The invention discloses a chemical identification method of age for trees with unclear growth rings and relates to the technical field of forestry. The method herein comprises the steps of selecting atree sample under test, grinding with abrasive paper, brushing the surface of the tree sample with alcohol, and brushing the surface of the tree sample with sodium hydroxide solution to obtain a pretreated sample; brushing the surface of the pretreated sample with ferric trichloride solution or copper sulfate solution so that black occurs near the growth rings on the surface of the pretreated sample, while the growth rings are clear. The method herein allows the age of a tree to be identified more visually, quickly and accurately.

Chemical identification method of age for trees with unclear growth rings

The present invention relates to a tree-ring image edge extraction and segmentation system, belongs to the field of electronic information, and in particular relates to a method for performing edge extraction and segmentation on tree-ring images. By virtue of a computer image processing technology, a tree-ring extraction and segmentation system is developed. The functions of the system are divided into three parts, wherein the first part is image preprocessing and comprises image conversion, smooth noise reduction and gray variation; the second part is ring extraction and segmentation; and the third part is analysis result storage. The system is used for performing digital processing on the tree-ring images to ensure that rings on the processed images can be identified by human eyes and the data volume to be processed in an image identification stage is greatly reduced, and the tree-ring images can be directly quoted by a tree-ring analysis system WINDENDRO.

Li Hongyan

Papers

Tree-ring image edge extraction and segmentation system