Edgeworks

Works to bring out the edges in a picture.

Edgeworks is a filter to create lines. OK, it just takes the current picture and then takes the difference and then adds the original back in - in varying degrees of intensity. The effect is to create lines or edges. The filters offers the options to modify how the line is worked out, how the line and the parts not related to the line are generated. The filter also offers an option to change the direction of the 'light' is applied.

Please note that some of the controls have multiple purposes - the prime purpose is indicated. Also note that some of the controls will have no effect such as the X and Y if the (*) has not been set to on. Some of the options in the dropdowns use the X Y, or if no inverse option is set then the () will be ignored. Also note that the preview might not match the end result - especially if the setting is at less than 25% or so - to get a 99% accurate view of the end result please set the preview to 100%.

X - x coordinate. This is generally used by the spotlight (*). The spotlight applies the (*) factor to the current effect. By setting it to 0,0 the effect will be strongest in the top left corner - as you move the settings the spotlight will change position. Once the spotlight is past the edge of the picture the spotlight will just get brighter and brighter until it either obliterates the picture or completely darkens the picture (in most cases).

Y - y coordinate

Combo 1 - Coordinate mode - XY, radial etc.

Combo 2 - Line style such as lines made up of little squares

Combo 3 - Red line - colour mode for the red channel lines

Combo 4 - Red background - colour mode for the non line red channel

Combo 5 - Green line - colour mode for the green channel lines

Combo 6 - Green background - colour mode for the non line green channel

Combo 7 - Blue line - colour mode for the blue channel lines

Combo 8 - Blue background - colour mode for the non line blue channel

Combo 9 - Direction of the 'Light'

Mix - Mix image with effect for red channel

Mix G - Mix green channel

Mix B - Mix Blue channel

(R) - Red channel inverse

(G) - Green channel inverse

(B) - Blue channel inverse

(*) - Spotlight effect - requires first checkbox to be on - if second checkbox is on the reverse effect is applied

R<> - Red threshold on line/non-line (background)

Red Checkbox - apply red channel (can still be affected by line setting)

G<> - Green threshold on line/non-line

Green checkbox - apply green channel (can still be affected by line setting)

B<> - Blue Threshold on line/non-line

Blue checkbox - apply blue channel (can still be affected by line setting)

f1 - general modification effect (used in emboss, etc.)

f1 first checkbox - mix line

f1 second checkbox - mix non-line

f2 - general modification effect 2