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11. Click the colors you want to use for the correction curve (Figure 38-3). As of use only the white, shades of grey and the black.
Figure 38. Image Correction Window.
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4. In the Compare tab check that the corrected color square and Xrite color checker RGB values are very close (Figure 40). There is also a visual display so you can see the difference in color for the color checker and the corrected. If you are unable to produce a reasonable correction curve, it is necessary to redo your white balance correction described in the Calibration section below.
Figure 39. Tiff Correction
Note: the TIFF correction is applied to both the TIFF and JPEG image but for the JPEG image you can also apply a Brightness, Contrast and Gamma (BCG) correction (See JPEG Correction section below). This is done at the photographer’s discretion. With better balanced LEDs on the new light system you may not have to use the BCG corrections (leave the values at their mid-points. Figure 41-1).
Figure 40. Use the Compare tab to view the RGB values for the Xrite color checker and the corrected.
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3. If the values are good and there are no streaking issues in the images or other unwanted artifacts, you can click Save and no further adjustments are needed. However if you have determined the doesn't look good, click Cancel and you have to redo the Calibration section and complete the Calibration instructions.
Figure 41. JPEG Correction using Brightness, Contrast and Gamma.
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