113results about How to "Accurate brightness" patented technology

An ambient light sensor testing module running on an information handling system verifies that an ambient light sensor managing brightness of an information handling system display is active and responding correctly. The testing module sets the display at first and second manually-selectable brightness levels and compares the brightness set from the first and second manually-selectable brightness levels when the ambient light sensor is engaged to set display brightness. An excessive difference between the brightness set by the ambient light sensor from the first and second manually-selectable brightness levels indicates a faulty ambient light sensor.

While the memory amount is reduced through minimizing correction data prepared in advance, the capability of uniformity correction can be improved, compared to a related art. Correction data for correcting display unevenness between pixels for representative pixel points is stored. Correction data for pixels except for the representative pixel points is calculated by interpolation. The representative pixel points are arranged with a higher density in a pixel region with relatively finer display unevenness.

An electronic apparatus includes unit circuits (Pmn) provided with electronic devices, data lines (Ioutm) connected to the unit circuits (Pmn), first output means (D/Aa) for outputting, as a first output, a current or a voltage corresponding to an externally supplied data signal (Mdatam), second output means (D/Ab) for outputting, as a second output, a current or a voltage corresponding to the magnitude of the first output, and selection supply means (Swa, Swb) for selecting one of or both the first output from the first output means (D/Aa) and the second output from the second output means (D/Ab) and for supplying the selected output to the data line (Ioutm). With this configuration, the image reproducibility in a low-luminance/low-grayscale display area of a display apparatus using EL devices is improved.

A multispectral imaging color measurement system, comprising a dark room, a sample platform and an imaging device for capturing said object being measured; a controllable illumination device, a filter wheel unit, an imaging signal processing unit and an electronic control unit. A method for processing imaging signals of the multispectral imaging color measurement is also proposed. The multispectral imaging color measurement system and the method for processing imaging signals thereof can overcome the inaccuracy of traditional digital imaging systems and the limits of spectrophotometer systems and provide users in the textile industry with highly accurate color measurement and evaluation.

An electronic endoscope apparatus capable of setting the brightness of a displayed spectroscopic image within a desirable range. The apparatus includes: a light source for irradiating white light on an observation target body; a first color conversion imaging the observation target image; a first color conversion circuit for converting Y/C signals to RGB three color image signals; a spectroscopic image generation circuit for generating a spectroscopic image from the RGB three color image signals; a second color conversion circuit for converting the RGB three color image signals to Y/C signals; a light amount regulation means for regulating the amount of white light irradiated on the observation target body; and a light amount control circuit for controlling the light amount regulation means based on the luminance information provided by the Y/C signals outputted from the second color conversion circuit.

The magnetic resonance imaging apparatus includes a control unit for controlling a pulse sequence that applies an RF magnetic field and a magnetic field gradient to a subject placed in a static magnetic field and detects a magnetic resonance signal generated from the subject, and a calculation unit for processing the signal, and the control unit performs the process including the steps of; (1) obtaining first images at different positions in a first direction, (2) obtaining images after the first images are subjected to correction of brightness distortion, (3) obtaining images after the images as to which the brightness distortion has been corrected are further subjected to correction of positional distortion, and (4) synthesizing by a weighting calculation, overlapping areas of the images, after the positional distortion thereof has been corrected. According to this magnetic resonance imaging apparatus, the positional distortion and the brightness distortion can be corrected upon connecting the images, in the multi-station imaging.

An observation system includes: a container holding unit; a ring illumination, including a light source in a ring shape, arranged in a position opposed to an outer bottom surface of a container so that a central axis of the illumination is aligned to that of a bottom surface of the container held by the container holding unit, when an observation target is observed; a first light-shielding plate in a ring shape, having an inner diameter capable of varying, arranged between the illumination and the container holding unit, and configured to shield light from the illumination; a lens, arranged in a position opposed to an inner bottom surface of the container held by the container holding unit, to observe the observation target; and a second light-shielding plate, having an outer diameter capable of varying, arranged in an internal space of the illumination, and configured to shield light from the illumination.

A digital still camera according to the present invention can obtain an image with appropriate brightness easily without an increase in memory capacity. The digital still camera of the present invention includes: an image-capturing unit which captures a field of object to generate an image; a photometry unit which measures a luminance of a predetermined area of the field of object; a calculating unit which calculates a ratio between a luminance value of a portion of the image captured according to the luminance measured by the photometry unit, and a target luminance value of the predetermined area, the portion corresponding to the predetermined area; and a correcting unit which corrects the image generated by the image-capturing unit according to the ratio.

The present invention provides a digital loupe device and its automatic view stabilizing method. The digital loupe device is worn or head-mounted on the operator's head via a wearable frame that is connected to a plural of axial rotation modules. A pair of lighting capture modules set on the axial rotation module is used to illuminate the target view and capture the image of the target view in order to send feedback signal. Both the lighting capture modules and axial rotation modules are electronically connected to at least one control unit. The control unit, base on the feedback signal received, moves the lighting capture modules via the axial rotation modules till the desired image of the target view is obtained. The display module connected to the wearable frame can show the captured image and information provided by the control unit.

The invention discloses a screen brightness adjusting method and device, a storage medium and electronic equipment. The method comprises the following steps: setting an integral period of an ambient light sensor; acquiring an original light sensation value detected by the ambient light sensor according to an integral period; calculating a difference value between two adjacent original light sensation values, judging whether the difference value is greater than a preset difference value or not: if so, obtaining the brightness of the current display screen, calculating a target light sensation value according to the brightness and the two adjacent original light sensation values, and adjusting the brightness of the display screen according to the target light sensation value. According to the embodiment of the invention, the original light sensation values detected by the two adjacent ambient light sensors are acquired, and the target light sensation value is calculated when the difference value of the two original light sensation values is greater than the preset value, so the ambient light detection accuracy can be improved, and the screen brightness adjustment is more accurate.

The invention provides an automatic exposure method and device. The automatic exposure method comprises the following steps: firstly, determining a main body object in a preview image; and then, forming a key photometry area only including the main body object in a preview image area. Through adoption of the automatic exposure method and device, an accuracy of brightness measurement in the key photometry area is increased during photometry in the key photometry area, so that brightness convergence in a converging process becomes more accurate; overexposure of an intelligent terminal is avoided; and better shooting experience is brought to a user.

Disclosed is an image processing apparatus, including: a comparing and detecting section for comparing two image data, which respectively obtained by nearly simultaneously reading both sides of a document, on a pixel to pixel basis and detecting a pixel, on which off-set arises, from the two image data based on a comparison result obtained by comparing the two image data; and a correcting section for correcting at least any one of brightness, hue and chroma based on information including brightness and hue of the detected pixel.

A digital image capture device and a brightness correction method thereof are described. The digital image capture device is adapted to correct the brightness value of a shot object in a digital image through the compensation of a strobe during shooting. The method includes setting a shooting magnification of the digital image capture device to the shot object; capturing a pre-shot image at least including the image of the shot object; triggering a strobe to emit a main flash onto the shot object, so as to shoot a digital image; setting a plurality of light measuring areas in the digital image; calculating a corresponding object distance of the shot object from each of the light measuring areas; establishing a shading table according to each of the object distances; and loading the shading table to adjust the brightness value of each of the light measuring areas in the digital image.

A pulse wave detection device color converts a frame image of a moving image from RBG components to YIQ components, and identifies an eye section using the eye color of a user prepared in advance with a Q component. Next, the pulse wave detection device uses the Y values of the eye section to detect the brightness of the imaging environment. Then, the pulse wave detection device detects a pulse wave signal Qm on the basis of the average of the Q-values of a skin section in the frame image, corrects a change in the brightness by subtracting from Qm the average value Ye of the Y values of the eye section, and thereby outputs a post-brightness-correction Qm. As a result, a pulse wave can be successfully detected even if the brightness is changing because the user is moving in a vehicle or the like.

A tone correcting apparatus includes: a first acquiring unit that acquires first brightness information indicating brightness of each of a plurality of block regions that are set to cover an entire area of an image; a face detecting unit that detects a face portion where a human face is positioned in the image; a second acquiring unit that acquires second brightness information indicating brightness of the face portion detected by the face detecting unit; and a correction unit that corrects brightness of the image based on the first brightness information and the second brightness information.

The display apparatus comprises: a light-emitting unit having a plurality of light sources; a display unit configured to display an image on a screen by modulating light from the light-emitting unit; a first storage unit configured to store a first brightness correction value corresponding to a first gradation level, and a second brightness correction value corresponding to a second gradation level; and a control unit configured to determine, by using the first brightness correction value and the second brightness correction value, a brightness correction value corresponding to a gradation level of a display object image data, and control, on the basis of the determined brightness correction value, the light emission brightnesses of respective light sources.

There is provided an image processing apparatus. The image processing apparatus includes: a brightness information acquisition unit configured to acquire brightness information indicating brightness of each pixel in a target image, wherein high-frequency components are eliminated from the target image; a correction magnification setting unit configured to set, for each pixel of the target image, a correction magnification based on the brightness information, wherein the correction magnification is substantially inversely proportional to the brightness of the pixel; and a gradation correction unit configured to correct the brightness of each pixel based on the correction magnification.

Inventive driving circuit and driving method of a display are provided. The driving method includes equally dividing a frame time into N divided portions, where N≧1 and N is an integer; setting two switch signals in each of the divided portions of time; and turning the OLED (6) on when a first switch signal switches the first switch tube (1) on and the second switch tube (2) receives the first digital signal, in each of the divided portions of time, and turning the OLED (6) off when the second switch signal switches the first switch tube (1) on and the second switch tube (2) receives the second digital signal. By equally dividing a frame time, a digital signal (0/1) may replace for the conventional analog signal to turn on/off an OLED based on time division. Precise control of frame brightness can be achieved for consistent OLED illuminance.

The invention discloses a liquid crystal display panel with compensable feed through effect, which comprises a plurality of groups of pixels, a grid driving circuit, a data driving circuit and a gamma voltage generator. Each group of pixels comprises a first pixel and a second pixel. The first pixel and the second pixel share one data wire, and the first and second pixels are coupled to first and second grid wires respectively. When the grid driving circuit drives the first grid wire, the data driving circuit writes data into the first pixel, and then the gamma voltage generator provides positive and negative gamma voltage to the data driving circuit. When the grid driving circuit drives the first and second grid wires at the same time, the data driving circuit writes data into the second pixel, and then the gamma voltage generator provides positive and negative gamma voltage added with compensation potential to the data driving circuit.

An image display apparatus includes: a light-emitting unit having a plurality of light sources capable of controlling emission brightness individually; a display unit that displays an image on a screen; and a control unit that controls the respective emission brightnesses of the respective light sources according to images of regions on the screen corresponding to the respective light sources. When a difference between an image of a subject frame and an image of a past frame earlier than the subject frame is caused from movement of a predetermined object, the control unit suppresses the emission brightness of a light source corresponding to an image region of the subject frame brighter than that of the past frame from changing from the emission brightness of a light source corresponding to this image region of the past frame.

The invention discloses a brightness correction method, system and equipment and a computer readable storage medium. The method comprises the steps of obtaining a detection shooting image obtained after a preset shooting equipment shoots an original detection image; determining shooting brightness attenuation information of a preset shooting equipment based on the detected brightness of the shot image; obtaining a projection shooting picture obtained after the preset shooting equipment shoots the original projection picture, wherein the original projection picture is a picture obtained after the target projection equipment projects the original detection picture; performing brightness compensation on the projection shooting image based on the shooting brightness attenuation information toobtain a projection compensation image; and determining brightness correction information of the target projection equipment based on the brightness of the projection compensation image and the original detection image, and performing brightness correction on the target projection equipment based on the brightness correction information. According to the invention, the target of performing brightness correction on the target projection equipment by means of the shot picture is realized, and the brightness correction efficiency is high. The brightness correction system and equipment and the computer readable storage medium provided by the invention also solve the corresponding technical problems.