testPoint

Color Geometry Effects Other

1. Basic colors

Full screen colors - 5 steps:
  • Black, White, Red, Green, Blue.
  • All colors.
    Check the color uniformity and flickering.
  • Red, Green, Blue.
    Check the color purity.
  • Black.
    Check the black level.
Small rectangles in the middle of the screen - 4 steps. This test is about color production and perception:
  • White, Red, Green, Blue.
  • Color production.
    In CRT monitors the electron/cathode gun doesn't work at full power all the time.
    This provides more natural APL (average picture level).
  • Color perception.
    A large color spot surrounded by a bigger black zone will improve the perception.
RGB color space.

2. Bad pixels

Each pixel is constructed of three subpixels - red, green and blue. It's a common case the defect to be in only one of subpixels. However this one subpixel will change the color perception about all of its adjacent pixels.
  • Stuck pixel.
    This pixel is always On. It produces light all the time and looks lighter.
  • Death pixel.
    This pixel is always Off. It doesn't produce light all the time and looks darker.
Test templates:
  • Black screen.
    • Look out about stuck pixels.
      Be aware: only one or two subpixels can be damaged and the "light" pixel to be not white but red, blue, cyan, etc.
    • Check the uniformity of gray shades.
    • Check the black level.
    • Tuneup: gray shades - black to white.
  • White screen.
    • Look out about death pixels.
      Be aware: only one or two subpixels can be damaged and the "dark" pixel to be not black but red, blue, cyan, etc.
    • Check the uniformity of gray shades.
    • Tuneup: gray shades - white to black.
  • Red screen.
    • Look out about death red subpixels or stuck green and blue subpixels.
    • Check the uniformity of red shades.
    • Tuneup: red shades - red to white.
    • Tuneup: red shades - red to black.
  • Green screen.
    • Look out about death green subpixels or stuck red and blue subpixels.
    • Check the uniformity of green shades.
    • Tuneup: green shades - green to white.
    • Tuneup: green shades - green to black.
  • Blue screen.
    • Look out about death blue subpixels or stuck red and green subpixels.
    • Check the uniformity of blue shades.
    • Tuneup: blue shades - blue to white.
    • Tuneup: blue shades - blue to black.
Tuneup the color and inspect it in middle shades about color uniformity.
RGB color space.

3. Color stripes

Test colors: Gray, Red, Green, Blue, Cyan, Magenta, Yellow. Each test has 2 steps:
  • Gradient around white.
  • Gradient around black.
Tuneups:
  • Shade level around white / black.
  • Gradient direction.
  • Number of stripes.
  • Border visibility.
Observe the borders (the transition) between stripes. Especially the "jump" in shade value.
  • The border should look same from the bottom to the top of the screen.
  • All borders should give us the same perception about the transition from the left most to the right most stripes.
Gray color space: Gray stripes.
RGB color space: all colored (RGB CMY) stripes.

4. Color gradient

Test templates: Gray, Red, Green, Blue, Cyan, Magenta, Yellow.
Each test has 2 steps:
  • Gradient around white.
  • Gradient around black.
Tuneups:
  • Shade level around white / black.
  • Gradient direction.
  • Border visibility.
Look out about:
  • The color should fade gradually.
    Look out about following defects:
    • Stripes.
      The color doesn't fade gradually but jumps in shade value.
    • Lighter or darker bays.
      The color doesn't fade equally in all pixel rows. Because of this rounded or trapezoid shapes appear.
  • Tuneup the color to black and then to 100% chroma.
    Repeat it with different speed.
    Look out about following defects:
    • Floating stripes.
      The color doesn't fade gradually all the time.
    • Flickering.
      The pane should not flicker.
Gray color space: Gray gradient.
RGB color space: all colored (RGB CMY) gradients.

5. Color gradient, pattern 6 - RGB CMY

Test colors: Red, Green, Blue, Cyan, Magenta, Yellow.
The test has 4 steps:
  • Gradient around black.
  • Gradient around black with grill.
  • Gradient around white.
  • Gradient around white with grill.
Tuneups:
  • Chroma value (color shade around black / white).
  • Gradient direction.
Look out about:
  • The color should fade gradually.
    Look out about following defects:
    • Stripes.
      The color doesn't fade gradually but jumps in shade value.
    • Lighter or darker bays.
      The color doesn't fade equally in all pixel rows. Because of this rounded or trapezoid shapes appear.
  • Tuneup the color to black and then to 100% chroma.
    Repeat it with different speed.
    Look out about following defects:
    • Floating stripes.
      The color doesn't fade gradually all the time.
    • Flickering.
      The pane should not flicker.
RGB color space.

6. Pseudo gamut

The color space is stretched to the rectangle of the screen.
Colors schemes:
  • RGB
    • Gradient.
    • Additive.
    • Subtractive.
  • CMY
    • Gradient.
    • Additive.
    • Subtractive.
  • Hue
    • Gradient.
    • Hue fading to white.
    • Hue fading to black.
Color space not supported.

7. Color Cards

This group combines 8 tests.
All tests support so called specialized view - click on a card while pressing the ⌃, ⌘ and ⌥ buttons.
This will open the specialized view - on full screen with card's color.
  • Web safe color cards
    Colors with RGB values in step of 33.
    The info layer contains color codes for each card.
    000 300 600 ... F00
    ...
    00F 30F 60F ... F0F
    030 330 630 ... F30
    ...
    03F 33F 63F ... F3F
    060 360 660 ... F60
    ...
    06F 36F 66F ... F6F
    090 390 690 ... F90
    ...
    09F 39F 69F ... F9F
    0C0 3C0 6C0 ... FC0
    ...
    0CF 3CF 6CF ... FCF
    0F0 3F0 6F0 ... FF0
    ...
    0FF 3FF 6FF ... FFF
    RGB color space.
  • Really web safe color cards
    A subset of Web safe colors.
    The info layer contains color codes for each card.
    000 F00
    003 F03
    00F F0F
    0F0 6F0 FF0
    3F3 6F3 FF3
    0F6 3F6 CF6 FF6
    0FC 3FC
    0FF 3FF 6FF FFF
    RGB color space.
  • X11 color cards
    The info layer contains color codes and names for each card.
    Test steps:
    1. Colors.
    2. Color variants.
    3. Gray shades.
    4. Color clashes with W3C.
    Gray color space: Gray cards.
    RGB color space: all colored cards.
  • CSS3 color cards
    The info layer contains color codes and names for each card.
    Test steps:
    1. Basic colors.
    2. Extended colors.
    RGB color space.
  • Gray lightness
    The info layer contains color codes for each card.
    Test steps:
    1. 32 shades.
    2. 64 shades.
    3. 128 shades.
    4. 256 shades.
    Tuneup "Range".
    This is the set of color values:
    1. [0, step, ..., 1].
      The color value is normalized in range from 0 / black to 1 / white.
    2. [0, step, ..., 255-].
      The color value is normalized in range from 0 / black to 255 / white.
      The first value is 0.
      The last value may not be 255 ("255-").
      It's due to the integral nature of the color value, the value range and the number of shades.
    3. [0+, step+, ..., 255].
      The color value is normalized in range from 0 / black to 255 / white.
      The first value may not be 0 ("0+").
      It's due to the integral nature of the color value, the value range and the number of shades.
      The last value is 255.
    Gray color space.
  • Hue lightness
    The info layer contains the lightness / brightness value of each color card.
    Test steps.
    12 test steps. The hue changes in a step of 30° (from 0° to 330°).
    The hue depends on both test step and hue offset.
    Tuneups:
    • Additional hue offset.
      From 0° to 360°. Cumulative to the hue from the current test step.
    • Shade steps.
      They are in a "2 x N" format, where N is: 16, 32, 64, 128, 256.
      The shade depends on the color space:
      • HSB.
        The first N shades are from the maximum color value to the middle / normal color value.
        The second N shades are from the middle color value to black.
      • HSL.
        The first N shades are from white to the maximum color value.
        The second N shades are from the maximum color value to black.
    Brightness vs. Lightness.
    This test respects the settings about "HS color space" in test settings panel. As a result HSL or HSB palettes can be shown. However in our docs we mention only the lightness. Depending on the settings the user should consider lightness or brightness.
    HSL / HSB color space.
  • HSL palette, template 1
    The info layer contains hue, saturation and lightness / brightness values.
    Test steps.
    12 test steps. The hue changes in a step of 30° (from 0° to 330°).
    The hue depends on both test step and hue offset.
    Tuneups:
    • Additional hue offset.
      From 0° to 360°. Cumulative to the hue from the current test step.
    • Shade steps.
      They are in a "%" format, where the percentage is: 20, 10, 5, 4, 3, 2, 1.
      The shade step depends on color space and direction:
      • Saturation.
        The saturation step is the same as the selected percentage.
      • Color space.
        The shade step is in a "2 x N" format, where N is the selected percentage.
        • HSB.
          The first N shades are from the maximum color value to the middle / normal color value.
          The second N shades are from the middle color value to black.
        • HSL.
          The first N shades are from white to the maximum color value.
          The second N shades are from the maximum color value to black.
    Brightness vs. Lightness.
    This test respects the settings about "HS color space" in test settings panel. As a result HSL or HSB palettes can be shown. However in our docs we mention only the lightness. Depending on the settings the user should consider lightness or brightness.
    HSL / HSB color space.
  • HSL palette, template 12
    The info layer contains hue, saturation and lightness / brightness values.
    The hue depends on tuneup and palette table.
    5 test steps. The shade changes with a step of 20%, 10%, 5%, 4%, 3%.
    The shade depends on color space and direction:
    • Saturation.
      The saturation step is the same as the selected percentage.
    • Color space.
      The shade step is in a "2 x N" format, where N is the selected percentage.
      • HSB.
        The first N shades are from the maximum color value to the middle / normal color value.
        The second N shades are from the middle color value to black.
      • HSL.
        The first N shades are from white to the maximum color value.
        The second N shades are from the maximum color value to black.
    Tuneups:
    • Hue offset.
      From 0° to 30°. Cumulative to the hue of each palette.
    Brightness vs. Lightness.
    This test respects the settings about "HS color space" in test settings panel. As a result HSL or HSB palettes can be shown. However in our docs we mention only the lightness. Depending on the settings the user should consider lightness or brightness.
    HSL / HSB color space.
Apple, the Apple logo, App Store, Mac, Mac OS X and macOS are trademarks of Apple Inc.