Indonesian citizens who use motorized vehicles are increasing every year. Every motorcyclist in Indonesia must wear a helmet when riding a motorcycle. Even though there are rules that require motorbike riders to wear helmets, there are still many motorists who disobey the rules. To overcome this, police officers have carried out various operations (such as traffic operation, warning, etc.). This is not effective because of the number of police officers available, and the probability of police officers make a mistake when detecting violations that might be caused due to fatigue. This study asks the system to detect motorcyclists who do not wear helmets through a surveillance camera. Referring to this reason, the Circular Hough Transform (CHT), Histogram of Oriented Gradient (HOG), and K-Nearest Neighbor (KNN) are used. Testing was done by using images taken from surveillance cameras divided into 200 training data and 40 testing data obtained an accuracy rate of 82.5%.
Keamanan informasi dapat berupa menyembunyikan atau mengubah informasi. Dalam penelitian ini diterapkan cara mengamankan informasi dengan menyembunyikan informasi kedalam sebuah wadah seperti image, vidio dan audio, Teknik ini disebut Steganografi. Pada steganografi terdapat banyak metode yang dapat digunakan, kali ini Peneliti menggunakan metode Bit Plane Complexity Segmentation (BPCS). Pada metode BPCS informasi atau pesan disisipkan pada daerah bit plane yang mengandung noise. Metode ini memanfaatkan pengelihatan manusia yang tidak dapat melihat perubahan biner pada gambar. Pada penelitian ini Cover image yang digunakan adalah citra dengan format JPG, PNG, dan BMP. Sedangkan pesan yang disimpan kedalam citra berupa file dengan format .txt dan .docx. Proses pengujian dilakukan dengan menyisipkan file kedalam beberapa Cover image menggunakan aplikasi yang telah dibangun. Hasil pengujian menghasilkan stego image dengan nilai rata-rata PSNR antara 22 - 25 dB. Sedangkan rata-rata penyisipan pesan sebesar 40%. Penerapan teknik steganografi bermanfaat untuk menyembunyikan pesan dalam suatu media tanpa terdeteksi oleh pengelihatan manusia secara kasat mata.
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