This is the third application
in the Photo Lith family.
This was developed to produce Black & White images from colour
digital files with similar controls to those used when taking traditional
Black & White pictures with a film camera.
The main screen of Photo Lith - Black & White 1.1
The first control in this application is Filter. This
is the equivalent of using a coloured filter in front of the camera
lens and alters the way different colours are recorded giving improved
contrast between colours that would ordinarily record as the same
shade of grey. A filter will lighten its own colour and darken opposite
colours, for example a Red filter will lighten skin tones and darken
the sky. This application gives you the opportunity to continuously
alter the colour and density of a filter giving you fine control
over how the image will look. A denser filter has a more pronounced
effect than a pale one.
The next set of controls allow control over the contrast
of the image as a whole and also of the highlight and shadow contrast
individually. Also in this set of controls are sliders that simulate
altering the camera or 'negative' exposure and the 'print' exposure.
Increasing the negative exposure or decreasing the print exposure
will lighten the image and doing the opposite will darken the image.
If you don't like the effect of your adjustments the Reset buttons
beside each slider will restore the default settings.
The final set of controls allows you to alter the
colour of the final image. With this option selected there are three
options. The first is Tone, this is the equivalent of printing onto
a coloured paper where the highlights show the strongest colour.
The second image is Tint, this leaves the highlights white while
the colour becomes progressively stronger towards the shadows. The
final option is Pure Tint, here the image is made up of only colour,
there is no black, the shadows are pure colour.
Examples of the Filters can be found here.