Tuesday, 21 February 2012

How to HDTV Calibration and Picture setting by yourself.

Posted on 02:05 by Wrist man

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How to Calibration HDTV by yourself.

What is a good picture?

The good picture is "the same or close to the original; For example, the original film or original digital files in the studio". If the comparison is with the audio; the good sound to be able to convey details of the sound is the same singer. If compared with the CD Audio is a sound like the singer is "Recorded in the studio. Or concert hall". However, most people will understand that the good sound will be produced in any resolution. Vocals are clear and sharp, clear bass sound fuller.

4 section of Principle to Calibration (according to the Institute of Imaging Science Foundation "ISF").

  1. Dynamic Range: is adjusted Brightness and Contrast for the screen can display in the dark and the light was completely full potential. This is the most important part of the picture.
  2. Color Saturation: is to adjust the full freshness of color that is natural and not too fresh. We will adjust the Color and Tint.
  3. Colorimetry: The accuracy of color into two parts: 1) White Balance: To set the color temperature near 6500°K, which is the White balance, or the D65. White Balance color temperature of the reference light from the sun at noon. White is the reference that is valid in terms of white balance, not white and blue, yellow or greenish+white, etc. 2) Color Space or reference the relationship of the extent and accuracy of the RGB primary colors and secondary colors CMY.
  4. Resolution: is an adaptation Aspect Ratio or Picture Size of TV(Aspect Ratio) to display 1:1 Pixel Matching that is how many pixels are Input, Output that can be equal to the number of Input, To avoid distortion of the details and the display area.

Pre-Calibration your HDTV.

Calibration HDTV software
  1.  Digital Video Essential: Calibration CD that has high accuracy. It's very easy to use and has Pattern for adjustment and testing as well; I began to learn from this disc as well.
  2. Setup Picture Mode to be the Mode that has color temperature close to 6500°K or White Balance close to the D65. Most of the modes, Expert / Professional / Cinema / Movie / Custom. Each brand will use a different name, but you remember that you must to choose the custom mode or movie mode. The color temperature is near 6500°K. If not more than 500°K is similar to the original studio, which is an acceptable level. Including, to close the feature mode such as Dynamic Contrast / Dynamic Color / Edge Enhancement / Light Sensor. So the picture is a "stillness" in reference to "Not varied” on context and content.

The calibrated images: we need to achieve the above 4 section of Principle to Calibration.

1. Brightness: that’s mean "black level". This is the essence of calibrated image. If you ever have problems like "black dip" or " picture do not show clearly in the dark" to "black fly"is not black or real black, the lack of weight that means you adjust the Brightness is not valid.

If you adjust high Brightness; It is the color black is not black, light black and gray. If the Plasma TV models will be the grain of Noise. On the other hand, if we adjust the Brightness is too low; detail in the dark will be lost or as we call it the "black sinking".

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From the left; High-Brightness = black to gray. Mid pic; Low Brightness= black sinking. Right pic = Brightness is correct.
**Other terms used instead of Brightness such as Shadow Detail and Black Level.**


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The Brightness Test Pattern-level steps. Adjusting the Brightness of the screen until you see the black bars, left - right at 3 bar.

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The reduced levels of Brightness. Stick to the left - right (dark black) merged into the background. You can see that the two gray bars on the two sides are visible.
  • The correct brightness setting- You will see a gray bar at left-right that is the second bar only.Brightness level is where the dark black will be merged with background.
  • Too high brightness setting- The darker bar(along with left-right), it appeared that the background is not black, it’s became to be light gray.
  • The lowest brightness setting- Will affect the gray is gone; attenuation of detail in dark areas is visible more difficult. The detail in dark scenes to sink.
2. Contrast: that’s mean the contrast but the monitor is associated with "a white or light".(To adjust the brightness increased that makes contrast was increased the level of the screen to white and black), but almost all TV manufacturers pressure that the contrast is Sharpness which is exactly the wrong information.

If we adjust the Contrast is too high, detail will result in a gradient from white to all white. If we adjust the Contrast is too low, We will get the blue and white or white cloud. It’s not clear white. It's a good one, because the TV today(Excluding the Projector) can to adjust the Contrast to 100. If’s a Projector, if we adjust for Max to determine whether the image is super white, of course, because it can speed up the Contrast image brighter than the TV. So if you are adjust in the Projector Contrast must be extra careful!

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Pattern in Contrast to adjust the Contrast is the correct. While it does not affect the two white bars along the side(almost swallowed. But still a little discrimination).

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Pattern in Contrast to adjust the Contrast is High, White bars on the side will swallow it all.

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Left is correct contrast setting.  Right is high contrast which is a super white.

3. Color / Tint: Color is "good freshness" of the color as a whole. If the colors are very fresh, Over and over that make the face is red, Green grass is too wet or very fresh, as in fiction. While it would be setup a little, color is too dry or lifeless. If we cut down to 0, it immediately becomes black and white.

The Tint is the relationship between red and green. In most cases take the "skin of people" (Skin Tone) is correct. If adjustments to high (R) skin color is "red" while the lowest (G) of the skin to become "green". However, from that I have tested many brands of TV models. I must admit that Tint is set up quite well. Almost no need to edit anything. Color adjustments as we see one.

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Left- High Color: Color over the entire face of the wood and the back wall.
Color correct: Color is natural. The wood is the wood. Face of a little girl who was a natural.

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The Pattern of the DVE to test the validity of the Color.

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Primary Color Filter, try looking through the "blue box". Adjust Correct: look through Blue Color Filter to see the dark squares only 6 Boxes. The area around the ground to swallow is the same.

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The more or less adjust Correct: Notice the squares on the other. In addition to the six dark squares. The background "Do not swallow it all is blue". Tint is not a legitimate cause. "Do not swallow the whole is blue," as well.

4. Color Temperature: If we adjust the color temperature of 6500°K (K = Kelvin), we will get to the "white balance" or "White Balance" is like a studio monitor which is the director will use the image. When it's time to cut the Master.

Professional called the white balance is correct that the "D65". The number is 6500 ° K color temperature, the "sun" light at the time "Daylight". By the white light of the sun during this time is the white light that used for visual reference. We therefore used as a standard in the video industry, Digital Imaging and the relevant standards.

I have an example of "light of the lamp". Even the lighting of the lamp is different from the screen in a way. However, compared to that seen in the color temperature of white light that Other colors are different to.

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The bad news is to precisely measure the color temperature, not visible with the naked eye. It has to be in the hardware and software with a meter measured to help which is high price and quite difficult for the novice or the public. However, we were able to measure the White Balance from the screen similar to the reference. "Trick" is to select the settings in the "Color Temperature" is correct.

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Graph color temperature: reference line in the center of the Color Temperature in °K for each of the 10000°K/6500°K/4800°K/2850°K white, the color difference was obvious. However, the standard reference for the 6500°K.

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White Balance & Color Space: Tools used in reference to the White Balance and Color Space is Gamut CIE. The rectangle is the correct color video standard of the "primary colors" (Red Green Blue) and "secondary colors" (Cyan Magenta Yellow). The white dot in the middle is called. "The correct white balance" or "D65". It is too cumbersome for novice users. Below is our technique that will help you through it.
How to use Color Temperature Mode?
  • Cool: Cool tones of white to bluish. The tone is often Vivid or Dynamic mode, the bright and colorful. Color temperature is steeply at about 12000°K.
  • Neutral: neutral tones of white to slightly blue. The tone is often in a mode ready Standard (some manufacturers use the Normal or Medium). Color temperature is approximately 8000°K. I recommend this mode of "free TV".
  • Warm: Warm shades of white to red to yellow slightly. Warm color temperature is usually in standby mode; Movie / Cinema / Custom / Professional / Expert or Photo mode will be included in some brands. So this mode provide white balance and color temperature close to the industry-standard video. Color temperature will be about. 6000°K-7000°K. For ex; Sony HX925 Top models the 2011,it’s hit to at 6500°K already, ±50K only. There's nothing complicated to it. just fine with Custom mode ==>Scene==>Cinema 1, and the Color Temperature Warm 1.
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  • Resolution - Aspect Ratio or Picture Size such as the Blu-ray movie AVATAR with the original resolution at 1920 x 1080 pixels, we will do the TVis 1920 x 1080 pixel images from all over the grain. Not even a single pixel or distorted in size and the ratio is distorted. Including details not to be Crop; cutting edge is not lost.
Technical terms is called a 1:1 Pixel Matching. I have concluded with a call to the correct ratio of each brand to the following.
The proportion of picture "correct" 1:1 Pixel Matching(on the movie or use as a monitor).
LG = Just Scan
Philips = Unscaled
Panasonic = 16:9 and then to close Overscan is ”Off”
Samsung = Screen Fit
Sony = Full Pixel
Sharp = Dot by Dot
Toshiba = Native

The ratio is called "16:9" as a valid name. Many have been so much misunderstanding because The 16:9 mode is a mode that "Crop Images" at top, sides and bottom to make it 2.5% -5%edge on each side. "Little lost it".
The reason we often use as a TV brand used this mode is "Initial value" from the beginning because the edges of film and video in the past often have to write and marker that is the edges are not clean and neat.
They are set to 16:9 mode for Crop away from this edge. At the same time it is. "Zoom to full screen 16:9 mode" when viewing the content ratio(eg 4:3).

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The correct: If the ratio 1:1 Pixel Matching.the picture is not Crop even a little. Show all pixels.

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non correct: find that it lost about 2.5% -5%.(Note that the box labeled safe action 5% will fall off the edge).
  • Resolution – Sharpness: If this value is adjusted to high that make up to the edge, a notch, a rough, white or gelatin and according to Noise. If the lowest setup, we will get smooth, blurred, not sharp.
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High Sharpness: Close-up to see Pixel, Sharpness is too high.


Summary.
For a general audience to adjust the picture to help us "Answer" of "filmmaker" who wants the media to get out. In my view, is. We fully appreciate the film even more enjoyable. No distortion in the description of the missing images, including color scheme, the distortion of the original. The images will be warm by the studio to see beautiful pictures of nature. (If the director wants to convey to them). Observe that the image is as close to the cinema.

And benefits for workers on the screen directly, For example, studios need to adjust the monitor to be used for film production until Photographers and graphic designers, testers are required. "Reference standard for accuracy" through the screen.

If you consider on "The typical user". TV is used to make us happy. If the image is correct but you still feel that it is too soft. If you want to add color, add a vivid contrast. you can adjust the picture what you want. If it is a blessing to you more than ever, it is strongly recommended.

Therefore, Adherence to the principle and correct too, may be "Not respond" to be quite in practice. we recommend that you try to calibrated picture the two in both the "correct" and "desirable"before. How do you like more? How can make we happy? If we can answer this. I believe you can "Achieve happiness" of your favorite TV. But to transcend personal preferences to the "References"; We also have a "standard".
*References from: LCD Thailand.com

2 Response to "How to HDTV Calibration and Picture setting by yourself."

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Wrist man Says....

However, in the case of the Panasonic ST30, that not has Custom mode, but it is Cinema Mode, and True Cinema.
we suggest to True Cinema mode==> Color Temp - Warm. Do not forget to check Brightness, Contrast, Color and Sharpness (Over Scan - Off) values ​​are important for normal use.

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Wrist man Says....

Some one ask Where I can down load Program to test and fine-tuning?

We not recommended for use program or output Pattern from the computer to adjust the picture on HDTV (If you get a reference to the content of the video). Because of standard color space of the computer monitor will have different standard from VDO color on HDTV. The reference is to a different value.

If you want to adjust image on you TV. you should be find software that is the VDO Test Setup Disc to adjust to a better performance by play with the BD / DVD Player that you use regularly.

If you do not want to use the "DVE". you can use the "WOW" of Disney or some Blu-ray movies of the Disney / Pixar is supplied with the basic pattern (Not more accurate than WOW), Spears & Munsil, etc. However, the "DVE" is easy because you can according in my article.

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