1. How I used GIMP to process my astronomical sketches
26/5/14

2. Open original image in GIMP

3. Rotate it to correct orientation

4. Invert colours

5. Chose selection tool

6. Select object by taking mouse to start point, pressing and holding down left mouse button whilst drawing around object until get back to start point

7. Use Gaussian blur to turn lines into smudges – choose settings to reflect look you want

8. Result of Gaussian Blur

9. Whilst still having selected the object, now use levels and brightness/contrast to adjust look
Selecting levels (left), and initial levels setting (below)
Levels setting after adjustment (left)

10. Saving final image

11. Final result