Digital Imaging Problems - Digital Photo Problems
Although noise is one of the most annoying digital imaging problems, it is not the only one. Additional problems
related to colour, contrast, detail and sharpness may also be experienced.
Colour balance can be adjusted on digital cameras but in order to do that, they need a reference point which is
where the white balance control comes in to play. Using white as a reference point, the camera should be able to
faithfully reproduce all of the other colours
White balance is an adjustment that most cameras can be set to carry out automatically although there is
normally an option where the automatic setting can be turned off and the adjustment carried out manually. This is
particularly useful in less than favourable light situations. Extreme adjustments of the white balance can also be
used to artistic effect
Most of the time, however, precise colour reproduction is desired. Imprecise colours can be compensated for with
imaging software, but it is always good practice to capture the best colours at source.
In practice, it is always best to capture the best possible image when taking the photograph rather than rely on
software to correct any imperfections afterwards. Ensuring that the correct exposure time is selected when taking
the photograph will save a lot of time trying to make adjustments later on with software. However, if all else
fails, then software adjustment is the only way to go.
Digital Camera Lenses
Of all the imaging problems, those caused by poor quality lenses can be the most difficult to rectify. If the
camera has a bad lens then the resulting images will also be poor quality. It is therefore essential to select a
digital camera with the best quality lens you can afford.
That said, even some of the best quality lenses can produce distortion at their extreme focal lengths. As this
type of distortion will most likely be inaccurate horizontals and verticals, it is reasonably easy to correct.
Imaging software can be used to make amends for small variations in straight lines, and the slight irregularity in
these situations are at times not at all objectionable.
It is practically impossible, though, to clear up a blurry image caused by a cheap plastic lens. If image
quality is critical to you, be sure to get good-quality glass lenses and keep them well maintained. Dirt and dust
on lenses can cause distortion and noise in the final image, so maintain them as clean as possible without
excessive handling. A soft brush and a blower should be all that is required if the lenses are kept covered when
not in use.
At the end of the day, most of the imaging problems mentioned above can be cured with the use of professional
imaging software such as Photoshop. Corrections can be made to colour irregularities, white balance, lens
distortion, incorrect exposure, and blurring. Although Photoshop has a steep learning curve, many of the selfsame
functions are available in other software packages which are easier to use and less costly.
Digital photographs, after all, are computer data which can be manipulated down to the bit level, so it is
always possible to change the smallest detail of any image. Software can automate many of these corrective
functions, and manual manipulation is also possible to improve any digital image.