Mastering Digital Imaging

Digital Imaging: Understanding Brightness, Contrast Resolution, and Spatial Resolution

• The brightness of a digital image is termed luminance and is measured by a photometer.
• Glare and blurring caused by illuminance (reflected ambient light) can be reduced by tinting CRT monitors and using LED backlight systems in LCDs.
• Controls such as window level can be used to adjust the brightness of the image within the viewing software.
• Contrast resolution refers to the ability of the digital system to display subtle changes in the shade of gray.
• Contrast resolution is directly related to the bit depth of the pixels in the image.
• Digital systems are more sensitive to scatter, so control of scatter is critical for contrast resolution.
• Sufficient kVp is still required for appropriate penetration of the tissues to provide signal separation.
• Display resolution can be controlled by a technique called window width.
• Spatial resolution is the ability of the imaging system to demonstrate small details of an object.
• Phosphor layer thickness and pixel size determine resolution in PSP systems and AMFPI.
• Smaller pixels produce images with higher spatial resolution.
• The dynamic range of the image also affects spatial resolution by responding to varying levels of exposure.

Do you know what makes a digital image bright or how to adjust its contrast resolution? Test your knowledge on digital imaging with this quiz. Explore the concepts of brightness, contrast resolution, and spatial resolution, and learn how each affects the quality of digital images. Take the quiz to discover tips on how to control brightness and display resolution, and understand the factors that influence spatial resolution in different imaging systems. Sharpen your skills in digital imaging and become an expert in understanding brightness, contrast resolution, and spatial resolution