SmallHD C7 Calibration Overview
The SmallHD C7 is a 7-inch touchscreen LCD production monitor with an IPS panel from SmallHD designed for professional filmmakers and videographers. It features a 1920 x 1200 resolution display with a brightness of 1800 nits, ensuring visibility even in bright outdoor environments.
The SmallHD C7 display is a popular on-camera monitor, used by DOPs, ACs and directors.
Below is an overview of the display's performance before and
after professional SmallHD C7 calibration .
A 3D LUT calibration was done as the SmallHD C7 has internal LUT storage.
Equipment, software and target used in the calibration:
- Calibration software: DCM
- Colorimeter: CR-100
- Spectro: CR-300
- Patch generator: DaVinci Resolve, SDI out
- Calibration target: Rec 709 D65 G2.4 130 nits (SDR)
Native Gamut
This is the native gamut (before calibration) of the SmallHD C7 compared to the Rec 709 color space calibration target. The display does not fully cover 100% blue in Rec 709, therefore it cannot accurately reproduce that color.
White Point
This is a close-up of the native white point (before calibration) compared to the calibration target of D65, the display white point shows deviation from target and a red tint.
RGB Balance
This is the Greyscale RGB balance before 3D LUT calibration, it has a blue and red tint.
EOTF: Gamma
This is the native gamma and luminance response of the SmallHD C7. The reference line is configured for the calibration target G2.4. The display in its default native state is excessively bright.
Spectrum Analysis
This is the spectrum of the SmallHD C7 in native gamut for full white, with the red, green and blue primaries spectral output overlaid to identify color channel issues.
Calibration
After display preparation and configuration, a large display profile is run to create a detailed characterization of the display. From that profile data, a 3D LUT is then generated by DCT and uploaded into the display.
Gamut & White Point (post)
Gamut (post calibration) compared to the Rec 709 D65 target - W, R, G points are on target, the B primary has been corrected by the LUT, but the display cannot reproduce full Rec 709 blue (see above).
RGB Balance (post)
This is the Greyscale RGB balance post-calibration, a huge improvement.
EOTF: Gamma (post)
This is the gamma and luminance response of the SmallHD C7 after calibration compared to the reference calibration target G2.4. A significant improvement, the display tracks the reference closely - performance in the shadows will always be compromised on LCD monitors, due to the backlight.
Color Error: delta E 2000 (post)
These are the dE 2000 stats post calibration for a 1,100 point stress test validation profile. With an average dE
2000 color error of only 0.83, the SmallHD C7 now performs very well given that the JND (just noticeable
difference) for human vision is set at a dE 2000 value of 2.3.
All 77 points with a dE 2000 > 2 are either in the shadows (the higher color error is caused by the LCD backlight) or in the blue region.
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