Abstract: A method for increasing antioxidant content in plants, which includes: (a) placing at least one light transmissive material for adjusting or retaining light transmittance at certain wavelengths between a light source and photosynthesis receptors of the plants; and (b) passing a light emitted from the light source through the light transmissive material, wherein the light transmissive material adjusts or retains at least two of the following wavelength sections: the light transmittance at a section from 340 nm to 500 nm is 65% or less; the light transmittance at a section from 500 nm to 600 nm is 60% or less; and the light transmittance at a section from 600 nm to 850 nm is 83% or less.

Abstract: The present invention provides a method for stimulating plant growth, which comprises: (a) placing a light transmissive material for adjusting or retaining light spectrum wavelengths below 500 nm (section A), between 500˜630 nm (section B), and above 630 nm (section C) between the light and a photosynthesis receptor of the plant; and (b) providing the illuminance or photon flux density of section B lower than that of section A or section C after the light passing through the light transmissive material. The present invention also provides an apparatus and methods for computing cumulative light quantity, comprising (a) a spectrum sensing unit; (b) a spectrum multi-band setting module; (c) a cumulative light quantity computing module; (d) an information processing unit; and (e) a control unit.

Abstract: A system for measuring features of plant by plant images is provided, which includes an image display module, a measurement specifying module and a computing module. The image display module is used for displaying at least one plant image. The measurement specifying module is used for specifying at least two measurement points on each of the plant images and a relation between the measurement points. The computing module is used for calculating at least one piece of plant features of the plant image according to the specified positions of the measurement points and the relation between the measurement points.