The original image had rather muddy colors at least compared to this new image whose dynamic range and midtone values have been corrected. Nevertheless, Figure 6, which has been corrected for dynamic range and midtone values, has a definite green tint to it. This is addressed in the following section. The GIMP has many tools which can be used for color correcting images. Color imbalance is rarely uniform over all value levels in an image.
Curves allows the image to be corrected in the appropriate value zone.
Unfortunately, the GIMP does not allow the precise color correction that is available in PhotoShop. This is due to the fact that the Color Picker does not work in conjunction with Curves . The Color Picker is a very powerful tool for identifying exactly which areas of an image have a color imbalance problem and at which brightness level the correction needs to be applied. In PhotoShop the Color Picker can work simultaneously with Curves and in addition image values queried with the Color Picker can be made to appear directly on the Curves display. This allows for very precise color correction in PhotoShop since Curves can be adjusted exactly where it is needed.