图像处理与LCD显示 🖼️ 实现图像识别与显示

<pre><span style=" color:#cd8b00;">#</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">Untitled</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">-</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">By:</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">LX</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">-</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">周五</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">3月</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">5</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">2021</span></pre>
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<pre><span style=" color:#409090;">import</span><span style=" color:#646482;"> </span><span style=" color:#808bed;">sensor</span>,<span style=" color:#808bed;">image</span>,<span style=" color:#808bed;">lcd</span>,<span style=" color:#808bed;">time</span></pre>
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<pre><span style=" color:#cd8b00;">#------常用初始化</span><span style=" color:#646482;">   </span><span style=" color:#cd8b00;">↓-------</span></pre>
<pre><span style=" color:#808bed;">lcd</span>.<span style=" color:#ff8bff;">init</span>()</pre>
<pre><span style=" color:#808bed;">sensor</span>.<span style=" color:#ff8bff;">reset</span>()<span style=" color:#646482;">                      </span><span style=" color:#cd8b00;">#复位摄像头</span></pre>
<pre><span style=" color:#808bed;">sensor</span>.<span style=" color:#ff8bff;">set_pixformat</span>(<span style=" color:#808bed;">sensor</span>.<span style=" color:#ff8bff;">RGB565</span>)<span style=" color:#646482;"> </span><span style=" color:#cd8b00;">#</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">设置像素格式</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">RGB565</span></pre>
<pre><span style=" color:#808bed;">sensor</span>.<span style=" color:#ff8bff;">set_framesize</span>(<span style=" color:#808bed;">sensor</span>.<span style=" color:#ff8bff;">QVGA</span>)<span style=" color:#646482;">   </span><span style=" color:#cd8b00;">#</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">设置帧尺寸</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">QVGA</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">(320x240)</span></pre>
<pre><span style=" color:#cd8b00;">#------常用初始化</span><span style=" color:#646482;">   </span><span style=" color:#cd8b00;">↑-------</span></pre>
<pre><span style=" color:#cd8b00;">'''对于</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">RGB565</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">图像，每个元组需要有六个值(l_lo，l_hi，a_lo，a_hi，b_lo，b_hi)</span></pre>
<pre><span style=" color:#cd8b00;">分别是</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">LAB中</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">L，A</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">和</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">B</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">通道的最小值和最大值。</span></pre>
<pre><span style=" color:#cd8b00;">L的取值范围为0-100，a/b</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">的取值范围为-128到127。'''</span></pre>
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<pre><span style=" color:#cd8b00;">#红色阈值[0],绿色阈值[1],蓝色阈值[2]</span></pre>
<pre>rgb_thresholds<span style=" color:#646482;">   </span><span style=" color:#cfbfad;">=</span>[(<span style=" color:#f0ad6d;">3</span>,<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">66</span>,<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">10</span>,<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">58</span>,<span style=" color:#646482;"> </span><span style=" color:#cfbfad;">-</span><span style=" color:#f0ad6d;">14</span>,<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">18</span>),</pre>
<pre>(<span style=" color:#f0ad6d;">0</span>,<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">93</span>,<span style=" color:#646482;"> </span><span style=" color:#cfbfad;">-</span><span style=" color:#f0ad6d;">32</span>,<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">27</span>,<span style=" color:#646482;"> </span><span style=" color:#cfbfad;">-</span><span style=" color:#f0ad6d;">16</span>,<span style=" color:#646482;"> </span><span style=" color:#cfbfad;">-</span><span style=" color:#f0ad6d;">60</span>),</pre>
<pre>(<span style=" color:#f0ad6d;">17</span>,<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">91</span>,<span style=" color:#646482;"> </span><span style=" color:#cfbfad;">-</span><span style=" color:#f0ad6d;">10</span>,<span style=" color:#646482;"> </span><span style=" color:#cfbfad;">-</span><span style=" color:#f0ad6d;">27</span>,<span style=" color:#646482;"> </span><span style=" color:#cfbfad;">-</span><span style=" color:#f0ad6d;">10</span>,<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">21</span>)]<span style=" color:#646482;">   </span><span style=" color:#cd8b00;">#阈值调试可以在IDE上看哦</span></pre>
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<pre><span style=" color:#808bed;">while</span><span style=" color:#646482;"> </span><span style=" color:#ff8bff;">True</span>:</pre>
<pre><span style=" color:#646482;">    </span>img<span style=" color:#cfbfad;">=</span><span style=" color:#808bed;">sensor</span>.<span style=" color:#ff8bff;">snapshot</span>()</pre>
<pre><span style=" color:#646482;">    </span>blobs<span style=" color:#646482;"> </span><span style=" color:#cfbfad;">=</span><span style=" color:#646482;"> </span>img.<span style=" color:#ff8bff;">find_blobs</span>([rgb_thresholds[<span style=" color:#f0ad6d;">0</span>],rgb_thresholds[<span style=" color:#f0ad6d;">1</span>],rgb_thresholds[<span style=" color:#f0ad6d;">2</span>]],<span style=" color:#e76000;">area_threshold</span><span style=" color:#646482;"> </span>=<span style=" color:#646482;"> </span><span style=" color:#f0ad6d;">3000</span>)</pre>
<pre><span style=" color:#646482;">    </span><span style=" color:#808bed;">if</span><span style=" color:#646482;"> </span>blobs:</pre>
<pre><span style=" color:#646482;">        </span><span style=" color:#808bed;">for</span><span style=" color:#646482;"> </span>b<span style=" color:#646482;"> </span><span style=" color:#808bed;">in</span><span style=" color:#646482;"> </span>blobs:</pre>
<pre><span style=" color:#646482;">            </span>tmp<span style=" color:#cfbfad;">=</span>img.<span style=" color:#ff8bff;">draw_rectangle</span>(b[<span style=" color:#f0ad6d;">0</span>:<span style=" color:#f0ad6d;">4</span>])<span style=" color:#646482;">  </span><span style=" color:#cd8b00;">#在图像上绘制一个矩形。</span></pre>
<pre><span style=" color:#646482;">            </span>tmp<span style=" color:#cfbfad;">=</span>img.<span style=" color:#ff8bff;">draw_cross</span>(b[<span style=" color:#f0ad6d;">5</span>],<span style=" color:#646482;"> </span>b[<span style=" color:#f0ad6d;">6</span>])<span style=" color:#646482;">  </span><span style=" color:#cd8b00;">#画十字交叉</span></pre>
<pre><span style=" color:#646482;">            </span>c<span style=" color:#cfbfad;">=</span>img.<span style=" color:#ff8bff;">get_pixel</span>(b[<span style=" color:#f0ad6d;">5</span>],<span style=" color:#646482;"> </span>b[<span style=" color:#f0ad6d;">6</span>])<span style=" color:#cd8b00;">#</span><span style=" color:#646482;">    </span><span style=" color:#cd8b00;">返回(x,</span><span style=" color:#646482;"> </span><span style=" color:#cd8b00;">y)位置的RGB888像素元组</span></pre>
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<pre><span style=" color:#646482;">    </span><span style=" color:#808bed;">lcd</span>.<span style=" color:#ff8bff;">display</span>(img)</pre>
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