Vivotek Inc.

Shih-Hsuan Chen

Hsiang-Sheng Wang

Chung-Yi Kao

Wei-Shiu Chen

An image calibration method applied to an image calibration device includes comparing a first image with a second image to acquire a first overlapping region of the first image and a second overlapping region of the second image, analyzing color distribution of the first overlapping region to acquire at least one first base color value, analyzing color distribution of the second overlapping region to acquire at least one second base color value, setting a ratio of the at least one first base color value to the at least one second base color value as an luminance compensation value when the at least one first base color value is greater than the at least one second base color value, and utilizing the luminance compensation value to adjust pixels of the second image. The first overlapping region is overlapped with the second overlapping region.

Image calibration method and image calibration device

A day-mode-night-mode switching method is applied to a monitoring camera apparatus or a filter switching module. The monitoring camera apparatus is electrically connected to an supplemental lighting apparatus for light compensation. The day-mode-night-mode switching method can include acquiring an equivalent exposure parameter of the monitoring camera apparatus, determining whether the equivalent exposure parameter conforms to a first mode switching condition when the monitoring camera apparatus is in a night mode, computing a light compensation exposure parameter of the monitoring camera apparatus when the equivalent exposure parameter conforms to the first mode switching condition, utilizing a compensation parameter acquired by the light compensation exposure parameter to transform the equivalent exposure parameter into a predicted exposure parameter, and switching modes of the monitoring camera apparatus according to a determination of the predicted exposure parameter and the first mode switching condition.

Day-mode-night-mode switching method and related monitoring camera apparatus

An exposure compensating method applied to a camera apparatus includes acquiring a monitoring image captured by the camera apparatus via an exposure parameter, computing an estimating exposure compensating value of the monitoring image according to a triggering threshold, analyzing continuity in pixels of the monitoring image with intensity conforming to a specific condition to acquire a weighting adjustment value of a region of interest, adjusting the estimating exposure compensating value via the weighting adjustment value to generate a final exposure compensating value, and adjusting the exposure parameter by the final exposure compensating value.

Exposure compensating method and related camera apparatus

An image analyzing method of detecting a dimension of a region of interest inside an image is applied to an image analyzing device. The image analyzing method includes positioning an initial triggering pixel unit within a detective identifying area inside the image, and assigning a first detection region via a center of the initial triggering pixel unit, positioning a first based pixel unit conforming to a first target value inside the first detection region, applying a mask via a center of the first based pixel unit to determine whether a first triggering pixel unit exists inside the mask, and utilizing a determination result of the initial triggering pixel unit and the first triggering pixel unit to decide a maximal dimension of the region of interest.

Image analyzing method and related image analyzing device

A metering compensation method for effectively increasing visibility of an image is applied to a monitoring camera apparatus. The metering compensation method includes acquiring a histogram of the image, setting a convergent target value and a minimal mapping value, utilizing the convergent target value and the minimal mapping value to set a weighting function, transforming the histogram into a weighted histogram via the weighting function for acquiring an intensity mean of the weighted histogram, and utilizing the convergent target value and the intensity mean to generate a first exposure compensation value. The first exposure compensation value can be used for determining whether to adjust an exposure parameter of the monitoring camera apparatus.

Metering compensation method and related monitoring camera apparatus

An image capturing device includes a plurality of light emitters, an image capturer, a memory and a processor. The memory stores a target brightness value. The processor controls the light emitters to emit light and controls the image capturer to capture an image. The image is divided into a plurality of areas and the light emitted by each of the light emitters corresponds to one of the areas. The processor calculates a current brightness value of each area and calculates an absolute difference between the current brightness value of each area and the target brightness value. The processor determines whether each absolute difference is larger than a first threshold. According to a determination result, the processor adjusts an exposure parameter of the image capturer or adjusts a light emitting intensity of the light emitter corresponding to the area with the absolute difference larger than the first threshold.

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Taipei, Taiwan

Shih-Hsuan Chen