QuickGamma is a highly usable and widely applicable monitor gamma calibration tool. The latest version of QuickGamma effectively resolves various display issues, enabling your monitor to achieve optimal visual performance. Monitor gamma refers to the relationship between the input signal and the brightness output of the display. Adjusting the gamma value enhances the depth and tonal gradation of the image. QuickGamma also supports sRGB and EDID RGB modes.
Software Introduction
Gamma value is simply a result that represents the slope of the relationship between image input and output values. (It is sometimes also used to describe screen contrast.)
In simple terms, there is no absolute "higher is better" or "lower is better" for gamma values—what matters is adjusting it to an appropriate level based on your needs.
The gamma value refers to the relationship between input values and the brightness output in printing technology or image processing. It affects the tonal distribution from highlights to shadows in the original image. Without color management, users can adjust the monitor's gamma value to simulate the viewing conditions when comparing the image on the screen with the original. When using color matching software, the system specifically defines the monitor's gamma value.
Gamma value affects the mid-tone colors or the gray levels in the middle range of an image. By adjusting the gamma, you can change the brightness of the mid-tone gray levels, enhancing the image's mid-tone detail without significantly affecting the shadows or highlights. Entering a value greater than 1 expands the mid-tone range, resulting in lower contrast and more detail for images dominated by mid-tones. Entering a value less than 1 narrows the mid-tone range, increasing contrast but reducing image detail. When the curve moves downward, corresponding pixels become darker; when it moves upward, pixels become brighter. Gamma adjustments are often used in conjunction with brightness and contrast settings to achieve optimal results.
Software Features
The relationship between the input signal and the monitor's brightness is not linear, but follows an exponential curve with γ as the exponent. Monitor gamma values typically range between 1.4 and 3.2.
Since only a gamma value of 1 approximates a linear relationship, gamma correction is necessary to achieve the highest image fidelity—especially for Windows, the internet, and digital photography.
Gamma correction is automatically applied under Windows, which assumes a monitor gamma of 2.2 and aims for a linear brightness distribution. However, most computer monitors do not natively have a true gamma of 2.2, so additional calibration is required. With QuickGamma, you can calibrate your monitor to a gamma of 2.2, combining automatic gamma correction to achieve a linear brightness response on any display.
Usage Guide
1. Before using QuickGamma, set your monitor's color temperature to 6500K (most manufacturers set the default to 9300K for a "crisper" look, which makes the image appear cooler). Refer to your monitor's manual for instructions on adjusting color temperature. Next, set the monitor's contrast to maximum (though avoid setting it too high, as this may prevent accurate color calibration), and adjust brightness according to the following steps.
2. In QuickGamma, there are two gray-scale bars labeled 【BLACK LEVEL A】 and 【BLACK LEVEL B】. Adjust the monitor's brightness so that you can clearly distinguish all shades in 【BLACK LEVEL B】 from light to dark, and ensure that the visible range of 【BLACK LEVEL A】 extends to the 2.2 mark (labeled on the far left of the screen). It is recommended that the visible range of 【BLACK LEVEL A】 reaches 2.2, and should not fall below 1.9 at the minimum.
3. Next, adjust the 【RGB values】 in the red box in the image above. The goal is to make the left-side bar—composed of alternating black and white horizontal lines—blend perfectly with the adjacent solid gray area at the 2.2 point (i.e., the area within the blue box in the image should appear as a uniform shade of gray).
4. If you cannot achieve the above result no matter how you adjust, click the 【Adjust Gamma for Red, Green and Blue individually】 button to fine-tune the gamma values for each RGB channel separately. After clicking, the interface will change accordingly.
The adjustment principle remains the same: adjust each color channel so that the corresponding red, green, or blue bar appears as a uniform color at the 2.2 point. Specifically, when adjusting red, focus on the red bar; when adjusting green, focus on the green bar, and so on.
5. After completing the calibration, check 【Run QuickGammaLoader at Windows Startup】 and click 【Set Current Gamma as QuickGammaLoader Default Gamma】 so that your calibrated settings are automatically loaded the next time Windows starts.
Finally, click 【OK】 to complete the basic color calibration of your screen.