Himax Technologies, Inc.

Ying-Han Yeh

Yun-Sheng Lin

Li-Chia Chu

Bo-Ruei Lin

A method for detecting dimension of box based on depth map includes: receiving a depth map generated by a camera, the depth map corresponds to pixels of an image including a box; performing a coordinate transformation to transform the depth map into camera coordinates of each of the pixels; dividing some of the pixels into plural blocks, each of blocks includes a number of the pixels adjacent to each other; statistically analyzing an average normal vector of each of the blocks according to the camera coordinates of the pixels of each of the blocks; classifying the blocks into plural clusters according to the average normal vector of each of the blocks; performing a plane extraction to obtain edge vectors according to plane formulas of the clusters; obtaining vertexes of the box according to the edge vectors; and obtaining a dimension of the box according the vertexes.

Method for detecting dimension of box based on depth map

A mura compensation apparatus for an organic light emitting diode (OLED) display includes a calculator and a mura compensator. The calculator is configured to calculate a non-maximum-luminance demura offset value of a pixel of the OLED display for a determined gray level on the basis of a gamma value, a maximum-luminance demura offset value of the pixel of the OLED display for a relocated gray level and a non-maximum luminance value of the OLED display. The mura compensator is configured to perform mura compensation on the pixel of the OLED display by the non-maximum-luminance demura offset value for the determined gray level.

Mura compensation method and apparatus for OLED display and electronic device

A image adjustment method applicable to a display includes: defining multiple areas on a display region of the display; obtaining statistics of grayscale of a preliminary image; determining an image type of the preliminary image according to the statistics of grayscale of the preliminary image; generating a Cumulative Distribution Function (CDF) of luminance according to the statistics of grayscale of the preliminary image; individually adjusting a backlight level for each of the areas according to the CDF and the image type of the preliminary image; and generating an output image with each of the areas being individually adjusted.

Scene-based adaptive backlight adjustment method and circuit for local dimming

A local dimming system includes a mean estimation unit that estimates a mean value of an image; a PWM gain control unit that generates a PWM gain value according to the mean value; a spatial filter that performs on a plurality of the mean values in spatial domain to enhance a plurality of the PWM gain values, thereby generating enhanced PWM gain values; a scene change detection unit that detects scene change according to a histogram mean value generated by the mean estimation unit; a temporal filter that performs in temporal domain according to the enhanced PWM gain values and a result of scene change detection, thereby generating PWM values; a light shape imitation (LSI) unit that generates luminance gain according to the PWM value; and a pixel compensation unit that performs pixel compensation on the image according to the luminance gain, thereby resulting in a compensated image.

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Tainan, Taiwan

Ying-Han Yeh