Image.Kernel (image v0.59.0)

Defines the known resampling kernels to which an image can be converted to and from.

Summary

Types

t()

Defines the known kernel resampling methods.

Functions

known_kernel()

Returns the known colorspace interpretations

validate_kernel(kernel)

Normalizes and validates a resampling kernel.

Types

t()

@type t() :: :lanczos2 | :mitchell | :cubic | :linear | :lanczos3 | :nearest

Defines the known kernel resampling methods.

Functions

known_kernel()

Returns the known colorspace interpretations

validate_kernel(kernel)

Normalizes and validates a resampling kernel.

Arguments

kernel is any atom or string value in Image.Kernel.known_kernel/0.

Returns

{:error, normalized_kernel} or
{:error, reason}

Examples

iex> Image.Kernel.validate_kernel(:linear)
{:ok, :VIPS_KERNEL_LINEAR}

iex> Image.Kernel.validate_kernel(:VIPS_KERNEL_CUBIC)
{:ok, :VIPS_KERNEL_CUBIC}

iex> Image.Kernel.validate_kernel(:unknown)
{:error, "Unknown kernel. Found :unknown"}