Classes of Digital image processing operations Flashcards
What are the five main classes of digital image processing?
Image enhancement
Image restoration
Image analysis
Image compression
Image synthesis
What are some common operations used in image enhancement?
Contrast enhancement
Edge enhancement
Spatial and frequency filtering
Image combining
Noise reduction
What is the purpose of image restoration?
to improve the quality of images that have distortions or degradations, such as blurring, by making them sharper and isolating objects of interest.
What is the purpose of image enhancement?
The purpose of image enhancement is to improve image quality by manipulating certain features to make the image more suitable and appealing to the observer.
What is image analysis, and what is its primary goal?
the process of analyzing objects in an image.
What is the primary goal of image analysis?
Its primary goal is to isolate and highlight objects of interest by extracting features, resulting in object outlines and measures that characterize the objects.
What are some applications of image segmentation in image analysis?
3D images
Projection images
Multiplanar reformation images
Surface shaded display images
Volume-rendered images
Virtual reality images
What is multiplanar reformation (MPR) in image analysis?
converting imaging data from one plane (e.g., axial) into another plane (e.g., coronal, sagittal, or oblique).
What is volume rendering in image analysis?
Volume rendering is a data visualization technique that creates a 3D representation of data, commonly used in CT and MRI imaging.
What are the three forms of image compression?
Lossless compression (no loss of information)
Lossy compression (some loss of image detail)
Wavelet compression (no loss of image detail)
What is the difference between lossy and lossless compression?
Lossless compression retains all original image information when decompressed, while lossy compression loses some image detail during decompression.
What is image synthesis?
Image synthesis involves creating images from other images or non-image data, often used when it is physically impossible or impractical to form the desired image directly.
What are examples of image synthesis applications?
Examples include image reconstruction in CT and MRI, as well as 3D visualization techniques based on computer graphics technology.
What is a scan projection radiograph in image analysis?
A scan projection radiograph, also known as a “scout” view, is a preliminary image used in computed tomography (CT) to guide the scanning process.
What is a shaded surface display (SSD) in image analysis?
A shaded surface display is a surface-rendered image that provides a realistic 3D view of the surface of a structure within the acquired volume data set.
