the contrast and positive values increase the contrast.
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.
dither Reduces the colors of the image using the supplied color_map while applying Floyd-Steinberg dithering to improve the visual conception
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 Perform a 3x3 box filter on the supplied image. kernel is an array of the filter weights of length 9.
flip_horizontal Flip an image horizontally
flip_horizontal_in Flip an image horizontally and put the result into the destination ImageBuffer.
flip_horizontal_in_place Flip an image horizontally in place.
flip_vertical Flip an image vertically
flip_vertical_in Flip an image vertically and put the result into the destination ImageBuffer.
flip_vertical_in_place Flip an image vertically in place.
grayscale Convert the supplied image to grayscale. Alpha channel is discarded.
grayscale_alpha Convert the supplied image to grayscale. Alpha channel is preserved.
grayscale_with_type Convert the supplied image to a grayscale image with the specified pixel type. Alpha channel is discarded.
grayscale_with_type_alpha Convert the supplied image to a grayscale image with the specified pixel type. Alpha channel is preserved.
horizontal_gradient Fill the image with a linear horizontal gradient
huerotate Hue rotate the supplied image. value is the degrees to rotate each pixel by. 0 and 360 do nothing, the rest rotates by the given degree value. just like the css webkit filter hue-rotate(180)
index_colors Reduces the colors using the supplied color_map and returns an image of the indices
interpolate_bilinear Linearly sample from an image using coordinates in [0, w-1] and [0, h-1].
interpolate_nearest Sample from an image using coordinates in [0, w-1] and [0, h-1], taking the nearest pixel.
invert Invert each pixel within the supplied image. This function operates in place.
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 Resize the supplied image to the specified dimensions. nwidth and nheight are the new dimensions. filter is the sampling filter to use.
rotate180 Rotate an image 180 degrees clockwise.
rotate180_in Rotate an image 180 degrees clockwise and put the result into the destination ImageBuffer.
rotate180_in_place Rotate an image 180 degrees clockwise in place.
rotate270 Rotate an image 270 degrees clockwise.
rotate270_in Rotate an image 270 degrees clockwise and put the result into the destination ImageBuffer.
rotate90 Rotate an image 90 degrees clockwise.
rotate90_in Rotate an image 90 degrees clockwise and put the result into the destination ImageBuffer.
sample_bilinear Linearly sample from an image using coordinates in [0, 1].
sample_nearest Sample from an image using coordinates in [0, 1], taking the nearest coordinate.
thumbnail Resize the supplied image to the specific dimensions.
tile Tile an image by repeating it multiple times
unsharpen 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