Polarized and bi-directional reflectance of corn leaves from northeast China were collected with multi-angle reflectance detection instrument in the laboratory.This instrument has the ability to measure polarized reflectance and bi-directional reflectance of targets at various viewing zenith angles

light incidence zenith angles and azimuth angles.We analyzed the relationship between polarized and bi-directional reflectance according to the geometric characters listed above

and found that bi-directional reflectance is approximate half the sum of maximum and minimum polarized reflectance.The relationship between bi-directional and polarized reflectance has a direct relation to the sensor’s viewing geometry.This study describes a new method for vegetation remote sensing detection and monitoring

and also provides a theoretical basis for further research on the relationship between polarized reflectance and bi-directional reflectance for remote sensing technology.