Step 1
- Load photo into GIMP.
- Colors > Desaturate
- Luminosity
- OK
 |
| Luminosity Desaturation |
Step 2
- Duplicate layer (Ctrl+Shft+D)
- Colors > Invert
- Layer Mode: Dodge
 |
| Dodged Inverted Layer |
Step 3
- Filters > Blur > Gaussian Blur
- Blur Radius: 11.0
- OK
(NOTE: Depending on the size of your image you may need more or less blurring. Adjust to taste.)
 |
| Pencil Sketch Effect |
Step 4 (Optional)
- New Layer (Ctrl+Shft+N)
- Layer Mode: Multiply
- Select a color and a brush and start painting using the pencil sketch backdrop as a guide.
 |
| Painting Practice |
This is a cool technique you can use to practice your painting skills or to create coloring sheets for kids.
This technique was described in an article called Real-World Brush Effects by Rich Harris in the September 2003 issue of Photoshop User.
You can accomplish a similar effect by using GIMP's Filters > Artistic > Photocopy filter after desaturating the image. It has four adjustments: Mask radius, Sharpness, Percent black, and Percent white.
The G'MIC plugin has several pencil sketch-type filters that create different results than that described above, but are worth playing with to get interesting effects. To name a few, on the Artistic menu are Colored Pencils, Graphic Novel, and Pen drawing. And on the Black & white menu are BW Steampunk-Pen, Charcoal, Ink wash, Pencil, and Pencil portrait (very nice!).
(Please note: All images in this tutorial are provided for instructional purposes only. I am not giving permission for copying, transmitting, selling, or otherwise using these images for any purpose other than practicing using Inkscape. Exception: Posting an unaltered image to your website for display only with credit given to me and a link provided back to this post is allowed.)
Acknowledgement
This technique was described in an article called Real-World Brush Effects by Rich Harris in the September 2003 issue of Photoshop User.
Alternatives
You can accomplish a similar effect by using GIMP's Filters > Artistic > Photocopy filter after desaturating the image. It has four adjustments: Mask radius, Sharpness, Percent black, and Percent white.
The G'MIC plugin has several pencil sketch-type filters that create different results than that described above, but are worth playing with to get interesting effects. To name a few, on the Artistic menu are Colored Pencils, Graphic Novel, and Pen drawing. And on the Black & white menu are BW Steampunk-Pen, Charcoal, Ink wash, Pencil, and Pencil portrait (very nice!).
(Please note: All images in this tutorial are provided for instructional purposes only. I am not giving permission for copying, transmitting, selling, or otherwise using these images for any purpose other than practicing using Inkscape. Exception: Posting an unaltered image to your website for display only with credit given to me and a link provided back to this post is allowed.)
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