53 results about "Reflectance factor" patented technology

The present invention is directed to a method for producing agricultural information on an area of interest, with the information based on raw, remote imaging data that is typically produced by a sensor associated with a satellite or aircraft. In one embodiment, the method includes processing raw, remote imaging data to produce reflectance factor data on the land of interest. The reflectance factor data is then used to produce agriculturally significant information. In one embodiment, a soil zone index map is produced for the land of interest. In another embodiment, the reflectance factor data is used to produce a green vegetation index map. In yet a further embodiment, the reflectance factor data at two points in time is used to produce a map for the land of interest that indicates the change in the green vegetation index over time.

In a multi-angle calorimeter having an illumination system that illuminates a sample surface and a plurality of light receiving systems that receive reflected light therefrom, an illumination system for orientation error detection is provided that illuminates the sample surface from substantially close direction to the normal of the sample surface. Actual measured reflectance factor is corrected based on the specific approximation function obtained from the measured reflectance factor and detected orientation error.

The invention belongs to the field of detecting quality of an emulsion paint, and in particular relates to a method for rapidly detecting film coating stain resistance of an emulsion paint The method comprises the following steps of: detecting original reflectivity coefficients of a maintained coating test panel on at least three positions, and taking an average value A; completely immersing the test panel in fine linseed oil for 1min, and taking out; scratching and removing residual fine linseed oil on the surface of a paint film; scattering fly ash on the surface of a coating until the coating is completely covered; drying for 12h at temperature of 21-25 DEG C and under a relative humidity of 45-55%, and testing; adding 15L of water into the water tank of a flushing device; opening a valve to a maximum flushing sample; continuously moving the sample, so that various parts of the sample can pass through the water flow point; flushing for 1min; closing the valve, drying the sample for 30min at 48-52 DEG C; testing reflectivity coefficients of the coating sample on at least three positions, and taking an average value B; and calculating the reflectivity reduction rate of the stain resistance of the coating. The new emulsion paint film coating stain resistance detecting method disclosed by the invention can greatly shorten the detecting cycle and guarantee a stable detection result.

A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.

Above a measuring object (2), an LEDs (4) for use in light irradiation and a CMOS area sensor (8) with an image-forming lens (6) interpolated in between are installed. In order to detect the quantity of light from the LEDs (4), a photodetector (10) is further placed. A personal computer (28) carries out a linearizing process which, upon variation of the quantity of light, corrects the output of the area sensor (8) so as to make the output from the area sensor (8) proportional to the output of the photodetector (10), and a light-irregularity correction process which, when a flat plate having even in-plane density is measured as the measuring object (2), corrects the resulting output of each pixel in the area sensor (8) that has been corrected by the linearizing process to have in-plane evenness. It becomes possible to achieve a convenient two-dimensional reflection factor measuring method which does not need any mechanical driving system.

An illumination assembly is provided which is capable of correcting a color temperature. The assembly generally comprises a substrate and a light emitting device mounted on the substrate that further comprises a light emitting element and a resin containing a phosphor excitable by light emitted from the light emitting element. A reflectance factor of the substrate may be set corresponding to light emitted from the light emitting device, such that the light emitted by the light emitting device complies with a desired light emission for the illumination assembly. A translucent filling resin or translucent coating resin may further be applied on the light emitting device and the substrate, the translucent resin having a refractive index and correspondingly operable to suppress variations in color temperature. The assembly may comprise a plurality of light emitting devices having variable light color temperatures, wherein a plurality of substrate coatings may be provided having reflectance factors corresponding to the associated light color temperatures. One or more translucent resins may be applied on light emitting devices as desired to further suppress variations in color temperature.

Computer graphics methods, systems, apparatus and computer program code (software) products comprise: constructing a sparse implicit scene representation, wherein the representation is independent of geometric encoding and complexity of the input scene description, and the density of the resulting finite elements is proportional to their contribution to the final image to be generated, such that the geometric resolution of a given area of the obtained scene representation is proportional to its importance relative to the final image, wherein the constructing comprises using a Monte Carlo or quasi-Monte Carlo path tracing method to sample an adjoint importance distribution function and to shoot importons from a simulated camera into the scene, recording, for each simulated bounce, a particle i defined by selected information, the selected information comprising: 3D position p_i, surface normal n_i, and reflectance factor p_i.

The invention discloses a method and a device for acquiring the streaming potential of a nanofiltration film and relates to an analyzing method for separating the streaming potential from the measured transmembrane potential. The invention measures the transmembrane potential, pressure difference, flux and rejection rate, implements nonlinear least squares fitting on the rejection rate and the flux according to the Spiegler-Kedem equation, thus acquiring the reflectance, furthermore, pressure difference of the hierarchy is treated as the tag pressure difference when the rejection rate approaches the reflectance, and the invention implements linear fitting on the measured pressure difference which exceeds the tag pressure difference and the corresponding transmembrane potential, the size of the slope coefficient is taken as the streaming potential. The measurement device comprises a thermostatic bath, a liquid storage bath, a constant flow pump and a membranous device; wherein, the liquid storage bath is positioned inside the thermostatic bath, the constant flow pump, the liquid storage bath and the membranous device are connected with each other through nonmetallic catheters, a pressure gauge, a potentiometer and a flowmeter are connected at two sides of the membranous device. The method and the device provided by the invention can successfully separate the streaming potential from the transmembrane potential and provide data support for representing the electrical property and the separability of the nanofiltration film.

The invention relates to an optical system for measuring a retro-reflecting coefficient. The optical system comprises an illumination light source, a spectroscope, a reflector, an achromatic objective, a glass filter and a photodiode receiver, wherein the spectroscope is arranged below the illumination light source; the spectroscope, the achromatic objective, the glass filter and the photodiode receiver are arranged on the left and right sides of the illumination light source and the spectroscope respectively; the illumination light source comprises a warm white LED (Light-Emitting Diode) lamp, as well as a light source microporous diaphragm, a soft lens and a scattered light processing device, which are sequentially arranged below the warm white LED lamp; the spectroscope is a transmission and reflection type spectroscope, and is obliquely arranged below the scattered light processing device; the reflector is a reflex reflector, and comprises a large reflector and a small reflector, which are arranged in a pair. The optical system has the characteristics of small size, high accuracy, convenience in operation, variable incident angle and observation angle and the like.

The present invention provides a construction assembly for interior works, comprising:

• • prefabricated elements, preferably flat prefabricated elements e.g. gypsum fiberboards, cement fiberboards, gypsum wall boards or plaster boards, wherein said prefabricated elements comprise a coating layer formed of at least one skim coat deposited on said prefabricated elements by a coating device; and
  • at least one jointing material, e.g. a sealing coat, joint coat and/or joint pointing coat, which joints adjacent said prefabricated elements to form a substantially plane outer surface comprising the visible surface of said at least one jointing material and the visible surface of the skim coated prefabricated elements,

wherein said at least one jointing material and said at least one skim coat comprise a mineral filler, a binder and water; and wherein the composition of said at least one jointing material and said at least one skim coat are adapted to each other, whereby said at least one jointing material and said skim coat form, both in a dry state, a substantially homogeneous outer surface having over substantially all its surface at least one of the parameters comprised in the group consisting of coloration, reflectance factor and surface water absorbability which is substantially homogeneous over said surface; and whereby said outer surface is ready to be decorated. For instance, said at least one of the parameters differs by no more than 10%, preferably no more than 5%, at different parts of the overall surface, so that at least 90%, preferably at least 95%, homogeneity is achieved.

The invention discloses a method and device for estimating the soil humidity of a vegetation coverage area, and belongs to the field of electronics, information and optical remote sensing. The methodcomprises the steps: firstly constructing a relation between an overall backward reflection coefficient and DDM reflection power through the data of a satellite-borne GNSS-R reflectometer; solving a vegetation reflection coefficient and an attenuation coefficient of the vegetation coverage area by utilizing the optical image data; fusing a relationship between a satellite-borne GNSS-R reflectometer data overall backward reflection coefficient and DDM reflection power and vegetation information in the optical data, and solving a relationship between a vegetation coverage area pure soil surfacereflection coefficient and the DDM reflection power; establishing a soil humidity and DDM reflection power regression model by utilizing the actually measured data of the soil humidity of the plurality of control points; and substituting GNSS-R data DDM reflection power of a certain point into the regression equation to invert the soil humidity. The implementation of the method is effective fusionof primary satellite-borne GNSS-R reflectometer data and multispectral remote sensing data images for jointly inverting the soil humidity of the vegetation coverage area.

The invention discloses an angle domain least square reflectivity inversion method based on coherent superposition, which relates to the technical field of exploration geophysics, and comprises the following steps of: parameterizing and linearizing a wave equation by using an angle domain reflection coefficient as a reflectivity model, and constructing a linear positive operator based on Bern approximation; then, calculating the gradient of linear inversion by using an adjoint state method; and finally, updating the reflectivity model in an angle domain by using a precondition conjugate gradient method; and carrying out automatic event tracking on the reflection axis on the inverted angle domain reflectivity gather, and then carrying out coherent superposition along the tracked event to obtain a final superposition imaging result. The method has the beneficial effects that the problem of offset illusion caused by speed errors is avoided, and a deep high-quality imaging result is obtained; the sensitivity of the least square migration to the speed error is reduced, the deep-ultra deep oil gas target can be accurately imaged, and finally the practical process of the least square migration in deep oil gas exploration is promoted.

The embodiment of the invention provides an image processing method and system applied in a three-dimensional scene, the method comprises the following steps: first light source pixel information of a light source in the three-dimensional scene is determined; second light source pixel information obtained after diffuse degradation of the light emitted from the light source is determined based on the first light source pixel information and a diffuse-reflection factor from an object to the emitted light of the light source in the three-dimensional scene; and information display information of the object in the three-dimensional scene is adjusted according to the second pixel information. According to the invention, the calculation amount of the processor is greatly reduced, the performance requirements of the mobile terminal are low, even if the configuration of the mobile terminal is not high enough, frame loss cannot occur basically, and the playing process is smooth. The invention relates to the field of three-dimensional technology.

The invention discloses a metallic color anti-light projection imaging coating and a preparation method thereof. The metallic color anti-light projection imaging coating comprises a film-forming substance, a surfactant, a coloring pigment, an inorganic pigment, a high-reflective pigment, a diffuse reflection filler, an extinction diffuse reflection filler and a dispersion medium, wherein the weight ratio of the film-forming substance to the surfactant to the coloring pigment to the inorganic pigment to the high-reflective pigment to the diffuse reflection filler to the extinction diffuse reflection filler to the dispersion medium is (20-40): (5-10): (8-25): (0.1-0.9): (1-9): (5-15): (4-12): (10-35). The metal-color anti-light projection imaging coating prepared according to the technical scheme can be coated on flat wall surfaces, gypsum boards, wood boards and plastic boards by using brush coating, roll coating and spray coating processes, and by utilizing a high reflection coefficient and a diffuse reflection principle, a projection screen with high gain (2.5 or above), high brightness, high contrast, high saturation, large visual angle (the visual angle can reach 90 degrees or above) and high light resistance can be formed, and the projection screen has an excellent image imaging effect no matter in dark and semi-dark environments or bright environments.