Parc Entertainment - A Video Production Company - Birmingham, AL

SMPTE color bars

Color bars are a necessary reference tool for anyone in video production. They help technical directors, camera operators, and editors calibrate their equipment to ensure accurate color representation and consistency across cameras and monitors. Knowing how to use them is important. A few years ago, I found a great tutorial at Video University on how to adjust your video monitor using color bars. Be sure to bookmark the article for future reference.

1. Allow the monitor to warm up for a few minutes
2. Dim the room lights and block any reflections on the monitor
3. Feed color bars to the monitor either from a camera or “house bars”from your editing system
4. Set the contrast also called “picture” to its midpoint
5. Turn the chroma also called “color” all the way down until the color bars
   are shades of black and white

Next, you will need to adjust the brightness and the contrast of the image by using the three narrow bars at the bottom right.

Brightness

Notice the three narrow bars labeled 3.5, 7.5 and 11.5 on the bottom right. Adjust the brightness control until the middle (7.5 units) pluge bar is not quite visible. The lightest bar on the right (11.5 units) should be barely visible. If it’s not visible, turn the brightness up until it becomes visible.

Since 7.5 units is as dark as video gets, you should not see any difference between the left bar (3.5 units) and the middle bar (7.5 units). There should be no dividing line between these two bars. The only division you should see is between 11.5 and 7.5

Contrast

The next step is to set the contrast control for a proper white level. To do so, turn the contrast all the way up. The white (100 unit) bar will bloom and flare. Now turn the contrast down until this white bar just begins to respond.

Color

Adjust the hue of the monitor until the Yellow bar is a lemon yellow, with no shades of orange or green. Adjust the Magenta bar until you eliminate the red and the purple. If you aren’t confident in your ability to “eye-ball” these shades, consider the following:

Many professional monitors have a blue-only switch. If your monitor has one, switch it on. If your monitor does not have a blue-only switch, you can use a piece of blue lighting gel. Hold it to your eye like a viewing lens. If you see any of the red, green or yellow colors, double the blue gel over to increase the blue effect.

By using the blue-only switch or a piece of blue gel, you have removed the red and green elements of the picture. Only the blue remains. If the tint and color (also called “hue”) are correct, you should see alternating bars of equal intensity.

1. With the blue switch on (or your blue gel in front of your eye) turn the chroma or color until the grey bar at the far left and the blue bar at the far right are of equal brightness. One trick is to match either the gray or blue bar with its sub-bar.
2. Adjust the hue control until the cyan and magenta bars are also of equal brightness.
3. You can also match either of them with their sub-bars. Now the four bars - gray, blue, cyan, and magenta should be of equal intensity. The yellow, green and red (which are black in the diagram) should be completely black.

You should now have a properly adjusted video monitor. However, if flesh tones don’t look right, you may need to make further adjustments to the chroma and hue.

Understanding as much as possible about the physics of light will greatly improve your skills as a cinematographer. I recommend reading Placing Shadows as a good reference. For my location work, I normally use an Arri kit consisting of one (1) 1000 watt lamp with chimera soft box, two (2) 650 watt lamps, and one (1) 350 watt lamp. The kit comes with stands, scrims, gels, and diffusion; each accessory giving me the flexibility to manipulate the light.

The Arri kit provides great latitude in an easy-to-transport package. Recently I have also been utilizing china balls while on set. China balls are a great addition to your lighting package and they have several advantages. However, consideration must be given to the type of look you want to achieve before you decide to use them, because china balls aren’t right for every occasion.

The first thing to consider is the fact that the light coming from a china ball is difficult to trim. You’re dealing with an even and diffused light source, so you will need flags and c-stands to control how the light spills onto the scene.

Second, if you want to utilize a low-key lighting approach to your set, china balls are probably not the way to go. Since the light output is even, the contrast of the subject is reduced.

Third, china balls are difficult to gel. You can always purchase daylight balanced bulbs or tungsten bulbs to match the color temperature of your scene, but trying to color correct with gel is more challenging than using lamps with barn doors.

With these considerations in mind, china balls have some great advantages:

Light Output

China balls give you a nice, soft, diffused light source with little effort. If you want to achieve the same look with a lamp from an Arri kit, you would have to add a chimera, or diffusion, add some scrims, adjust the lens, etc. With a china ball, you can simply put it on the stand and plug it in.

Quick & Efficient

China balls are quick and easy to set up and use lower wattage bulbs. If you need to shoot a number of on-camera interviews during a grueling run-and-gun kind of day, a china ball is a great asset.

Comfortable

Since China balls use lower wattage bulbs, they don’t give off nearly as much heat as other tungsten lamps. Therefore, your talent can work under them for longer periods of time without getting too hot.

Affordable

Not everyone can invest in a Kino-Flo or Arri kit, but China balls are great because of their pricing and availability. No-budget filmmakers can grab a few of these lights, get out with their cameras and their friends, and shoot some great looking footage.

The term “virus” or “viral” has such negative connotations, and usually, for the sake of your health, you want to stay away from any kind of virus. But in the world of online marketing, you want your brand and your campaign to be viral. You want people linking to your content, retweeting your thoughts, embedding your videos. Viral marketing is all about spreading your identity across the web, increasing your exposure to the world.

The premise sounds simple enough: create compelling content that people will be inclined to pass along to others. But devising that content in a blogosphere numbering in the millions is far more tricky. On his blog, Thomas Baekdal shares his “7 Tricks to Viral Web Marketing” and posts several examples of successful campaigns, including a short online film series from BMW, called “The Hire.”

Now, I realize that not all of you have the money to invest in a campaign of this magnitude. Most likely you will need to create a concept that can be repeated quickly with minimal cost. In a post on this blog a few years ago, we discussed the success of the “Will It Blend?” campaign, whose concept could be produced over and over again, with minimal cost.

Take a look at the videos on Baekdal’s site. Maybe that will jump start your creativity as you think of ways to best market your company and services. Feel free to look through our archives for other interesting articles on utilizing video to propel your marketing campaign. And be sure to comment on your favorite viral videos and why you think they’re successful.