3/30/2021 0 Comments Videopad Warm Colour
Ill choose a couple of common toning examples to show what happens when you begin mixing all three channels up.From the warm glow of a sunny summer afternoon to a cool refreshing early evening in fall.In GIMP (currently at 8-bit), that means that each RGB color can have a value from 0 - 255, and combining these three colors with varying levels in each channel will result in all the colors you can see in your image.If all three channels have a value of 0 - then the resulting color will be pure black.
If all three channels have the same value, then you will get a shade of gray (128,128,128 would be a middle gray color for instance). If we were to change the values of each channel, but kept ratio the same between Red, Green, and Blue, then we would keep the same color and just lighten or darken the pixel by some amount. I could also use the drop down for Channel to change to red, green or blue curves if I wanted to. Notice a spike in the high values on the right, and a small gap at the brightest values. The best way to visualize it is to remember that the bottom range from black to white represents the current value of the pixels, and the left range is the value to be mapped to. I can do this by clicking on the curve near the midtones, and dragging the curve higher in the Y direction. Because there is only a single point in the curve right now, this means that all values will be pulled higher. The effect of this curve would be to darken the dark tones, and to lighten the light tones - in effect increasing global contrast on your image. The curve still passes through the midpoint, so middle tones will stay closer to what they were. Here is a quick way to visualize it (that is true for value as well as RGB curves). The relative positions of the darks, midtones, and lights are still the same in the curve dialog. The primary difference now is that you can control the contribution of color in specific tonal regions of your image. This is often the hardest part of adjusting the color tones if you dont have a clear idea to start with. Cool shadows are commonly seen during the day in shadows out of direct sunlight. The light that does fall in shadows is mostly reflected light from a blue-ish sky, so the shadows will trend slightly more blue. In fact, for each of the Red, Green, and Blue channels, the opposite colors on the color wheel will show you what an absence of that color will do to your image. If instead you drag the curve for blue down, you will be removing blues (or boosting the Yellows in that region of your image). So dropping the green curve in the dark tones, and letting it settle back to normal towards the high tones will produce results like this.
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