Assessment of Invasive and Weed Species by Hyperspectral Imagery in Agrocenoses Ecosystem
نویسندگان
چکیده
The present study aimed to investigate the possibility of using hyperspectral imaging data identify invasive and weed species in agrocenoses ecosystem. most common weeds grain agrocenoses, i.e., Ambrosia artemisiifolia L., Euphorbia seguieriana Neck., Atriplex tatarica Glycyrrhiza glabra Setaria pumila (Poir.) Roem. Schult, served as objects. population weeds, especially is for selected region study. Therefore, shooting objects was carried out with a camera, Cubert UHD185, values 100 spectral channels were obtained from images. 80 vegetation indices (VIs) calculated. material processed mathematical statistics (analysis variance, t-test) search methods analysis (principal component analysis, decision tree, random forest). Using statistical methods, simultaneous use several VIs differentiated between more deliberately precisely. combination Derivative index (D1), Chlorophyll content (Datt3), Pigment specific normalized difference (PSND) can be used identification. tree method, established good division into groups; (1) perennial rhizomatous (Euphorbia seguieriana, glabra), (2) annual (A. artemisiifolia, A. tatarica, S. pumila); These Vis are (CI), D1, Datt3. forest that have greatest impact on Mean Decrease Accuracy Gini Datt3, PSND, Double Peak Index (DPI). channel identification plant principal showed worse results than when VIs. A great similarity help analysis.
منابع مشابه
Hyperspectral characteristics of canopy components and structure for phenological assessment of an invasive weed.
Spectral reflectance values of four canopy components (stems, buds, opening flowers, and postflowers of yellow starthistle (Centaurea solstitialis)) were measured to describe their spectral characteristics. We then physically combined these canopy components to simulate the flowering stage indicated by accumulated flower ratios (AFR) 10%, 40%, 70%, and 90%, respectively. Spectral dissimilarity ...
متن کاملMapping Bush Encroaching Species by Seasonal Differences in Hyperspectral Imagery
Bush encroachment is a form of land degradation prominent worldwide, but particularly present in semi-arid areas. In this study, we mapped the spatial distribution of the two encroacher species, Acacia mellifera and Acacia reficiens, in Central Namibia, based on their different phenological behavior. We used constrained principal curves to extract a one dimensional gradient of phenological chan...
متن کاملassessment of deep word knowledge in elementary and advanced iranian efl learners: a comparison of selective and productive wat tasks
testing plays a vital role in any language teaching program. it allows teachers and stakeholders, including program administrators, parents, admissions officers and prospective employers to be assured that the learners are progressing according to an accepted standard (douglas, 2010). the problems currently facing language testers have both practical and theoretical implications but the first i...
Spectrally segmented principal component analysis of hyperspectral imagery for mapping invasive plant species
Principal component analysis (PCA) is one of the most commonly adopted feature reduction techniques in remote sensing image analysis. However, it may overlook subtle but useful information if directly applied to the analysis of hyperspectral data, especially for the discrimination among different vegetation types. In order to accurately map an invasive plant species (horse tamarind, Leucaena le...
متن کاملpatterns and variations in native and non-native interlanguage pragmatic rating: effects of rater training, intercultural proficiency, and self-assessment
although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Remote Sensing
سال: 2022
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs14102442