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[[en:processing:найти_структурный_элемент]]

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en:processing:найти_структурный_элемент [2012/03/14 15:19]
127.0.0.1 external edit
en:processing:найти_структурный_элемент [2012/04/18 22:26]
Анастасия Большакова
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 The function detaches structure elements by determination of local maximums of [[взаимная_корреляция|cross correlation]] between two images. The points of the maximums are marked with red dots on the initial image and our intention here is to achieve the correct determination of all the maximums by adjusting the parameters of the function. The rigidity in maximums picking may be different, it is defined by **Level** parameter. this parameter varies between 0 and 1, 0 corresponds to the most strict picking of maximums and often gives a good result. Normally the best result may be achieved with small values of this parameter. Select a string with the **Level** parameter and find the optimal value by clicking arrows near it. The function detaches structure elements by determination of local maximums of [[взаимная_корреляция|cross correlation]] between two images. The points of the maximums are marked with red dots on the initial image and our intention here is to achieve the correct determination of all the maximums by adjusting the parameters of the function. The rigidity in maximums picking may be different, it is defined by **Level** parameter. this parameter varies between 0 and 1, 0 corresponds to the most strict picking of maximums and often gives a good result. Normally the best result may be achieved with small values of this parameter. Select a string with the **Level** parameter and find the optimal value by clicking arrows near it.
  
-{{en:​processing:​find_structure_element_3_en.jpg|Calling a function from the menu}} ​  ​{{en:​processing:​find_structure_element_4_en.jpg|The parameters window}}+{{:en:​processing:​find_structure_element_3_en.jpg|Calling a function from the menu}} {{:en:​processing:​find_structure_element_4_en.jpg|The parameters window}} ​
  
 The size of the area in which maximums are searched may coincide with the size of structure element image used for correlation,​ in this case the value of **Locality** parameter mast be set to **Structure element**. It is reasonable if you have selected one or few unit cells for cross correlation. If you have isolated an area consisting of several unit cells, then select ** Neighborhood ** and specify the size of the neighborhood in nanometers. The size of the area in which maximums are searched may coincide with the size of structure element image used for correlation,​ in this case the value of **Locality** parameter mast be set to **Structure element**. It is reasonable if you have selected one or few unit cells for cross correlation. If you have isolated an area consisting of several unit cells, then select ** Neighborhood ** and specify the size of the neighborhood in nanometers.
 After selecting the two options described above, some of the centers of elementary cells may be identified twice by mistake: After selecting the two options described above, some of the centers of elementary cells may be identified twice by mistake:
  
-{{en:​processing:​find_structure_element_2_en.jpg|Incorrect identification of the centers of elementary cells}}+{{:​processing:​find_structure_element_2_en.jpg|Incorrect identification of the centers of elementary cells}}
  
 In this case set the value ** Yes ** to the parameter ** Dilate intermediate results ** to merge closely located maximums. The radius of merging is defined by **Radius, nm** parameter. In this case set the value ** Yes ** to the parameter ** Dilate intermediate results ** to merge closely located maximums. The radius of merging is defined by **Radius, nm** parameter.