JV's+Milestone+Report+(Step+5)

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Milestone Report Step 5 (Step 5.) Open the images in Photoshop and balance the “K” values of each image.) After becoming familiar with Photoshop this step should be easy. You start off by opening each of the images (Red, Green, Blue, and Luminance) and click on the eyedropper tool. The instructions on how to balance the “K” values are explained clearly in the “How to Astroimage” document.

“You want to open all of your compiled tiffs. Look at your R channel image first (make sure that is the only image up on the screen with all others minimized). This will help in not getting confused during the following steps. Next, go ahead and select the “eye dropper” tool and click on the “info” palette located on the upper right-hand side of your screen (if your screen shows default workspaces). When you have that done go to your image with the eyedropper and drag it around lets say the upper right-hand part of your image. While looking at the info palette, with the “K” value you notice that it will change. Be very precise in looking at what the highest “K” value is. Record your “K” value for the R channel down on a piece of paper (you’ll want to do this for all of the other images also). This step will help us determine the normalization of your images. So your highest “K” value lets say for example is “89%” (it is OK if it is not, I am just using that as an example). Minimize whichever image has the highest “K” value and return to an image that has a lower “K” value. What you want to do, is lets say that the green channel image has a “K” value of 87% - so you in order for your image to be normalized (having all the colors equal or very close to equal) you are going to want to boost the “K” value up to the highest value – which in this case is 89%. To do that, hit “Ctrl + L” to bring up “Level” and boost your left most input up a few values (say 2 or 3 to start out with). Now, take your eyedropper tool and sample that area that you did before to get the “K” value and see if it changed to 89%. If it did, GREAT you are done with that image for now. If not, just experiment until it does get up to that value. After you’ve got that channel done minimize it and complete the above steps for the other channels.” (How to Astroimage) Here is a link to the original document :[|Milestone Progress Report - How to Astroimage.doc]

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