A prospective, controlled trial of eight-bit, 16-bit, and 24-bit digital color images in electronic endoscopy

Endoscopy
N Vakil, K Bourgeois

Abstract

Digital color information is obtained in "bits" or parcels of information for each color (red, green, blue) of a picture. As the number of bits increases, the amount of color information increases, and more colors can be displayed on a suitable monitor. With eight bits of information, 256 colors can be displayed; with 16 bits, several thousand colors can be displayed; and with 24 bits, more than 16 million colors can be displayed. We sought to determine the minimum requirement for diagnostic-quality endoscopy images in a prospective blinded trial. Twenty-four bit color images were digitally acquired from the processor using a video card and a personal computer. Ten lesions were chosen to represent the gamut of lesions seen in the upper gastrointestinal tract. Images were simultaneously obtained with decreasing color information (16 and eight bits), and these served as controls. Eleven observers were the test subjects. Six endoscopy nurses, who perform color calibrations, and five endoscopists viewed the images. Eight-bit, 16-bit and 24-bit color images were coded and displayed simultaneously on a high-resolution color monitor (Supermac Technology, Sunnyvale, CA) that can display 16.8 million colors. All images were considered t...Continue Reading

Citations

Feb 23, 2002·Current Opinion in Urology·Andrew TroyDavid Tolley
Mar 24, 1998·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·R B Trelease
Mar 12, 2002·The Journal of Craniofacial Surgery·Reza JarrahyHrayr K Shahinian

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