© Jan Esmann and Power Retouch. All rights reserved.

Photoshop plug-ins for retouching

This plug-in draws all the golden divisions,
the golden spiral and the harmonious
divisions on your image. Apply it to an empty
layer and use it as an aid in composing and
cropping.
This is the Golden Section plugin’s control
panel. Click on the image for a larger view.
It works with the following image modes:
8 & 16 bit/channel: RGB, CMYK, Grayscale,
Duotone, Lab.

The best way to use the plugin is to create a transparent layer on the image you want to edit or crop.
In Photoshop you do this with Shift-Ctl-N. Its color should be None, which is transparent.
To get a resizable transparent golden section in Photoshop:
1. First create a new empty layer in Photoshop.
2. In the plugin draw the sections or divisions you want onto this transparent layer filling the entire
image.
3. apply.
4. In Photoshop, with the golden section layer still active, select 'Free Transform' from the menu 'Edit'
to resize the golden section and move it around the image.

One interesting consequence of this ratio is that if you have a rectangle where the sides have the golden ratio, then you can divide
the rectangle into a square and a rectangle, where the new rectangle also has the golden ratio between its sides. This can go on ad
infinitum and is known as
golden spiral sections
.

You can use this to construct an equiangular spiral, known as
the golden spiral,
where the size of the revolutions grow with the
golden ratio.

If you want a more dynamic composition than the simple golden sections, then you can construct
golden triangles
.
Below you will see an example of the harmonious triangles. If your image has the divine proportion, then the golden triangles and
the harmonious triangles will be identical.

Another harmonious division is the division of a rectangle into equiangular
harmonious triangles
based on the diagonal.
When the proportions of the rectangle are identical to the golden proportions, then the harmonious triangles will of course be
identical to the golden triangles.

So are the diagonals from the corners to the midponts of the oposing sides

Vermeer used the basic golden
sections to arrange the masses.

He used the golden triangles to
create a pyramid containing the
two persons, thus bringing them
into relationship

By constructing the focalpoint of
a golden spiral, he located the
main dynamic focus of the
composition: the girls hands and
the glass of wine.

In fact Vermeer subdivided
minutely and found the exact
space occupied by the glass and
the edges of the hands holding it.

Vermeer also used the
symmetrical focalpoint of the
rotated spiral.

It exactly locates the placement of
the open window with the faint
reflection of a woman outside.

Vermeer also divided the picture
into two halfs along the vertical
centre. He then divided each half
into the golden sections.

He did the same with the
horisontal halfs. The horisontal
middle is the mans eye-hight.
It is a well known compositional
principle that the horisontal
middle is to be avoided since it
creates a too rigid and obvious
division of the picture.

Of course there are other
compositional principles, that have
been in use for centuries.
Diagonals and diagonals to
midpoints are classics.