A Project Plan On Image Quality Essay

DIGITAL IMAGES are electronic snapshots taken of a scene or scanned from documents, such as photographs, manuscripts, printed texts, and artwork. The digital image is sampled and mapped as a grid of dots or picture elements (pixels). Each pixel is assigned a total value (black, white, shades of gray or color), which is represented in binary code (zeros and ones). The binary digits ("bits") for each pixel are stored in a sequence by a computer and often reduced to a mathematical analog version for display or printing. http://preservationtutorial.library.cornell.edu/intro/intro-01.html

Q. 4 Identify and explain the three factors that influence the quality of digital video

In this report, I will talk about my understanding of the impact in various file format, the different compression techniques, and different resolutions and different colour depth. I will show print screens of different types of compression techniques, megapixels under image quality & resolution and three different types of colour depths. I will explain the reasons why some are larger compared to others. The format includes PSD, JPEG, TIFF, BMP and GIF. I will also go into detail why colour depths will affect the quality of the final output that the file has created.

Frigaard, C., Gade, J.T., Hemmingsen., Sand, T.:Image compression based on a fractal theory. In: Institute for Electronic Systems, Aalborg University (1994)

clarity that are almost perfect photographic quality and also to maintain the image for as long as

All things detrimental to our health should carry warning labels, including pictures. Media images manipulated with photoshop are permitted to create the ideal person by setting unattainable goals which leads to the debate of, should photoshopped images be marked with a label? This controversy is causing impossible standards of beauty to be set because people do not realize they are being manipulated by digitally altered images in the media. Companies obviously want to make their products as appealing as they possibly can by retouching ads and pictures but this leads to unreal expectations. Individuals already greatly influenced by society, start to develop unhealthy eating patterns, esteem issues, and false hopes.

An image may be a two dimensional plane which consists of f(x, y) where x, y are the coordinates in the plane and f is the amplitude or the intensity of the image at that particular point in the plane. If x,y are positive and “f” is a finite discrete value, then the image is the digital image. All the elements of an image are referred to as pixels.

Competencies Required for the Practice of Diagnostic Imaging General is a document produced by the Medical Radiation Technologists Board. It outlines the competencies and skills that are required for a Medical Imaging Technologist to practice in New Zealand in a safe, professional, patient, and focused manner (MRTB, 2011).One of these requirements is being able to evaluate images and decide whether they are diagnostic and contain any pathologies. This is stated in skill 7.5 Process and evaluate image. Medical Imaging Technologists are the first medical professionals to review each image as they are taken. Therefore their role is very valuable and they are able to pass on important and potentially life threating pathologies about the patient that may affect the patient’s outcome and treatment plan. Currently in New Zealand Medical Imaging Technologists do not formally report images as this is not part of their working requirements. In the United Kingdom however there is a shift to some preliminary image reporting being carried out by Medical Imaging Technologists who have qualifications to do so.

Images contain arguments, whether if there are many or just a few. A series of images with no words but contains an argument is a pictorial essay. John Berger's Ways of Seeing (1972) contains both word and pictorial essays. The book is divided into seven sections, three being pictorials. In the very first chapter of the book, Berger made it clear that "the way one image follows another, their succession, constructs an argument which becomes irreversible." Having noted that, it would seem that the sixth essay argues that an observation painting provides more information than that of a directed or arranged portrait.

Image compression may be lossy or lossless. Lossless compression is preferred for archival purposes and often for medical imaging, technical drawings, clip art, or comics. Lossy compression methods, especially when used at low bit rates, introduce compression artifacts. Lossy methods are especially suitable for natural images such as photographs in applications.

After acquiring the image various preprocessing methods can be apply. The aim of this step is to improve the quality of the image that suppress unwanted distortion and enhance the image features which is important for further processing. Such as increase or decrease brightness, shape, contrast, remove the noise from the image.

Seen as there are numerous different uses for images it means that the quality will differ for different purposes. The formats which I will be discussing within this report include JPEG, GIF’s, TIF, PSD and BMP. All these formats are made for different reasons and I will be explaining these differences in quality and file size. Each format varies in the depth of the colour within the image, some have larger colour depth meaning that the file size will be larger, whereas, some of these formats have very low colour depth resulting in a lower quality image. When exporting an image, sometimes there is an option to adjust the colour depth to your preference, so, the file format could change to your desired colour depth.

‘Visual culture’ contains many different media forms ranging from art works to popular film and advertising to visual data, Visual culture looks at how those images transmit messages within a culture (Sturken & Cartwright, 2005, P.1). Individual choice has a high value in the world of consumerism (Sturken & Cartwright, 2005, P.191). KENZO’s advertising use colours and display of the furniture to reflect people 's emotion to express their product design. This essay analyses this advertisement’s surreal image, layout and

Texture is also an important visual feature that refers to innate surface properties of an object and their relationship to the surrounding environment. Many objects in an image can be distinguished solely by their textures without any other information. In conventional texture features used for CBIR, there are statistic texture features using gray-level co-occurrence matrix (GLCM), Markov random field (MRF) model, simultaneous auto-regressive (SAR) model, Wold decomposition model, edge histogram descriptor (EHD), etc. Recently, BDIP (block difference of inverse probabilities)

Image steganography has gotten more popular press in recent years than other kinds of steganography, possibly because of the massive use of electronic image information available with the advent of digital cameras and high-speed Internet distribution. Image steganography often involves hiding information in the naturally occurring noise within the image and provides a good artwork for such techniques. Most kinds of information contain some kind of noise. Noise can be described as unwanted distortion of information within the signal. Within an audio signal, the concept of noise is obvious. For images, however, noise generally refers to the imperfections inherent in the process of rendering an analog picture as a digital image. For example, the values of colors in the palette for a digital image will not only be the exact colors in the real image and the distribution of these colors will be also be imperfect. The greater the number of bits used to