Crate demosaic 

Demosaicing algorithms for Bayer, Quad Bayer, and X-Trans CFA sensors.

Takes single-channel CFA (color filter array) sensor data and reconstructs full-color RGB images. Supports 2x2 Bayer patterns (RGGB, BGGR, GRBG, GBRG), 4x4 Quad Bayer patterns, and 6x6 Fujifilm X-Trans patterns.

Algorithms

Bayer:

• Bilinear — simple neighbor averaging
• Mhc — Malvar-He-Cutler gradient-corrected interpolation
• Ppg — Patterned Pixel Grouping
• Ahd — Adaptive Homogeneity-Directed
• Vng — Variable Number of Gradients

Quad Bayer:

• Bilinear — 5x5 neighbor averaging
• QuadPpg — gradient-based direct demosaicing
• demosaic_quad_binned — 2x2 binning + any Bayer algorithm (half resolution)
• remosaic — convert to standard Bayer, then use any Bayer algorithm

X-Trans:

• Bilinear — simple neighbor averaging
• Markesteijn1 — 1-pass, 4 directions
• Markesteijn3 — 3-pass with median refinement
• Dht — Directional Homogeneity Test

Example

use demosaic::{demosaic, Algorithm, CfaPattern};

let width = 4;
let height = 4;
let cfa = CfaPattern::bayer_rggb();
let input = vec![0.5f32; width * height];
let mut output = vec![0.0f32; 3 * width * height];

demosaic(&input, width, height, &cfa, Algorithm::Bilinear, &mut output).unwrap();

// output is planar CHW: [R plane, G plane, B plane]
let r_plane = &output[..width * height];
let g_plane = &output[width * height..2 * width * height];
let b_plane = &output[2 * width * height..];

Structs

CfaPattern

CFA pattern descriptor for both 2x2 Bayer and 6x6 X-Trans sensors.

Enums

Algorithm

Demosaicing algorithm selection.

BayerAlgorithm

Bayer-only demosaicing algorithm, used as inner algorithm for Quad Bayer binning.

Channel

Color channel in a CFA pattern.

DemosaicError

Errors returned by demosaicing operations.

Functions

bin2x2

2x2-bin a single-channel image by averaging each 2x2 block of pixels.

demosaic

Demosaic a single-channel CFA image to 3-channel RGB.

demosaic_interleaved

Demosaic a single-channel CFA image to interleaved 3-channel RGB.

demosaic_quad_binned

Demosaic a Quad Bayer CFA image via 2x2 binning + standard Bayer demosaic.

demosaic_quad_binned_interleaved

Demosaic a Quad Bayer CFA image via binning to interleaved RGB output.

interleaved_to_planar

Convert interleaved HWC layout to planar CHW between two buffers.

planar_to_interleaved

Convert planar CHW layout to interleaved HWC between two buffers.

remosaic

Convert Quad Bayer raw data to Standard Bayer raw data at the same resolution.