Brightness, Contrast, Saturation, and Sharpness Background At first glance, it might seem that doing an article on the four most common image controls would be a waste of time. After all, brightness, contrast, saturation, and sharpness are often thought to be the simplest controls as they've been around as long as the color TV. People often overlook the fact that all four are related, however, and changing any one of them can change the other three. Dji driver installer for mac. Do you know how they are related and how you are changing the balance of brightness, contrast, saturation, and sharpness by only changing one of the three parameters? Let's take a look.

The default on the macbook pro seems to be 100%. Which is too bright for photo editing- it makes the printed photograph much darker than intended. So i will need to adjust the setting on the mac itself. For photographers what should the brightness setting be? Oct 22, 2018 - How to calibrate Apple's iMac or iMac Pro Retina? It but above all to edit your photos on it and obviously some photo retouching. In their monitor preferences the 'Automatic brightness' option, which must absolutely be.

Brightness Brightness is generally thought to be the simplest in concept. Just make the image brighter or darker by a specified amount, right?

First we must distinguish between true brightness and something else called 'gamma'. Increasing gamma by moving a mid-tone slider on a histogram is not the same as increasing brightness. Photofiltre studio for mac. Increasing Gamma/mid-tones can make an image look brighter, but it is non-linear in that it only increases brightness of the shadows and mid-tones in an image without affecting the highlights. Traditional brightness on the other hand, simply brightens the entire image from the shadows to the highlights equally.

Let's see what happens when we add some brightness to an image. The following test image is designed to bring out some of the effects we will refer to in this article. Fig 1: Increase Brightness In figure 1 above, we have increased brightness on the right half of both the B/W and color images. In this case, we didn't increase brightness enough to clip the highlights (brightest colors) so we've only affected brightness here.

Fig 2: Extreme Brightness If we had made a more drastic change such as the one shown in figure 2 where we added even more brightness, we may have clipped the white/red spokes in the wheel which would have affected contrast, saturation, and sharpness! In the extreme case shown in figure 2 above, we have added so much brightness that the shadows have 'caught up' to the highlights because they are already as bright as they can get. Now we have reduced saturation, reduced contrast, and reduced sharpness as a result. The same effect can be seen if we had reduced brightness to the point that the shadows had nowhere else to go and the highlights started catching up to the shadows. Depending on how close your shadows/highlights are to their endpoints already, you don't need an extreme change in brightness to affect the other parameters either. When increasing brightness, you may find that you lose some contrast on the brightest details in the image while the rest of the image has the same contrast as before.

Again, this is due to the clipping that is caused in the highlights. Contrast Contrast is defined as the separation between the darkest and brightest areas of the image. Increase contrast and you increase the separation between dark and bright, making shadows darker and highlights brighter. Decrease contrast and you bring the shadows up and the highlights down to make them closer to one another.

Adding contrast usually adds 'pop' and makes an image look more vibrant while decreasing contrast can make an image look duller. Here is an example where we add some contrast. Fig 3: Increase Contrast In figure 3, we have added contrast to the right half of both images. As you can see, the white/red spokes have gotten brighter while the background has gotten darker. This causes the image to look more defined. By making the highlights brighter, however, we've also increased the brightness of the spokes, causing the image to appear brighter since the spokes are the main focus of the image.

On the red image, increasing the brightness of the spokes has also increase saturation (defined below). Finally, sharpness has also been increased on both images (also defined below). Here, we have increased brightness, contrast, saturation, and sharpness simply by adding contrast! Note that not all areas of the image will be affected equally and a lot depends on the content of the image itself.