Join Eric Wexler for an in-depth discussion in this video Using selective desaturation, part of Photoshop CS3 Extended for BioMedical Research.
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In this movie, we are going to selectively de-saturate an image,or remove the…color from a region that we don't need the color in. This is good if we're…going to possibly be showing some objectionable material or if your audience…might be a bit squeamish. If you open XenoMouse.tif found in the Chapter 9…Exercise files, we can see the xenograft tumor in the mouse.…Now we want to select that area, we will use the Elliptical Marquee tool and we…will identify the region. We will adjust it, and so this is the area that we…want to keep in color. The rest of the image will change to grey scale because…it will tell us the location, but we don't need any color associated with it.…
So what we want to do is invert the selection. Go to Select > Inverse and now…the area that's selected is bounded by these marching ants and the area that is…not selected is the xenograft tumor.…Now, we are going to de-saturate by using an adjustment layer, and we are going…to go to Black and White, and here we can see that the only remaining color of…
NOTE: Actual biological research images are used for this title's examples. Some of these images, including those of internal organs and dissected animals, may be considered graphic or offensive to some viewers. Viewer discretion is strongly advised.
- Understanding imaging in biomedical research
- Getting started in Photoshop
- Organizing digital assets
- Working with image stacks
- Evaluating image color and histograms
- Modifying images for research
- Compensating for acquisition problems and limitations
- Adding reference information to images
- Sharing work
- Optimizing and creating a DICOM image or animation