| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/git/checkouts/incubator-teaclave-crates-c8106113f74feefc/ede1f68/rustface/src/math/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../rustface/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../rustface/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="comment">// This file is part of the open-source port of SeetaFace engine, which originally includes three modules: |
| // SeetaFace Detection, SeetaFace Alignment, and SeetaFace Identification. |
| // |
| // This file is part of the SeetaFace Detection module, containing codes implementing the face detection method described in the following paper: |
| // |
| // Funnel-structured cascade for multi-view face detection with alignment awareness, |
| // Shuzhe Wu, Meina Kan, Zhenliang He, Shiguang Shan, Xilin Chen. |
| // In Neurocomputing (under review) |
| // |
| // Copyright (C) 2016, Visual Information Processing and Learning (VIPL) group, |
| // Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China. |
| // |
| // As an open-source face recognition engine: you can redistribute SeetaFace source codes |
| // and/or modify it under the terms of the BSD 2-Clause License. |
| // |
| // You should have received a copy of the BSD 2-Clause License along with the software. |
| // If not, see < https://opensource.org/licenses/BSD-2-Clause>. |
| |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>copy_u8_to_i32(src: <span class="kw-2">&</span>[u8], dest: <span class="kw-2">&mut </span>[i32]) { |
| <span class="kw">let </span>dest = <span class="kw-2">&mut </span>dest[<span class="number">0</span>..src.len()]; <span class="comment">// eliminates a branch from the loop |
| </span><span class="kw">for </span>(value, dest) <span class="kw">in </span>src.iter().copied().zip(dest.iter_mut()) { |
| <span class="kw-2">*</span>dest = i32::from(value); |
| } |
| } |
| |
| <span class="kw">pub fn </span>square(src: <span class="kw-2">&</span>[i32], dest: <span class="kw-2">&mut </span>[u32]) { |
| <span class="kw">for </span>(value, dest) <span class="kw">in </span>src.iter().copied().zip(dest.iter_mut()) { |
| <span class="kw-2">*</span>dest = i32::pow(value, <span class="number">2</span>) <span class="kw">as </span>u32; |
| } |
| } |
| |
| <span class="kw">pub unsafe fn </span>abs(src: <span class="kw-2">*const </span>i32, dest: <span class="kw-2">*mut </span>i32, length: usize) { |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..length <span class="kw">as </span>isize { |
| <span class="kw">let </span>value = <span class="kw-2">*</span>src.offset(i); |
| <span class="kw-2">*</span>dest.offset(i) = <span class="kw">if </span>value >= <span class="number">0 </span>{ value } <span class="kw">else </span>{ -value }; |
| } |
| } |
| |
| <span class="kw">pub unsafe fn </span>vector_add(left: <span class="kw-2">*const </span>i32, right: <span class="kw-2">*const </span>i32, dest: <span class="kw-2">*mut </span>i32, length: usize) { |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..length <span class="kw">as </span>isize { |
| <span class="kw-2">*</span>dest.offset(i) = <span class="kw-2">*</span>left.offset(i) + <span class="kw-2">*</span>right.offset(i); |
| } |
| } |
| |
| <span class="kw">pub unsafe fn </span>vector_sub(left: <span class="kw-2">*const </span>i32, right: <span class="kw-2">*const </span>i32, dest: <span class="kw-2">*mut </span>i32, length: usize) { |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..length <span class="kw">as </span>isize { |
| <span class="kw-2">*</span>dest.offset(i) = <span class="kw-2">*</span>left.offset(i) - <span class="kw-2">*</span>right.offset(i); |
| } |
| } |
| |
| <span class="kw">pub fn </span>vector_inner_product(left: <span class="kw-2">&</span>[f32], right: <span class="kw-2">&</span>[f32]) -> f32 { |
| left.iter() |
| .copied() |
| .zip(right.iter().copied()) |
| .map(|(l, r)| l * r) |
| .sum() |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_square() { |
| <span class="kw">let </span><span class="kw-2">mut </span>vec = <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]; |
| square(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>], <span class="kw-2">&mut </span>vec); |
| <span class="macro">assert_eq!</span>(<span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">4</span>, <span class="number">9</span>], vec); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_abs() { |
| <span class="kw">let </span><span class="kw-2">mut </span>vec = <span class="macro">vec!</span>[-<span class="number">1</span>, <span class="number">2</span>, -<span class="number">3</span>]; |
| <span class="kw">unsafe </span>{ abs(vec.as_ptr(), vec.as_mut_ptr(), vec.len()) }; |
| <span class="macro">assert_eq!</span>(<span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>], vec); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_vector_add() { |
| <span class="kw">let </span><span class="kw-2">mut </span>vec = <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]; |
| <span class="kw">unsafe </span>{ vector_add(vec.as_ptr(), vec.as_ptr(), vec.as_mut_ptr(), vec.len()) }; |
| <span class="macro">assert_eq!</span>(<span class="macro">vec!</span>[<span class="number">2</span>, <span class="number">4</span>, <span class="number">6</span>], vec); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_vector_sub() { |
| <span class="kw">let </span><span class="kw-2">mut </span>vec = <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]; |
| <span class="kw">unsafe </span>{ vector_sub(vec.as_ptr(), vec.as_ptr(), vec.as_mut_ptr(), vec.len()) }; |
| <span class="macro">assert_eq!</span>(<span class="macro">vec!</span>[<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>], vec); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_vector_inner_product() { |
| <span class="kw">let </span>vec = <span class="macro">vec!</span>[<span class="number">1.0</span>, <span class="number">2.0</span>, <span class="number">3.0</span>]; |
| <span class="kw">let </span>result = vector_inner_product(<span class="kw-2">&</span>vec, <span class="kw-2">&</span>vec); |
| <span class="macro">assert_eq!</span>(<span class="number">14.0</span>, result); |
| } |
| } |
| </code></pre></div> |
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