Crate lepcc 

LEPCC - Limited Error Point Cloud Compression

A Rust implementation of the LEPCC compression algorithm originally developed by Esri. This library provides lossless compression for 3D point cloud data including coordinates, colors, intensity, and flag bytes.

Features

• XYZ Compression: Lossy compression of 3D coordinates with configurable error tolerance
• RGB Compression: Color clustering and quantization with up to 3x compression
• Intensity Compression: Lossless compression of intensity values
• Flag Bytes Compression: Lossless compression of flag/class data
• I3S Format Support: Compatible with I3S point cloud format (.pccxyz and .pccrgb)

Example

use lepcc::prelude::*;

// Compress XYZ coordinates with 1cm accuracy
let points = vec![
    [0.0, 0.0, 0.0],
    [1.0, 1.0, 1.0],
    // ... more points
];
let compressed = compress_xyz(&points, 0.01, 0.01, 0.01)?;

// Decompress
let decompressed = decompress_xyz(&compressed)?;

Re-exports

pub use error::LepccError;

pub use error::Result;

pub use types::*;

pub use api::*;

Modules

api

High-level API for LEPCC compression and decompression

bit_mask

BitMask - Convenient and fast access to binary mask bits

bit_stuffer2

BitStuffer2 - Bit level compression for unsigned integer arrays

cluster_rgb

ClusterRGB - Color compression using quantization/clustering

common

Common utilities - Fletcher’s checksum

error

Error types for LEPCC operations

flag_bytes

FlagBytes compression implementation

huffman

Huffman coding implementation

intensity

Intensity compression implementation

lepcc_xyz

LEPCC XYZ compression implementation - Simplified version for testing

prelude

Prelude module for common imports

types

Type definitions for LEPCC library

Constants

VERSION_LEPCC

VERSION_LEPCC_FLAGBYTES

VERSION_LEPCC_INTENSITY

VERSION_LEPCC_RGB

VERSION_LEPCC_XYZ