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image help..!

Aug 21, 2011, 05:38
Post: #1
image help..!
i am total newbiw to Gimp. however i want to edit a few pics of mine but i don't know how to open a pic in a gimp background ..i mean how to cut and paste and image from one gimp document to another..!!..please i am having real trouble here also ho to resize the placed image layout with a mouse ..! please help asap... Confused
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Aug 21, 2011, 08:42 (This post was last modified: Aug 21, 2011 09:28 by ofnuts.)
Post: #2
RE: image help..!
I assume you want to cut part of an image and add it to another image...
  • In first image: use the selection tools to select what you want to copy
  • "Edit/Copy"
  • In target image: "Edit/Paste as new layer"
  • Your "import" is now movable above the target picture, as if on tracing paper
  • Use the Move/Scale/Rotate tools to adjust to posiiton

Looks simple, eh? The devil is in the details... the very hard part is to get a selection in the first step, and this depends a lot on what the image looks like.

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Aug 21, 2011, 09:09
Post: #3
RE: image help..!
tnks...
one more thing ..

can u send me a gimp tutorial to create a fashion model with a rusty background..it would be great help....thnx in advance..
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Aug 21, 2011, 09:43
Post: #4
RE: image help..!
- find rusty background
- find fashion model
- slap #2 over #1 as indicated in previous post

Seriously, before you can get to this kind of work and produce acceptable results,, you need a lot more flight hours with Gimp. Gimp is a tool, no more, no less. If I give you a stone, a hammer and a chisel you'll mostly produce a pile of rubble and not a statue.

Don't be fooled by "tutorials". If you know Gimp, you can understand why the tutorial does things in specific ways and you can adapt that to your problem and learn a new trick in the process, but if you are a beginner, you just repeat the tutorial like a monkey, and if your images don't match the expectations of the author of the tutorial it won't work (and tutorials always use the "right" images...). In other words tuts are like road directions, when you get lost (and you will) they won't get you back on the road.

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Aug 21, 2011, 11:47
Post: #5
RE: image help..!
okay...i will try at my own then and more mistakes vill help me learn more in the process...
thnx for the advice...
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Aug 21, 2011, 11:48
Post: #6
RE: image help..!
there is one thing i am seriously not getting ..masks and channels and how to use them..please tell me in the simplest words if possible...tnx in advance..! :
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Aug 21, 2011, 14:22
Post: #7
RE: image help..!
Now that's a good question...

The R,G,B channels are monochrome images that, when added together, produce your final image layer. They can be seen as grayscale images, which are colored through the appropriate color filter before being added to the others. Values in a channel range from 0 (nothing) to 255 (full). In a monochrome image, black is 0, white is 255. In a color image, black is 0,0,0 (all channels at 0), and white is 255,255,255 (all channels at 255). A blue pixel is (0,0,255). It is also useful to understand these numbers as percentages or values between 0 and 1 (the 0-255 values are a byproduct of storing color channel values in bytes). In Gimp3 the 0-255 notation won't be useful anymore.

The Alpha channel is a fourth grayscale image that controls the transparency of the pixels produced by the RGB channels. The image/layer is opaque where the channel is white, and transparent where it's black. Gray tones indicate partial transparency. A 50% gray tone indicate that the final image is 50% of the layer + 50% of everything under it (the actual rule is a bit more complicated). The Paint tools by default only deal with the RGB channels. The Alpha channel is dealt with by the Eraser tool (erasing something is making it transparent), and, for more complex handling, by extracting it to a "Layer mask" where it can be dealt with using the ordinary paint tools and then applied back. Inide Gimp, there is an alpha channel or layer mask per layer.

Another grayscale image is the selection mask. The selection mask tells Gimp which pixels you want to act on (the selected pixels). The selection mask is often referred to as the "selection" but this may leads to confusion, for instance in the Move tools, "Move selection" moves the selection mask, not the select pixels. 0 (black) is no selection, 255 (white) is full selection, gray levels correspond to partial selection. When acted upon, pixels with partial selection often ends up with partial transparency. For instance, deleting the selection makes fully transparent the fully selected pixels but only partially transparent the partially selected ones. The selection mask applies to the image as a whole and not to a specific layer: in most operations, the target pixels are those of the current layer that falls in the selection mask. The Selection mask can be painted using the regular paint tools by entering the "Quick mask" mode.

All these grayscale images can be exchanged (mostly in your "Channels" dialog).
  • Color to any saved channel: duplicate channel
  • Alpha Channel to any saved channel: duplicate channel
  • Alpha Channel to Selection: Layer/Transparency/Alpha to Selection
  • Selection to any saved channel: Select/Save to channel
  • Saved channel to selection: Channel to selection (plus all the add/subtract/intersect operations)
  • Saved channel to alpha channel: add layer mask, and initialize to Alpha channel

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