The development of technology and information is currently very fast. One of the fields of technology and information that is experiencing development is the field of digital image processing. There are many technologies today that utilize digital images such as facial recognition, object detection and many others. Skin is one of the largest components of the human body. Currently, technology in the identification of skin color is widely used in recognizing the human race. In this study, skin color detection uses the YCbCr color space, which in this study only uses the range of Cb and Cr values, and ignores the Y value. Where Y is the lighting in the image. So if not changed, the image will contain light effects that can change the characteristics of skin color. However, problems were found because the detected images were not segmented properly, such as clothes and hair from the tested images were still detected as skin. Therefore, the HCbCr color space method is proposed where the Hue value will represent the color of visible light. While the Otsu Thresholding method will separate the background from the object in the digital image.
Perguruan tinggi merupakan instansi pendidikan yang tidak lepas dari aktivitas pelayanan mahasiswa, khususnya pelayanan surat mahasiswa. Saat ini aktivitas pelayanan surat mahasiswa di Politeknik TEDC Bandung, masih menggunakan metode konvensional. Mahasiswa yang ingin membuat pengajuan surat tertentu, harus kerap kali mengisi data pada formulir kertas untuk membuat pengajuan surat. Permasalahan yang terjadi adalah data tidak terorganisir dengan baik, banyaknya kertas yang harus di cetak untuk formulir pelayanan berbagai macam surat dan juga petugas pelayanan masih harus memasukkan data pada formulir ke dalam surat yang di ajukan oleh mahasiswa secara manual. Berdasarkan masalah tersebut, perlu dibuat sistem administrasi pelayanan surat mahasiswa untuk mengelola berbagai pengajuan surat mahasiswa. Metode yang digunakan pada penelitian ini adalah waterfall. Perancangan database menggunakan MySQL dan bahasa pemrograman yang digunakan adalah PHP dan Java. Hasil penelitian ini adalah adanya sistem administrasi yang mampu mengelola data pengajuan surat mahasiswa, mulai dari pengajuan, surat diproses, hingga pemberian notifikasi kepada mahasiswa bahwa surat telah selesai diproses. Dari hasil pengujiannya, 82,8 % responden setuju bahwa sistem mampu melakukan pengelolaan pengajuan surat mahasiswa.
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