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Camera AWB vs Professional Gray Card vs DWB Filter Comparison


 

Camera AWB

Professional Gray/White Card

Directivity White Balance Filter

Working Principle

Logical operations by camera processor. It obtained an image via the lens. Based on the received image, the camera microcomputer processor proceeds its logic operations to produce a color temperature and tint values for the scene.

Shoot RAW, then use PS or LightRoom on the image of photo card gray / white card area to decide the color temperature and tint value to calibrate the white balance of the photo..

Applying the latest Physical Optics. It uses the camera as a professional color temperature meter. Collecting the scene light in limited range to the camera sensor thru the DWB filter to compensate the camera color system with the accurate spot color temperature and tint values to restore the WHITE color.

Entity Filter?

NO

NO

Yes. It uses a patented entity filter for white balance.

Light range selection capability

Weak. The senor receives

nearly 180-degree all lights thru the front lens.

NO.Different gray cards holding angles have different levels of light pollution phenomenon.

Shielding scene for a defined range of lights reading in direction.

Light Source

Incident (same direction as the image)

Reflected light (Reverse to the image)

Incident (same direction as the image)

Logical operation results

Accurate from time to time. Minor to series errors in many scenes.

It does not use the logical calculation. But, it receives different levels of the light pollution in a colorful world.

It do not use the logical calculation, and do not produce calculation errors.

Color temperature (color) Accuracy

Could be very accurate from time to time. However, lots of miscalculation leads serious color shift.

 

Much better than AWB. A color shift would remains under the influences of the opposite light source and color pollution on gray card.

A professional final touch is required for true color works.

Easy to restore true color either for photo or video. Once, the WHITE is precisely defined, then, billion of colors could be well defined and displayed on images.

Usability

Excellent!

Very inconvenient. It needs to do post productions on computers and skillful practice with software. After that, a master art talent is required to precede the final touch for true color works.

On a new scene, it needs to use the DWB filter to do a white balance lock. For outdoor shooting, one must redo the white balance lock every 20 minutes.

Time Use

Immediately available, do not spend time.

Lots of time is required to do post production on computers.

Immediately available, do not spend time.

Power Consumption

Camera processor continues its work for AWB once the power is turned on.

It consumes processor performance and power.

Same as AWB.

The AWB function is stopped as soon as the White Balance Lock is set. Thus, it extends battery operation time and reduces camera heat as well.

Photo color performance

Sometime good color; sometime terrible color results. It is almost impossible to restore true color without using a professional gray card/white card.

Always slightly off from true color. Dropping on each point of gray card image would receive different color temperature and tint value. Which one is right? The light pollution on gray card itself makes it even worse.

Once the WHITE is defined correctly for the scene, billions of colors could be defined and displayed exactly on images. A fine Gradation and sharp image could be expected from such a photo in true color.

Video Effects

The film color shift and drift happen when the lens is shifted to another direction as the result of AWB calculation is not matching the lens movement fast enough. In addition, the film color shift happens all the time even the lens is remained still.

Shooting film in RAW is in professional job territory.

Excellent film in true color everywhere. No film color shift and drift indoor or outdoor.