Camera Parameters - Part 1
Please Note: This blog post is part of a series of five posts altogether.
The posts include: Part 1, Part 2, Part 3, Part 4 and Part 5.
Introduction
The quality of an image is determined by many things: Illumination, lens and camera parameters. In the following text, we are going to take a look at how to set camera parameters for optimal image quality.
Shutter (Exposure Time)
The shutter determines the CCD‘s exposure time. It may be adjusted manually or automatically. The three first sample images show a key ring (the LED is initially off) with correct exposure time, one which is too short and another which is too long:
Switching on the LED, the image is overexposed in such a way that it only shows a big, white spot. The LED is correctly represented, if we decrease the exposure time. There is, however, a vertical line which disturbs the image. This is a typical CCD problem and is known as “smear”. To avoid this, we close the diaphragm and increase the exposure time:
(To be continued…)
Camera Parameters - Part 2 / Machine Vision Blog by The Imaging Source said,
July 17, 2008 @ 09:50
[...] Note: This blog post is part of a series of five posts altogether. The posts include: Part 1, Part 2, Part 3, Part 4 and Part [...]
Camera Parameters - Part 4 / Machine Vision Blog by The Imaging Source said,
July 17, 2008 @ 09:50
[...] Note: This blog post is part of a series of five posts altogether. The posts include: Part 1, Part 2, Part 3, Part 4 and Part [...]
Camara Parameters - Part 5 / Machine Vision Blog by The Imaging Source said,
July 18, 2008 @ 06:46
[...] Note: This blog post is part of a series of five posts altogether. The posts include: Part 1, Part 2, Part 3, Part 4 and Part [...]
rob said,
July 19, 2008 @ 14:39
Excellent examples and valuable info! A must-see for any digital imaging beginners.
Keep up the good job!
Xiao said,
July 22, 2008 @ 07:45
Hi Rob,
Thanks for your kind comment! I am glad that we could provide you with some useful information!
Xiao