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<a href="../../_sources/functionlib/dsplib/priorbox.rst.txt" rel="nofollow"> 查看页面源码</a>
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<section id="priorbox">
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<h1>Priorbox<a class="headerlink" href="#priorbox" title="Link to this heading"></a></h1>
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<p>根据输入的特征图尺寸、步长和预设的候选框配置，逐元素计算先验框（Prior Boxes），通常用于目标检测模型。</p>
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<p>该算子遍历特征图的每一个网格中心点，并围绕该中心点生成一系列具有不同尺寸和宽高比的候选框。生成的坐标 <code class="docutils literal notranslate"><span class="pre">[xmin,</span> <span class="pre">ymin,</span> <span class="pre">xmax,</span> <span class="pre">ymax]</span></code> 经过归一化处理。</p>
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<dl class="simple">
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<dt>输入：</dt><dd><ul class="simple">
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<li><p><strong>fmap_h</strong> - 当前特征图的高度。</p></li>
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<li><p><strong>fmap_w</strong> - 当前特征图的宽度。</p></li>
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<li><p><strong>step_h</strong> - 计算先验框在原图上坐标时的垂直缩放比例。</p></li>
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<li><p><strong>step_w</strong> - 计算先验框在原图上坐标时的水平缩放比例。</p></li>
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<li><p><strong>offset</strong> - 中心点偏移量，通常为0.5，表示取网格的正中心。</p></li>
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<li><p><strong>min_sizes</strong> - 定义基础先验框尺寸的浮点数数组。</p></li>
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<li><p><strong>min_sizes_size</strong> - <code class="docutils literal notranslate"><span class="pre">min_sizes</span></code> 数组的长度。</p></li>
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<li><p><strong>max_sizes</strong> - 可选的浮点数数组，用于生成额外的正方形先验框。</p></li>
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<li><p><strong>max_sizes_size</strong> - <code class="docutils literal notranslate"><span class="pre">max_sizes</span></code> 数组的长度。</p></li>
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<li><p><strong>different_aspect_ratios</strong> - 定义不同宽高比的浮点数数组。</p></li>
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<li><p><strong>different_aspect_ratios_size</strong> - <code class="docutils literal notranslate"><span class="pre">different_aspect_ratios</span></code> 数组的长度。</p></li>
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<li><p><strong>core_mask</strong> - 核掩码 (仅共享存储版本需要)。</p></li>
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</ul>
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</dd>
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<dt>输出：</dt><dd><ul class="simple">
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<li><p><strong>output</strong> - 用于存储最终生成的先验框坐标的数组。</p></li>
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<li><p><strong>output_size</strong> - 指向一个整数的指针，函数执行后，该整数将记录写入 <code class="docutils literal notranslate"><span class="pre">output</span></code> 数组的浮点数总数。</p></li>
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</ul>
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</dd>
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<dt>支持平台：</dt><dd><p><code class="docutils literal notranslate"><span class="pre">6678</span></code>
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<code class="docutils literal notranslate"><span class="pre">7004</span></code></p>
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</dd>
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</dl>
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<div class="admonition note">
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<p class="admonition-title">备注</p>
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<ul class="simple">
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<li><p>6678支持fp32类型。</p></li>
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<li><p>7004支持fp16和fp32类型。</p></li>
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</ul>
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</div>
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<p><strong>共享存储版本:</strong></p>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.fp_priorbox_s">
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<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">fp_priorbox_s</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">fmap_h</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">fmap_w</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="n"><span class="pre">step_h</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="n"><span class="pre">step_w</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="n"><span class="pre">offset</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">min_sizes</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">min_sizes_size</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">max_sizes</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">max_sizes_size</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">different_aspect_ratios</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">different_aspect_ratios_size</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output_size</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">core_mask</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.fp_priorbox_s" title="Link to this definition"></a><br /></dt>
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<dd></dd></dl>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.hp_priorbox_s">
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<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">hp_priorbox_s</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">fmap_h</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">fmap_w</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="n"><span class="pre">step_h</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="n"><span class="pre">step_w</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="n"><span class="pre">offset</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">min_sizes</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">min_sizes_size</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">max_sizes</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">max_sizes_size</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">different_aspect_ratios</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">different_aspect_ratios_size</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output_size</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">core_mask</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.hp_priorbox_s" title="Link to this definition"></a><br /></dt>
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<dd></dd></dl>
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<p><strong>C调用示例：</strong></p>
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<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="cp">#include</span><span class="w"> </span><span class="cpf">"priorbox.h"</span>
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<span class="linenos"> 2</span>
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<span class="linenos"> 3</span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
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<span class="linenos"> 4</span><span class="w"> </span><span class="c1">// DDR memory pointers</span>
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<span class="linenos"> 5</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">min_sizes</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0xA0000000</span><span class="p">;</span>
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<span class="linenos"> 6</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">max_sizes</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0xA0001000</span><span class="p">;</span>
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<span class="linenos"> 7</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">ratios</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0xA0002000</span><span class="p">;</span>
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<span class="linenos"> 8</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="n">output</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="kt">float</span><span class="w"> </span><span class="o">*</span><span class="p">)</span><span class="mh">0xB0000000</span><span class="p">;</span>
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<span class="linenos"> 9</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">output_size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
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<span class="linenos">10</span>
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<span class="linenos">11</span><span class="w"> </span><span class="c1">// Parameters</span>
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<span class="linenos">12</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">fmap_h</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">19</span><span class="p">,</span><span class="w"> </span><span class="n">fmap_w</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">19</span><span class="p">;</span>
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<span class="linenos">13</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">step_h</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">16.0f</span><span class="p">,</span><span class="w"> </span><span class="n">step_w</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">16.0f</span><span class="p">;</span>
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<span class="linenos">14</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">offset</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">0.5f</span><span class="p">;</span>
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<span class="linenos">15</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">min_sizes_size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
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<span class="linenos">16</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">max_sizes_size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
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<span class="linenos">17</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">ratios_size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="p">;</span>
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<span class="linenos">18</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">core_mask</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mh">0xff</span><span class="p">;</span>
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<span class="linenos">19</span>
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<span class="linenos">20</span><span class="w"> </span><span class="c1">// (假设 min_sizes, max_sizes, ratios 已在DDR中填充数据)</span>
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<span class="linenos">21</span>
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<span class="hll"><span class="linenos">22</span><span class="w"> </span><span class="n">fp_priorbox_s</span><span class="p">(</span><span class="n">fmap_h</span><span class="p">,</span><span class="w"> </span><span class="n">fmap_w</span><span class="p">,</span><span class="w"> </span><span class="n">step_h</span><span class="p">,</span><span class="w"> </span><span class="n">step_w</span><span class="p">,</span><span class="w"> </span><span class="n">offset</span><span class="p">,</span><span class="w"> </span><span class="n">min_sizes</span><span class="p">,</span><span class="w"> </span><span class="n">min_sizes_size</span><span class="p">,</span><span class="w"> </span><span class="n">max_sizes</span><span class="p">,</span><span class="w"> </span><span class="n">max_sizes_size</span><span class="p">,</span><span class="w"> </span><span class="n">ratios</span><span class="p">,</span><span class="w"> </span><span class="n">ratios_size</span><span class="p">,</span><span class="w"> </span><span class="n">output</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">output_size</span><span class="p">,</span><span class="w"> </span><span class="n">core_mask</span><span class="p">);</span>
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</span><span class="linenos">23</span>
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<span class="linenos">24</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
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<span class="linenos">25</span><span class="p">}</span>
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</pre></div>
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</div>
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<p><strong>私有存储版本:</strong></p>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.fp_priorbox_p">
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<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">fp_priorbox_p</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">fmap_h</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">fmap_w</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="n"><span class="pre">step_h</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="n"><span class="pre">step_w</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="n"><span class="pre">offset</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">min_sizes</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">min_sizes_size</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">max_sizes</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">max_sizes_size</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">different_aspect_ratios</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">different_aspect_ratios_size</span></span>, <span class="kt"><span class="pre">float</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output_size</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.fp_priorbox_p" title="Link to this definition"></a><br /></dt>
|
||
<dd></dd></dl>
|
||
|
||
<dl class="c function">
|
||
<dt class="sig sig-object c" id="c.hp_priorbox_p">
|
||
<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">hp_priorbox_p</span></span></span><span class="sig-paren">(</span><span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">fmap_h</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">fmap_w</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="n"><span class="pre">step_h</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="n"><span class="pre">step_w</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="n"><span class="pre">offset</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">min_sizes</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">min_sizes_size</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">max_sizes</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">max_sizes_size</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">different_aspect_ratios</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="n"><span class="pre">different_aspect_ratios_size</span></span>, <span class="n"><span class="pre">half</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output</span></span>, <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">output_size</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.hp_priorbox_p" title="Link to this definition"></a><br /></dt>
|
||
<dd></dd></dl>
|
||
|
||
<p><strong>C调用示例：</strong></p>
|
||
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="linenos"> 1</span><span class="cp">#include</span><span class="w"> </span><span class="cpf">"priorbox.h"</span>
|
||
<span class="linenos"> 2</span>
|
||
<span class="linenos"> 3</span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="linenos"> 4</span><span class="w"> </span><span class="c1">// L2 memory arrays</span>
|
||
<span class="linenos"> 5</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">min_sizes_data</span><span class="p">[]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mf">30.0f</span><span class="p">};</span>
|
||
<span class="linenos"> 6</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">max_sizes_data</span><span class="p">[]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mf">60.0f</span><span class="p">};</span>
|
||
<span class="linenos"> 7</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">ratios_data</span><span class="p">[]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="mf">2.0f</span><span class="p">,</span><span class="w"> </span><span class="mf">0.5f</span><span class="p">};</span>
|
||
<span class="linenos"> 8</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">output_data</span><span class="p">[</span><span class="mi">4</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">19</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">19</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">2</span><span class="p">)];</span><span class="w"> </span><span class="c1">// 足够大的空间</span>
|
||
<span class="linenos"> 9</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">output_size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">10</span>
|
||
<span class="linenos">11</span><span class="w"> </span><span class="c1">// Parameters</span>
|
||
<span class="linenos">12</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">fmap_h</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">19</span><span class="p">,</span><span class="w"> </span><span class="n">fmap_w</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">19</span><span class="p">;</span>
|
||
<span class="linenos">13</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">step_h</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">16.0f</span><span class="p">,</span><span class="w"> </span><span class="n">step_w</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">16.0f</span><span class="p">;</span>
|
||
<span class="linenos">14</span><span class="w"> </span><span class="kt">float</span><span class="w"> </span><span class="n">offset</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">0.5f</span><span class="p">;</span>
|
||
<span class="linenos">15</span>
|
||
<span class="hll"><span class="linenos">16</span><span class="w"> </span><span class="n">fp_priorbox_p</span><span class="p">(</span><span class="n">fmap_h</span><span class="p">,</span><span class="w"> </span><span class="n">fmap_w</span><span class="p">,</span><span class="w"> </span><span class="n">step_h</span><span class="p">,</span><span class="w"> </span><span class="n">step_w</span><span class="p">,</span><span class="w"> </span><span class="n">offset</span><span class="p">,</span><span class="w"> </span><span class="n">min_sizes_data</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="n">max_sizes_data</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="n">ratios_data</span><span class="p">,</span><span class="w"> </span><span class="mi">2</span><span class="p">,</span><span class="w"> </span><span class="n">output_data</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">output_size</span><span class="p">);</span>
|
||
</span><span class="linenos">17</span>
|
||
<span class="linenos">18</span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
|
||
<span class="linenos">19</span><span class="p">}</span>
|
||
</pre></div>
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