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

Ch. 8 - Viewing, Editing, and Annotating ImagesAdjust Brightness (additive) (RGB)Use Adjust Brightness (additive) to lighten or darken anentire image. This function adds or subtracts the specifiednumber(s) from the red, green, and blue values for everypixel in the image. Because this is an additive function, itaffects bright and dark areas equally. You can change animage's brightness either by adjusting all three values (e.g.,red, green, and blue) together, or adjusting each valueindividually.To Adjust Brightness (additive), follow these steps:1. From the Edit menu, select Adjust RGB and AdjustBrightness (additive). The Additive Brightness Adjustwindow appears, with a thumbnail preview of the open image.The Lock RGB and Modify Main Image boxes are checked as defaults. To adjust the RGB valuesindividually, deselect the Lock RGB box.2. Change the brightness of the image.−−To modify an image's brightness equally for red, green, and blue values, ensure that the Lock RGBbox is checked, and either enter a number in any one of the three boxes, or use one of the sliderbars to specify a number between -255 and 255 (8 bit) and –4095 and 4095 (12 bit).To modify an image's brightness by specifying separate red, green, and blue values, deselect theLock RGB box, and enter a value for each color.3. Click on OK. The new image appears on-screen.Adjust Hue, Saturation, and Luminance (HSL)Adjust Hue, Saturation, and Value (HSV)Use the Adjust Hue, Saturation, and Luminance and the Adjust Hue, Saturation, and Value options to makeadditive changes to the HSL or HSV values in an image. This process converts the RGB values for eachpixel in the image to HSL or HSV values. After you make the adjustments, the program converts theHSL/HSV values back to RGB color space values.To change the HSL or HSV values for an image, follow these steps:1. From the Edit menu, select Adjust HSL, Adjust Hue, Saturation, and Luminance or Adjust HSV,Adjust Hue, Saturation, and Value:2. Either type in the HSL/HSV values, or use the slider bars to select the values. Each value uses its ownscale, and must be entered separately.−−Hue - Enter an angle value between -180° and 180°. This number represents the amount that thecolor wheel is rotated for each pixel in the image.Saturation - Enter a number between -100 and 100. This number is added to the saturation value(e.g., a number between 0 - pure gray and 100 - day glow) of each pixel in the image.User Guide to the SPOT Insight Camera 145