TRICKS OF THE TRADE 3

The members of the former Imaging Artists newsgroup, which was a WebTV-MSNTV only group, share their expertise and discoveries with each other. For those who had never looked in on this newsgroup, here are some of the tips for working with images at the Image Magick studio.

Shaving a Wave
Find That Spot
Saving Details
Beware of Shadows
Save Time with Preview
Information Center
Colorwrap
Crop & Shave
Chop-Crop
Get Rid of the Center
Simple Crop
Color Patch
Colormap vs. Output
Hex Codes for Chocolate
Background Images Inside Draw
Making Pattern Backgrounds
Transparent vs None
Outputting Transparent Gifs
Transparent Draw
Input Resizing
DRAW-Path
Cubic vs Quadratic Beziers
More About s, q & t
Drawing Leaves


Making Color Patches -
From Diana (BDiana):


Another use for a quick DRAW on IM is the creation of color patches. Of course someone with a printer can print them out for reference, but I like to make them to compare holiday colors, RGB colors, world colors, true colors and Netscape colors in different shades, but in the same color family.

For instance the shade of WHITE= hexcode #FFFFFF and the whiter and less whiter derivations of 'white' are just as intriguing to incorporate in imaging.

I used Arbor IM for the patch. You can make it as wide or tall as you'd like it.

My choice:

400x300.xc transparent
DRAW, rectangle and kept each one at 100x100.

From left==>right and top==>bottom, the Netscape whiter shades are:

1st row: FFFFFF(white)-linen-antiquewhite-beige
2nd row: gainsboro-whitesmoke-oldlace-ivory
3rd row: ghostwhite-snow-flowerwhite-seashell

The advantage of making a color image patch is the 'low' bytesize (1K) and easy access to a comparison swatch for imaging, painting. clothes, backgrounds etc.etc.etc.

Here is the whiter shades of pale as described above:

http://dpb.250free.com/ShadesOfPale.jpg

Try it for fun. Take red, tomato, firebrick, #250000 (my favorite burgundy wine red lol)...etc. and see how you can make a same color patch quilt of Internet colors.

From Diana (BDiana) - Colormap/Gray vs. Output/Grayshadematte


It's best to optimize the image beforehand (clearing comments etc.). Under colormap leave dither checkmarked otherwise the background might start patching on you.

Also there are only 100 shades of gray in imaging. Anything between ffffff and 000000 (gray1 to gray99). So I usually erase the 256 colors and add 100 instead. Checkmark gray and dither and press quantize. Under Output don't choose anything Matte for .jpgs. Matte preserves transparency in gif and png imaging. I usually just use Truecolor or Implicit, Compress JPEG, Quality 65, single file.
From Diana (BDiana) - Hex Codes for Chocolate


These are the chocolate colors I usually use:

#191004
dark
#261807
milk
#3e1f1a
light
#211405
Hershey
Putting Background Images Inside Draw Figures -
From Jean (lnjweaver):


First, make a shape or figure, using Draw, on a transparent background. Using the backgound image, composite it onto the Draw, using "In." This will leave the bg image showing only inside the Draw shape. Output as a gif, to preserve the transparency. Now you can use this new Draw to composite-over any other image for decoration or whatever.



Using Clipboard Images


Diana's (BeeDiana) Clipboard Paint tute
Flo's (tonebytone) Clipboard Paint tute
Ms V's (chocolataa) Filled Draw tute
Making Pattern Backgrounds -
From Flo (tonebytone):


Make a pattern bg of 50x50 or 100x100. Choose one of the grays - each will give a different pattern when enlarged. Then resize to 300x300 or 400x400. Start painting, using blur of 999, or up to 2500 and "replace." Click on any square, and all squares within the blur parameters will be painted. Keep on painting until you have what you want.

Example.
Transparent vs None -
From Diana (BeeDiana):


'Transparent' and 'none' as a META input on the front IM page is the same. If you leave it just empty/blank, it will give you an error message. You need to type in none, None or NONE. Please try it.

On the bottom @ Meta type in 'none'. Of course the rest of the procedure is the same. Click on .XC and choose your Size.

BTW, this works under DECORATE and COLOR to add a border/frame/raise/sunk as well.
Outputting Transparent Gifs -
From Diana (BeeDiana):


When you outupt, use Truecolor, as this gives the smallest file size for jpgs and gifs.

From Dave (pagemaster101):


To save the transparency permanently for a gif, it must be done in the alpha channel. This allows browsers to read the image codes correctly and deliver the proper transparency. At IM, select "truecolormatte" as the image type. This will put the transparency in the proper channel.
"Transparent" Draw -
From Flo (tonebytone):


I used one of Sleeper's Path Draw Shares for this. First I copied her coords for the Path Draw into memory. Then I made an xc bg in white, 25 pixels wider than Sleeper's bg.

. 1st Draw, using FC #999999, SC #666666, SW of 2.
2nd Draw: FC #666666, SC #333333, and Translate 5.0, 2.0.
3rd Draw: FC #333333, SC black, Translate 10,0, 4.0
Output for temp url.
Back to Input. Plasma bg 50 px wider and higher than Draw image.
Comp/Diff, grav center

Example
As you can see, this made the figures seem transparent, so the bg shows.
Input Resizing -
From Diana (BeeDiana):


If you wish to resize an image at IMagick, you can do this right on the INPUT page and don't have to go to RESIZE. Just do this:

  1. Take your image.jpg to any of the IMs.

  2. Enter the URL and scroll all the way down the page.

  3. Under SCENE enter this:

    .1 (this resizes your image W+H in half); or

    .5 (resizes your image W+H in fourth, half of half); or

    .7 (resizes your image W+H in eighth, half of fourth); and so forth.

The higher the number, the smaller the resize.

NOTE: make sure you write a point (.) in front of the number.

I used REDUX IM to test this:

Here is a test image to try it out: original: 380x284
.1= 190x142
.5= 95x71
.7= 48x36


The above information Copyright © 2007 by the above authors

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