SPOT 4.1 Basic and Advanced Software Manual for SPOT Insight ...

Ch. 8 – Viewing, Editing, and Annotating ImagesContrast (RGB) process, the Adjust Contrast (HSL/HSV) process works only on the Luminance/Valuevalues for an image as opposed to the specific red, green, and blue values.To use Adjust Contrast (HSL/HSV), follow these steps:1. From the Edit menu, select Adjust HSL and Adjust Contrast or Adjust HSV and Adjust Contrast.The Modify Main Image box is checked as a default.2. Enter a value between .1 and 4, or use the slider bar to select a value. The thumbnail changes as youadjust the value.−−To exaggerate the contrast of an image, enter a value above one (the base value).To subdue the contrast of an image, enter a value below one (the base value).3. Click on OK. The new image appears on-screen.Adjust Gamma (RGB)Gamma Adjust smoothly lightens darker areas of an image without burning out bright areas or lighteningblack areas. This is especially useful for editing images with a wide range of brightness values (dynamicrange). Gamma adjustment corrects an image by creating a new version of the original. Refer to Ch. 5 –Preparing to Take a Picture for a more detailedexplanation of gamma adjustment.To adjust gamma, follow these steps:1. From the Edit menu, select Adjust RGB andAdjust Gamma. The Gamma Adjust windowappears. The Lock RGB and Modify MainImage boxes are checked as defaults.2. Gamma adjust the image.−−To adjust the gamma equally for red,green, and blue values, ensure that theLock RGB box is checked, and either enter a number in any one of the three boxes, or use a sliderbar to specify a number between .1 and 4.To gamma adjust an image by specifying separate red, green, and blue values, deselect the LockRGB box, and enter a value for each color.Note: The ability to deselect the Lock RGB box and enter specific RGB values distinguishes the useof the Adjust Gamma menu option from the Gamma Adjust option on the Image Setup window (seeCh. 5 – Preparing to Take a Picture).3. Click on OK. The new image appears on screen.148 User Guide to the SPOT Insight Camera