Exam 2: Digital Imaging Processing Concepts

The digital image processing technique known as ____________________ is also intended to change the contrast and brightness of an image.

A(n) ____________________ is a graph of the number of pixels in the entire image or part of the image having the same gray levels (density values) plotted as a function of the gray levels.

One popular ____________________ operation is to use the FT in filtering images in the frequency domain rather than in the spatial location domain.

The classical sine wave is a continuous function that can be converted into a discrete function, both of which will generate two categories of images, namely, analog and ____________________ images.

There are several operations used in digital image processing to transform an output image into an input image to suit the needs of the human observer.

A ____ histogram implies more contrast and a ____ histogram will show less contrast.

Since digital radiographic detectors have wide exposure latitude and a linear response, an image displayed without processing might appear as a ____.

What is the first step in digitizing an image in which the image is first divided into an array of pixels?

The purpose of the ____ class of processing is to generate an image that is more pleasing to the observer.

A digital image can be described with respect to several characteristics or fundamental parameters, including the matrix, pixels, voxels, and the bit depth.

The number of bits per pixel is the ____________________.

Which of the following is intended to reduce noise and the displayed brightness levels of pixels?

The pixels that make up the matrix are generally ____.

A digital image is made up of a 2D array of numbers called a(n) ____________________.

Digital image processing has become rare in digital radiology departments and is now part of the specialized skills of technologists and radiologists.

Both past and current day processing technologies include a wide range of image processing algorithms for use in digital radiology.

The third step in digitizing an image is ____________________.

Digital imaging modalities such as CT, MRI, diagnostic ultrasound, and nuclear medicine incorporate digital image processing as an essential tool to manipulate and enhance ___________________.

The purpose of ____________________ of digital images is to reduce the size of the image in order to decrease transmission time and reduce storage space.

Which of the following is now a routine activity in digital medical imaging, and also an essential tool in the PACS environment?