User manual FALMEC KRISTAL INSTALLATION SHEET

[. . . ] The Apple logo is a trademark of Apple Inc. , registered in the U. S. Use of the “keyboard” Apple logo (Shift-Option-K) for commercial purposes without the prior written consent of Apple may constitute trademark infringement and unfair competition in violation of federal and state laws. Every effort has been made to ensure that the information in this manual is accurate. Apple is not responsible for printing and clerical errors. [. . . ] You can also adjust the tonal curve of each color channel independently. For more information, see Using the Curves Controls for Color Correction on page 361. Before Curves adjustment After Curves adjustment Chapter 16    Making Image Adjustments 353 To adjust the tonal curve of an image based on luminance 1 Select a photo. 2 If the Curves controls are not shown in the Adjustments inspector or the Adjustments pane of the Inspector HUD, choose Curves from the Add Adjustment pop-up menu. Channel pop-up menu Curves Action pop-up menu 3 Do one of the following: •• Choose RGB from the Channel pop-up menu. Choosing the RGB tonal curve allows you to manipulate the tonal curve of the red, green, and blue color channels combined. This is the proper choice when you want to modify the tint of the image in addition to the contrast. •• Choose Luminance from the Grayscale section of the Curves Action pop-up menu, then choose Luminance from the Channel pop-up menu. Choosing the luminance tonal curve allows you to manipulate the luminance of the combined red, green, and blue color channels without affecting the image’s tint. 4 Choose the tonal range to display from the Range pop-up menu. For more information about the options in the Range pop-up menu, see Curves Adjustment Controls on page 350. 5 Choose the type of tonal curve adjustment to apply to the image from the Type section of the Curves Action pop-up menu. Choosing Linear—the default option—applies the Curves adjustment to the image evenly from pure black to pure white and beyond. Choosing Gamma-Corrected applies the Curves adjustment logarithmically to match the way the human eye perceives light, adding additional weight to the shadows. Chapter 16    Making Image Adjustments 354 6 Drag the Black Point and White Point sliders to where they touch the outside of the histogram graph, constraining the image to its new black and white points. Drag the Black Point and White Point sliders to where they touch the outside of the histogram graph. 7 Set a point along the curve by doing one of the following: •• Click a place on the curve where you want to add a point. Click the Add Point button to use the eyedropper tool to sample a portion of the photo and add a point to the tonal curve. Click the tonal curve to add a new point, and drag the new point to set the tonal value. •• Click the Add Point button and use the eyedropper tool to sample a portion of the image. Note:  You can change the Loupe’s color value sample size by choosing an option from the Adjustment Action pop-up menu. 2 If the Curves controls are not shown in the Adjustments inspector or the Adjustments pane of the Inspector HUD, choose Curves from the Add Adjustment pop-up menu. Chapter 16    Making Image Adjustments 359 3 Select the White Point eyedropper tool to activate the Loupe. Click the White Point eyedropper button to activate the Loupe. The pointer changes to an eyedropper, and the Loupe appears, showing a magnified view of the target area. By default, the Loupe is set to magnify the image to 100 percent (full size). If necessary, you can increase the magnification of the Loupe by choosing a larger magnification value from the Loupe pop-up menu. For more information, see An Overview of the Loupe on page 89. 4 Position the eyedropper over the lightest pixels in the image, then click. The sampled pixels are used to set the white point in the image. Chapter 16    Making Image Adjustments 360 Using the Curves Controls for Color Correction One of the most powerful ways to remove a color cast from an image or accentuate a desirable color cast is to adjust the tonal curves of the red, green, and blue color channels independently. It’s important to understand that you’re adjusting the colors of the image within the RGB spectrum; therefore, you reduce yellow when you increase blue, you reduce magenta when you increase green, and so on. To adjust the tonal curve of a single color channel in an image 1 In the Curves area of the Adjustments inspector or the Adjustments pane of the Inspector HUD, choose a single color channel from the Channel pop-up menu. Choose a color channel from the Channel pop-up menu. 2 Place points on the curve, and adjust them as necessary, to remove or accentuate a color cast in the image. For more information about placing points on the tonal curve, see Adjusting the Tonal Curve of an Image Using the Curves Controls on page 353. Chapter 16    Making Image Adjustments 361 Adjusting the Tonal Curve of the Red Color Channel You adjust the tonal curve of the red color channel when you want to remove red and cyan color casts in the image. Before Red Curves adjustment After Red Curves adjustment Red adjustment Move tonal curve down in the shadows. Move tonal curve down in the highlights. Move tonal curve up in the highlights. Effect Adds cyan to the shadows, removing red. Adds cyan to the midtones, removing red. [. . . ] viewfinder  The part of the camera designed to preview the area of the scene that will be captured by the digital image sensor. Vignette adjustment  An adjustment in Aperture designed to add a vignette effect to an image. See also Devignette adjustment, vignetting. Darkening, also known as falloff, at the corners of an image as a result of too many filters attached to the lens, a large lens hood, or poor lens design. [. . . ]