Is Bayer Pattern better than Pan Sharpening?
Yes! With Bayer Pattern Image Sensors, fewer cameras are needed per ground area which means that a multi camera system can cover more area and/or provide higher resolution than a Pan Sharpening solution.
Traditionally, pan-sharpening technology has been used to create the highest quality aerial images. A large monochrome image sensor is used to capture the luminosity of the area. And then color information is captured separately, with smaller secondary sensors for red, green and blue independently. A color image is then created in post processing, combining the monochrome data with the separate color data.
Pan-sharpening systems become quite complicated, with multiple cameras and lenses pointing at the same area on the ground, requiring precise calibration and synchronization.
At Phase One we have used Bayer Pattern technology for more than 25 years. Our modern technology stack empowers our customers to stay at the forefront of imaging quality, efficiency, accuracy and productivity.
The Bayer pattern image sensors we use at Phase One, have small color filters in front of the individual pixels, so we can capture color image data directly with a single camera.
With the Bayer pattern, half of the pixels have a green filter, 1/4 has a blue, and 1/4 has a red filter. When creating a color image from the Bayer data, we first extract a full resolution luminosity image.
Real world objects have real natural colors, typically containing some of both red, green and blue light. This causes a strong correlation between the Bayer pixels, so we can use all of these pixels to reconstruct the luminosity image at full native sensor resolution.
The color sensitivity of the red, green, and blue color filters of the Bayer pattern have very significant overlap, just like the vision cells of the human eye. This is a second source of correlation, helping us to even further refine the luminosity resolution and calculate the color of each individual pixel with the highest possible fidelity.
Because of the strong correlation between the Bayer pixels, we can use all of the data from all of the pixels of all three colors to recreate an image at almost full native sensor resolution, and we can do this using only one image sensor and only one lens.
Bayer pattern image sensors use a color filter array in front of the pixels to enable capturing of full RGB color images with a single sensor. The specific arrangement of the color filters in the Bayer pattern is used for almost all color image sensors across all types of applications and all image sensor sizes. Consequently, the optimal processing of Bayer pattern image data has been very thoroughly researched and modern Bayer processing algorithms are based on immense amounts of development effort from a wide range of both commercial companies and academic institutions.