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Ekstraksi fitur, juga dikenal sebagai ekstraksi fitur, adalah proses mengubah data mentah menjadi representasi yang lebih ringkas dan berguna yang dapat digunakan untuk analisis atau pemodelan lebih lanjut. Ini dilakukan pada tahap preprocessing sebelum masuk ke tahap analisis atau pemodelan. Pewarnaan alami dari berbagai tanaman yang menghasilkan warna tanin setelah pencelupan dikumpulkan menjadi satu alur gradasi warna yang berkaitan dengan susunan derajat atau peningkatan, peralihan warna dari satu warna ke warna lain. Variasi dalam alur ini dipengaruhi oleh jenis tanaman, lama pencelupan, jenis fiksasi yang digunakan, jenis kain, dan lokasi tanaman yang dijadikan sampel.Metode ekstraksi fitur dengan Matriks Co-Occurrence Level Gray (GLCM) digunakan untuk mengidentifikasi gradasi warna yang dihasilkan oleh pewarnaan pada daun Ketapang. Proses ekstraksi fitur tekstur dari gambar tanaman Ketapang menggunakan matriks GLCM digunakan untuk menganalisis dan memahami pola warna alami tanaman Ketapang di berbagai lokasi geografis. Untuk menggambarkan dan mengukur pola warna alami tanaman Ketapang, Gray Level Co-occurrence Matrix (GLCM) adalah representasi statistik dari distribusi spasial intensitas piksel dalam citra, yang mengukur frekuensi kemunculan pasangan intensitas piksel yang berdekatan dan memberikan informasi tentang tekstur citra

Academic data increases every year in line with the increase of students. Abundant data store is alsoan abundance of information. Data mining technology is a tool for extracting information on largedatabases and has been widely used in many domains. Predicting student performance (study evaluation) isan activity to determine a future state based on existing data. Data in the field of academic research hasbeen done with various methods and algorithms, but the use of algorithm SLIQ (Supervised Learning InQuest) has not been done.SLIQ is an algorithm developed by the IBM's Quest project team in 1996 for mining large datasets.SLIQ algorithm classify and predict the students performance, beginning with the data cleaning, conductedelection training and testing data. By calculating gini index of each attribute and then selecting thesmallest gini index data table is split according to the criteria until find the same class. From the results ofthe calculation process can produce a set of rules that can be used to predict student performance.From the experiment it can be concluded that the algorithm SLIQ with decision tree technique canbe used as an alternative in designing a system datamining applications. Tests conducted system showedthat the constructed model can be used to predict the performance of new students. The resulting accuracyof the model system in fact has a lower score than the accuracy of other applications that are used as acomparison of Tanagra. Advantages of the proposed system is in its design does not need complexcalculations in obtaining the gini index attributes.

Remote sensing is the science and art of obtaining information about an object, area, or phenomenon through the analysis of data acquired by a device that is not in contact with the object, area, or phenomenon under investigations Remote sensing data is of such nature and volume as to require it to be compatible with processing and outputing by computers. They are the easiest, fastest, and most efficient way to produce images, extract data sets, and assist in decision making. One special function is to assist in manipulating other kinds of data about the spatial or locational aspects of areas in the world that are the subjects of interpretation and decision making. The bulk of the data in such systems have in common a geographical significance, that is, they are tied to definite locations on the Earth. In this sense, they are similar to or actually make up what has become a powerful tool in decision making and management. The Image-Based Information System (IBIS) was developed in 1975 at the Jet Propulsion Laboratory, and is designed to be a comprehensive geographic information system that performs operations on raster image, tabular, and graphics format data, using the Video Image Communication And Retrieval (VICAR) image processing system. This was accomplished by the creation of a new VICAR-based file format for tabulating raster format geographic information over multiple data planes.