HARD & SOFT|
and Gaussian Blur
an Image Magick Tute by Flo
|Use a jpg or gif that has a subject with a fairly simple outline and a plain colored background:|
- Transparentize the background:
- Input the jpg
- Scroll down below the image to the Paint. Select blur of 9999, floodfill, matte.
- Click on the background area.
- Output as a gif and save.
- Copy and paste this new url into your Find key. This is the image you will composite over the shadow image.
- Use Gaussian Blur in Effects:
- For a hard shadow: Use the transparentized gif.
For a softer shadow, use the original jpg.
Input the image into the IM.
- Resize this image to 10 pixels wider and 10 pixels higher than its present size. Remember to use the exclamation point right after the height dimension: 320x240!
- To darken the shadow, go to Effects.
- Type in 10x10, 20x20 or other numbers.
Select Shade if you want some color or
Gray Shade if you want a gray shadow.
Click on Effect.
- The background will also darken. At this point, if the bg is too dark, Paint it with the proper hue.
- Click on Effects again. Set parameters to 10x10, 20x20, or 30x30.
The larger the numbers, the softer the blur. If you want a harder edge, use 5x5.
Note: if you are using the gif with the transparent bg, you will get a hard shadow. The blurring will not extend into the transparent area.
- Click on Gaussian Blur, then Effect.
- Copy the gif url from your Find key and paste it into the box on the Composite page.
- Set Gravity to Center.
For a shadow to the left and above the image, Offset +2+2 or more.
For a shadow to the right and below the image, Offset -5-5 or more.
- Click on Compose. (This will composite the gif Over the blurred jpg)
- You can Paint the bg another color now if you wish.
- Output as a jpg and save.
Now you will have an image with either a hard or a softened Drop Shadow.
Hard Shadow made with the transparent gif
Soft Shadow made with the original jpg
Back to Flo's Image Magick Tutes