Need for a Chroma key?

Green/blue screens are used for chroma keying that is to change the background of our desire post production. The blue or green best suits the purpose and so it is chosen. They are generally used in a movie, weather or a gaming industry. Blue is much softer than green and had more chroma key effects. But mostly green is used as people wish to be in blue attire and it illuminates more and so the reflection is high.

Need for a Chroma key? Chroma key is used by photographers to add more stunning creative backdrops. For example, when we have a video effect of rain ,we can utilize it as a background later after shooting the subject indoor with green screen. It paves way to implement your perspectives. Chroma key is more profitable for event and studio photographers. Amazing backdrops can be included on a wedding photography by using chroma key. In TV, actors can be made to act in front of a green screen and post production, special effects can be inserted effectively. Working of a Chroma The practice of keying is in practice since 1940's wherein the subject was photographed in foreground with masking the background and vice versa. Then they both were combined although they were two different shots. ChromaKey works on the color and this becomes disguise/ masked. The color choice of green/blue was made as they are farthest from the skin color and separation process can be made simple post production. But actually any color unrelated to the color on the foreground can be used using electronic compositing. Effective Utilization of a Chroma Key The prerequisites for a chroma keying includes a camera, light effects, chroma backdrop and a digital image to insert post production. In initial stages a green or a blue paper can be used as backdrop as it can be easily lit evenly. The light effects on the subject should be even and matching to the digital background. Light effects shouldn't show up any wrinkles, creases or shadows incase of fabric green. Light spills may cause extra work on photoshop post production. Ensure to light the environment evenly. When everything is set perfectly, we can shoot the photograph effectively. Digital modification of the Chroma Key The chroma keying can be done with conventional image processing tools to extract the green or blue backdrop and inserting the backdrop of our choice in Photoshop, Paintshop Pro, Photoshop Elements or other Paint program In Photoshop  The background has to made as layer 0 by double clicking the layer palette. From the select menu, the "color range" has to be selected and then click green or blue with the default pipette. Fine tuning can be done by clicking on the plus or minus symbols using the fuzziness slider. Finally, the invert checkbox has to be clicked. Our selection can now be used as a mask by clicking the make mask icon.

Green Screen in film making

Green screen paves way to have a personal touch with the audience by using it effectively on video production. This can be used for:

• presentation slides
• screen video
• screenshots
• photos
• animated fundamentals

People believe that extracting the green/blue color is a tedious job. But when one knows the technique, it will give an aesthetic look for our video at a competitive price. The video can be shot anywhere and the background can be replaced with quality graphics, stock photo or video elements. We need not spend on renting a stunning building or setting up a ultra modern background.

The choice of the backdrop is of our choice and test shots may be required to bring out ultimate results. When we master the chroma keying, we are sure to make good money.