Enum jpeg_encoder::QuantizationTableType

pub enum QuantizationTableType {
    Default,
    Flat,
    CustomMsSsim,
    CustomPsnrHvs,
    ImageMagick,
    KleinSilversteinCarney,
    DentalXRays,
    VisualDetectionModel,
    ImprovedDetectionModel,
    Custom(Box<[u16; 64]>),
}

Quantization table used for encoding

Tables are based on tables from mozjpeg

Variants

Default

Sample quantization tables given in Annex K (Clause K.1) of Recommendation ITU-T T.81 (1992) | ISO/IEC 10918-1:1994.

Flat

Flat

CustomMsSsim

Custom, tuned for MS-SSIM

CustomPsnrHvs

Custom, tuned for PSNR-HVS

ImageMagick

ImageMagick table by N. Robidoux

From http://www.imagemagick.org/discourse-server/viewtopic.php?f=22&t=20333&p=98008#p98008

KleinSilversteinCarney

Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.

DentalXRays

DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick

VisualDetectionModel

A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson

ImprovedDetectionModel

An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson

Custom(Box<[u16; 64]>)

A user supplied quantization table

Trait Implementations

impl Clone for QuantizationTableType

fn clone(&self) -> QuantizationTableType

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for QuantizationTableType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.