Sistem Pengukuran Berbasis Penggabungan Fitur Spektral dan Spasial menggunakan Convolutional neural network: Studi Kasus Pengenalan Kadar Lemak, Laktosa, dan Protein Susu = Measurement System of Fat, Lactose, and Protein Content in Milk Using Spatial and Spectral Features Based on Convolutional Neural Network (CNN)