View Source Image.BandFormat (image v0.55.2)
Functions to define and validate the band formats of an image.
Summary
Functions
Returns a list of the known band formats.
Validates a band format returning the band
format value required in the underlying
Vix code.
Types
@type t() ::
{:u, 8}
| {:s, 8}
| {:u, 16}
| {:s, 16}
| {:u, 32}
| {:s, 32}
| {:u, 64}
| {:s, 64}
| {:f, 32}
| {:f, 64}
Functions
Returns the Image format type for an
Nx format type.
Image uses the same type formats as Nx so
this function is more a validation than a
conversion.
Arguments
- Any
Nxtype like{:u, 8}.
Returns
{:ok, band_format}or{:error, reason}
Returns a list of the known band formats.
Returns the Nx format type for an
Image or image format type.
Image uses the same type formats as Nx so
this function is more a validation than a
conversion.
Arguments
- Any
t:Vimage.t/0of format in the list returned byImage.BandFormat.known_band_formats/0.
Returns
{:ok, band_format}or{:error, reason}
Returns the Nx format type for an
Image or image format type or raises
an exception.
Image uses the same type formats as Nx so
this function is more a validation than a
conversion.
Arguments
- Any
t:Vimage.t/0of format in the list returned byImage.BandFormat.known_band_formats/0.
Returns
band_formatorraises an exception.
Validates a band format returning the band
format value required in the underlying
Vix code.
Arguments
formatis any format returned byImage.BandFormat.known_band_formats/0.
Returns
{:ok, validated_foramt}or{:error, reason}
Examples
iex> Image.BandFormat.validate({:u, 8})
{:ok, :VIPS_FORMAT_UCHAR}
iex> Image.BandFormat.validate(:u8)
{:ok, :VIPS_FORMAT_UCHAR}
iex> Image.BandFormat.validate(:VIPS_FORMAT_UCHAR)
{:ok, :VIPS_FORMAT_UCHAR}