40 results about "Light Adaptations" patented technology

There is provided a method of boosting a local dimming signal. In the method, it is determined whether or not local dimming signals, which are applied for individually driving light source blocks per frame, satisfy boosting conditions. Then, a predetermined local dimming signal corresponding to at least one of the light source blocks is boosted to a reference luminance value when the local dimming signals continuously satisfy the boosting conditions, and the boosting luminance of the predetermined local dimming signal at the reference luminance value is gradually decreased after a light adaptation time of an observer's eye. When the luminance of light source blocks that are boosted is gradually decreased before the light adaptation time or luminance of light source blocks that will be boosted is gradually increased to the light adaptation time, power consumption required to boost the light source blocks may be decreased.

The invention discloses an intelligent lighting system and method for an expressway tunnel. The invention can intelligently control the illumination brightness of the lamp group in the expressway tunnel in real time according to the actual illumination and its change of the environment outside the tunnel exit entrance, so that the driver can When passing through the tunnel, the eyes can gradually adapt to the obvious light and dark changes inside and outside the tunnel, shorten the time for dark adaptation and light adaptation, improve the driver's sight distance, reduce the stimulation of sudden changes in light brightness to the driver, and ensure the traffic safety of expressway tunnels .

The invention discloses a method of achieving fast driving of an area array charge coupled device (CCD) by means of inductive charge accumulation. The method comprises the steps that model parameter setting is carried out according to imaging requirements; an area array CCD driving schedule is generated; the area array CCD enters into an integration phase and inductive charges are generated; the integration phase ends and the inductive charges are transferred to a storage area; the area array CCD enters into the next integration phase; the inductive charges are transferred to a horizontal shifting register; the inductive charge accumulation is carried out by repeating the previous operation according to a given parameter; the horizontal shifting register outputs a line of inductive charges; the previous operation is repeated according to the given parameter until inductive charges of one frame of images are all output; and output of the next frame of images is carried out by repeating the fourth step to the ninth step. According to the method of achieving the fast driving of the area array CCD by means of the inductive charge accumulation, fast output of inductive charges of the area array CCD is achieved by means of the model parameter setting under the circumstance that external imaging environment changes, and the light adaptation range of the area array CCD can be widened greatly.

The invention discloses a light adaptation human skin colour detection method in the model identification and image processing technical field. The method disclosed in the invention comprises the following steps of: collecting a training database; using the training database to train a basal skin colour model and a light model; using the basal skin colour model to screen pixels of an image to be detected; finding out a light model closest to the image to be detected from the light model; using the model to correct the image to be detected and the basal skin colour model; and outputting the corrected image to be detected after being detected by the basal skin colour model. By means of the invention, the light component in a skin colour region in the image to be detected is obviously improved; the detection precision is improved; the accuracy of the skin colour detection is improved; and the noise interference is reduced.

A method of compensating an image based on light adaptation, a display device using the method, and an electronic device are disclosed. In one aspect, the method includes the steps of: determining a degree of light adaptation based on the amount of long-wavelength light in the lighting environment at which the image is displayed; The image data used to realize the image is converted via the CIE-XYZ color space into image data expressed in the CIE Long-Medium-Short (LMS) color space; the degree of light adaptation is applied to the converted image data expressed in the CIE-LMS color space, to generate compensated image data; and converting the compensated image data expressed in the CIE-LMS color space into image data to be displayed in the CIE-RGB color space via the CIE-XYZ color space.

The invention provides a method for confirming actinic light intensity in chlorophyll fluorescence induction curve measurement, which comprises the following steps of: obtaining plant leaf blades, shading environment light, setting multiple light intensity gradients, irradiating for a preset time with each light intensity gradient and measuring practical photosynthetic efficiency and relative electron transmission rate; drawing a response curve of the relative electron transmission rate, which is changed along the light intensity and fitting the response curve to obtain semi-saturated light intensity; taking the semi-saturated light intensity as the actinic light intensity for measuring the chlorophyll fluorescence induction curve; calculating a difference value between a maximal fluorescence value after light adaptation and a practical fluorescence value and a difference value between a maximal fluorescence value after dark adaptation and a basic fluorescence value after dark adaptation, and calculating the ratio of the two difference values; judging if the ratio is in a preset range, if so, confirming the current light intensity as the actinic light intensity, and if the ratio is less / more than the lower limit / the upper limit of the preset range, reducing / increasing the light intensity, re-measuring the chlorophyll fluorescence induction curve and calculating the ratio. The method can measure typical chlorophyll fluorescence induction curve.

The invention discloses a head-mounted display device and an outdoor visual method using the head-mounted display device. The disclosed device includes a battery, an environmental sensor, a camera, a processing card, an optical machine and an optical adaptation cover. The battery, the environmental sensor , camera, processing card, optical machine and light adaptation cover are all installed on the body, the battery is arranged at the rear end of the body to supply power to the camera, processing card and light machine, and the environmental sensor, camera, light machine and light adaptation cover are arranged on the body The front end of the front end, the environmental sensor, the camera, and the optical machine are all connected to the processing card through cables, and the environmental sensor and the optical machine are also connected through cables. The light adaptation cover is composed of photochromic film and plexiglass. The environmental sensor, camera The and light machine is located inside the light adaptation cover. It can adapt to the light intensity of the outdoor environment.