Module sample 

Functions and filters for the sampling of pixels.

Structs

Filter 🔒

A Representation of a separable filter.

FloatNearest 🔒

GaussianBlurParameters

Holds analytical gaussian blur representation

ThumbnailSum 🔒

Local struct for keeping track of pixel sums for fast thumbnail averaging

Enums

FilterType

Available Sampling Filters.

Functions

bc_cubic_spline 🔒

blur

Performs a Gaussian blur on the supplied image.

blur_advanced

Performs a Gaussian blur on the supplied image.

box_kernel 🔒

Calculate the box kernel. Only pixels inside the box should be considered, and those contribute equally. So this method simply returns 1.

catmullrom_kernel 🔒

Calculate the Catmull-Rom cubic spline. Also known as a form of BiCubic sampling in two dimensions.

filter3x3

Perform a 3x3 box filter on the supplied image.

gaussian 🔒

The Gaussian Function. r is the standard deviation.

gaussian_blur_dyn_image 🔒

gaussian_blur_indirect 🔒

gaussian_blur_indirect_impl 🔒

gaussian_kernel 🔒

Calculate the gaussian function with a standard deviation of 0.5

get_gaussian_kernel_1d 🔒

horizontal_sample 🔒

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.

lanczos 🔒

lanczos3_kernel 🔒

Calculate the lanczos kernel with a window of 3

resize

Resize the supplied image to the specified dimensions.

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.

sinc 🔒

thumbnail

Resize the supplied image to the specific dimensions.

thumbnail_sample_block 🔒

Get a pixel for a thumbnail where the input window encloses at least a full pixel.

thumbnail_sample_fraction_both 🔒

Get a single pixel for a thumbnail where the input window does not enclose any full pixel.

thumbnail_sample_fraction_horizontal 🔒

Get a thumbnail pixel where the input window encloses at least a vertical pixel.

thumbnail_sample_fraction_vertical 🔒

Get a thumbnail pixel where the input window encloses at least a horizontal pixel.

triangle_kernel 🔒

Calculate the triangle function. Also known as BiLinear sampling in two dimensions.

unsharpen

Performs an unsharpen mask on the supplied image.

vertical_sample 🔒