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Tutorial to generate a watermarked image


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Purpose

Rather than writing a traditional step by step tutorial like I did it for some other script-fu of mine, I think that it is more adequate to show many examples made with the script-fu Watermark-it. Thus you will see the influence of the settings on the result and you can easily find out what are the settings you need, to obtain the result you are awaiting.



Download

Link to the download page of the script 'Watermark it'. The script is available in english, french and german.



Commented examples


1. Influence of the opacity of the text watermark

The following watermarked images differ by the text watermark opacity.
The values are 30%, 50%, 70% and 90%. The other settings are:
Text perimeter opacity = 0%
Font color = HSV [48,75,100]
The no color box is unchecked

The text opacity is 30%
The text opacity is 30%

The text opacity is 50%
The text opacity is 50%

The text opacity is 70%
The text opacity is 70%

The text opacity is 90%
The text opacity is 90%



2. Influence of the opacity of the perimeter of the text watermark

The following watermarked images differ by the text perimeter opacity.
The values are 0% and 30%. The other settings are:
Text opacity = 30%
Font color = HSV [48,75,100]
The no color box is unchecked

The text perimeter opacity is 0%
The text perimeter opacity is 0%

The text perimeter opacity is 30%
The text perimeter opacity is 30%



3. Influence of the check box 'no color'

The following watermarked images differ by the check-box 'no color' which is either checked or unchecked. When the box is checked, the text characters appear with the lightened colors of the photo, instead of appearing in the selected font color.
The other settings are:
Text opacity = 70%
Text perimeter opacity = 0%
Font color = HSV [48,75,100]

The 'no color' box is unchecked
The 'no color' box is unchecked

The 'no color' box is checked
The 'no color' box is checked



4. Influence of the font color when 'no color' is unchecked

When the box 'no color' is unchecked, the text will be written with the selected font color and the text perimeter (or text surroundings) will be colored with the complementary of the font color. That should assure a good contrast of the text with its surroundings.

The following watermarked images differ by the HSV triplet of the font color.
The HSV triplets are respectively [48,75,50] [48,75,75] [48,75,100]. The other settings are:
Text opacity = 70%
Text perimeter opacity = 30%
The no color box is unchecked

The font color is HSV [16,75,100]
The font color is HSV [16,75,100]

The font color is HSV [48,75,100]
The font color is HSV [48,75,100]

The font color is HSV [85,75,100]
The font color is HSV [85,75,100]

The font color is HSV [145,75,100]
The font color is HSV [145,75,100]

The font color is HSV [185,75,100]
The font color is HSV [185,75,100]



5. Influence of the font color when 'no color' is checked

When the box 'no color' is unchecked, the 3 parameters of the font color, expressed as HSV, do affect the result. When the box 'no color' is checked, the hue of the font color is irrelevant, but the saturation and the value of the font color do have an influence on the result. Therefore, when choosing a font color, it is advisable to think in HSV coordinates rather than in RGB coordinates.

The following watermarked images differ by the value parameter of the HSV triplet of the font color.
The HSV triplets are respectively [48,75,50] [48,75,75] [48,75,100] The other settings are:
Text opacity = 70%
Text perimeter opacity = 0%
The no color box is checked

The font color is HSV [48,75,50]
The font color is HSV [48,75,50]

The font color is HSV [48,75,75]
The font color is HSV [48,75,75]

The font color is HSV [48,75,100]
The font color is HSV [48,75,100]



Download

Link to the download page of the script 'Watermark it'. The script is available in english, french and german.



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