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                                                                                                                                                              您的位置>首頁>新聞動態> 永輝智造帶您了解產品邊緣輪廓在線檢測系統

                                                                                                                                                              發布時間: 2021-08-17    瀏覽量:472
                                                                                                                                                              邊緣輪廓檢測,機器視覺

                                                                                                                                                                邊緣是圖像局部亮度變化更重要的部分。邊緣主要位于目標和目標、目標和背景、區域和區域之間,是圖像分割、紋理特征提取和形狀特征提取和圖像分析的基礎。產品邊緣輪廓檢測是機器視覺中不可缺少的一部分,是重要的圖像預處理技術。產品邊緣輪廓在線檢測系統圖像分析和理解的第一階段往往是邊緣檢測,在圖像處理和計算機視覺中占據特殊位置,是基本處理中更重要的部分之一,經常檢測邊緣的圖像可以進行特征提取和形狀分析。

                                                                                                                                                                邊緣的形成是因為物體的材質不同或表面的方向不同,所以圖像的邊緣會發生著色、顏色和紋理的變化。因此,相反,可以檢查圖像中其他灰度、顏色等特性區域的邊界,以獲得邊緣。邊緣輪廓是人類識別物體形狀的重要因素,也是圖像處理中的重要處理對象。邊緣檢測主要使用多種算法來查找和增強圖像中可能有邊緣的像素點。

                                                                                                                                                                因為邊緣是灰度值不連續的結果,所以這種不連續往往可以利用求出導數的方便檢測,一般選擇一階和二階導數來檢測邊緣。機器視覺檢查中,產品邊緣輪廓檢測可以通過空域微分算子通過卷積進行。實際上,在數字圖像處理中求得導數是利用差分近似微分進行的。常用的微分算子是梯度算子和拉普拉斯算子。

                                                                                                                                                              輪廓邊緣檢測示意圖

                                                                                                                                                                產品邊緣輪廓在線檢測系統算法的基本步驟如下。

                                                                                                                                                                1、濾波器:邊緣檢測算法主要基于圖像強度的第一階和第二階導數,但導數計算對噪音敏感,因此需要使用濾波器來提高與噪音相關的邊緣探測器的性能。

                                                                                                                                                                2、增強的:增強邊緣的基礎是確定圖像各點鄰居強度的變化值。增強算法強調相鄰(或局部)強度值發生重大變化的點。

                                                                                                                                                                3、在檢測3360圖像中,很多點的漸變振幅比較大,這些點在特定應用領域都不是邊緣,因此要用什么方法來確定哪些點是邊緣點。經常使用漸變幅度Ill值標準。

                                                                                                                                                                4、如果需要在定位3360應用程序中確定邊緣位置,則可以推測邊緣的位置為子像素分辨率,還可以推測邊緣的方向。

                                                                                                                                                                這四個階段是用機器視覺測量尺寸時必不可少的。特別是要指向邊的確切位置和方向。機器視覺檢查技術具有強大的性能優勢,能夠標準化產品質量,提高測試速度,測試結果可靠性,可靠性,長期測試,廣泛應用于各個領域。

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