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

Ch. 8 – Viewing, Editing, and Annotating Images−Luminance or Value - Enter a number between -100 and 100. This number is added to theLuminance/Value value (e.g., a number between 0 - pure black and 100 - pure white forLuminance/brightest version of hue if Value) of each pixel in the image.Note: The scales used to measure HSL/HSV values are not standardized. Thus, the scales used bythe SPOT software might differ from those of other programs.3. Click on OK. The new image appears on-screen.Adjust Brightness (multiplicative) (RGB)Use Adjust Brightness (multiplicative) to make the bright areas of an image brighter or darker. Thisfunction multiplies the red, green, and blue values for every pixel in the image by the number(s) that youspecify. Because this option is multiplicative, it affects bright areas more than dark areas: black areas tendto stay black while lighter areas get brighter. Like the Adjust Brightness (additive) option, themultiplicative option enables you to either adjust the RGB values together or as individual units.To use the Adjust Brightness (multiplicative) function, follow these steps:1. From the Edit menu, select Adjust RGB >Adjust Brightness (multiplicative). TheMultiplicative Brightness Adjust windowappears, with a thumbnail preview of theopen image.The Lock RGB and Modify Main Imageboxes are checked as defaults. To adjustthe RGB values individually, deselect theLock 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 0 (darkest) and 5 (brightest).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 Luminance (multiplicative) (HSL)Adjust Value (multiplicative) (HSV)Adjust Luminance (multiplicative) and Adjust Value (multiplicative) make the bright areas of an imagebrighter or darker when editing in the HSL and HSV color spaces. These functions multiply theLuminance or Value values for every pixel in the image by the number that you specify. Because theseoptions are multiplicative, they affect bright areas more than dark areas.To Adjust Luminance (multiplicative) (HSL) or Adjust Value (multiplicative) (HSV), follow these steps:146 User Guide to the SPOT Insight Camera