Title

Practical aspects of adjusting digital cameras

UMMS Affiliation

Department of Cell and Developmental Biology

Date

8-7-2013

Document Type

Article

Medical Subject Headings

Animals; Cells, Cultured; Humans; Image Processing, Computer-Assisted; Microscopy; Photography; *Software

Disciplines

Cell Biology | Investigative Techniques | Laboratory and Basic Science Research | Optics

Abstract

This chapter introduces the adjustment of digital camera settings using the tools found within image acquisition software and discusses measuring gray-level information such as (1) the histogram, (2) line scan, and (3) other strategies. The pixel values in an image can be measured within many image capture software programs in two ways. The first is a histogram of pixel gray values and the second is a line-scan plot across a selectable axis of the image. Understanding how to evaluate the information presented by these tools is critical to properly adjusting the camera to maximize the image contrast without losing grayscale information. This chapter discusses the 0-255 grayscale resolution of an 8-bit camera; however, the concepts are the same for cameras of any bit depth. This chapter also describes camera settings, such as exposure time, offset, and gain, and the steps for contrast stretching such as setting the exposure time, adjusting offset and gain, and camera versus image display controls.

Rights and Permissions

Citation: Nordberg JJ, Sluder G. Practical aspects of adjusting digital cameras. Methods Cell Biol. 2013;114:151-62. doi: 10.1016/B978-0-12-407761-4.00007-5. Link to article on publisher's site

Related Resources

Link to Article in PubMed