Memory

12.1 Color Physical aspects of color Visible light : part of electromagnetic spectrum (energy takes form of waves of varying wavelength) Perceptual aspects of color Color = being made up of varying amonts of primary colors (red, green, blue) Color matching functions (CIE) Y component : luminance or perceived brightness of color → Sum = 1, symmetric about middle of visible spectrum 12.2 Color mod..

11.2 Basic ideas Morphology (형태) : a branch of image processing which is useful for analysis shapes in (binary) images 1) Translation A : a set of pixels in a binary img w = (x, y) : a particular coordinate point A_w = { (a, b) + (x, y) : (a, b) ∈ A} : a set A 'translated' in direction (x, y) (Matrix coordinate : The origin is at the top left → x goes down, y goes across) 2) Reflection A^ = { (-..

10.1 The Hough transform Goal : To find lines in imgs (1) Basic approach Suppose a point (x, y) → Consider all pairs (a,b) which satisfy y = ax+b → Plot them into 'accummulator array' The dots in transform : places where there are maximum intersections of lines : at each dot three lines intersect The coordinates of dots : (a, b) = (1,0) and (1, -1) The lines : y = 1*x + 0 and y = 1*x + (-1) ⇔ Th..

9.1 Introduction Fourier Transform - A powerful alternative to linear spatial filtering ; more efficient than using a spatial filter for a large filter - Isolating and processing particular img 'frequencies' → Performing low/high-pass filtering with a great precision 9.2 The one-dimensional Discrete Fourier Transform 1) Approximation of the periodic function (1) Periodic function - Written as th..

1. Retrieval Information Retrieval via AE AE : Good at 'Data Dimension Reduction' (= Feature 잘 뽑음) 2. Generation 1) Gray Face / Handwritten Digits (1) Gray Face Generation VAE : Normal distribution (Prior) 공간 내에서 Sampling 하고 Generator에 입력하면 z값에 따라 다양한 이미지 생성 가능 z를 29 Dimension으로 압축했으며, 각 element 별로 주요한 feature들이 저절로 뽑히게 됨 (Vanilla VAE에서는 z의 각 element가 어떤 feature를 의미하는지 모름) (2) Handwritten Digits..

8.1 Introduction 1) Edge : a line of pixels showing an observable difference - human eye can pick out grey differences of the magnitude with relative ease 2) When Edge used to measure the size of objects to isolate particular objects from their background to recognize or classify objects 3) MATLAB function - parameters : depend on the method used *edge function : taking care of all the filtering..

7.1 Introduction Noise : degradation in img signal, caused by external disturbance Depending on Type of disturbance → Type of errors on output img → Type of noise on img → Choose appropriate method(Image Restoration) for reducing each type of noise ! 7.2 Types of noise 1) Salt and pepper noise (1) Salt and pepper noise = Impulse noise, shot noise, binary noise - caused by sharped, sudden disturb..

1. Cloud Computing 1) 클라우드 컴퓨팅 (1) 정의 - 컴퓨터의 각종 연산 및 처리를 개인 PC가 아닌 인터넷 공간(클라우드)에서 처리하는 방식 - 인터넷(클라우드)을 통해 Server, Storage, DB, Networking, SW, Analysis, Intelligence 등의 서비스 제공 - 즉, 인터넷(클라우드)을 통해 컴퓨터의 자원을 제공 (2) 등장 배경 - 과거 : 주로 서버를 직접 소유해 서버 관리에 대한 직접 권한을 갖고 서버의 모든 자원을 활용하며 독립적 사용 서버(Server) : 클라이언트에게 네트워크를 통해 정보나 서비스를 제공하는 컴퓨터 시스템. 프로그램 또는 장치 - 대규모의 컴퓨팅 파워가 필요하다면, 집에 엄청 큰 서버를 들여야 하는걸까? (효율성, 확장성..