111results about How to "Reduce color distortion" patented technology

A single panchromatic (Pan) image and a single multispectral (MS) image are Pan-sharpened by extracting features from the Pan image and the MS image. The features are decomposed into features without missing values and features with missing values. A dictionary is learned from the features without missing values. The values for the features with the missing values are learned using the dictionary. The MS image is merged with the Pan image including the predicted values into a merged image, and the merged image is then Pan sharpened.

The invention relates to LED secondary reflection and IGBT (insulated gate bipolar transistor) control drive technology. LED color mixing technology or white light technology and secondary optical reflection are combined to be used for color development of a shadowless lamp, wherein the LED color mixing technology includes that red LEDs, green LEDs, white LEDs and yellow LEDs are orderly arrayed, the quantity of the red LEDs, the quantity of the green LEDs, the quantity of the white LEDs and the quantity of the white LEDs are different, the proportional relation of the red LEDs, the green LEDs, the white LEDs and the yellow LEDs are instantly adjusted by a microprocessor, an approximately spectrum is integrated by the aid of focusing of optical lenses, colors of the LEDs with the primary colors are mixed via secondary optical reflection, IGBT control drive is adopted, a sensor is mounted in a light emergent direction, and LED current is controlled by a feedback circuit; and alternately, the white light technology includes that monochromatic white light LEDs are orderly arrayed, the color temperature of each monochromatic white light LED is limited within the range from 4000K to 45000K, and an approximately parallel spectrum is integrated by the aid of focusing of optical lenses and then is in secondary optical reflection. The LED secondary reflection and IGBT control drive technology has the advantages of high color developing index, low color distortion, zero pollution, low temperature and power consumption and long service life.

A method of k*k subsampling, where k is an integer greater than one, a full frame readout on a plurality of pixels arranged in rows and columns, each pixel belonging to one of at least two sets, a first set configured to sense a first value of an image parameter and a second set configured to sense a second value of the image parameter, the method including sampling signals of k pixels of at least one set in a first row to output subsampled signals, converting the subsampled signals into digital signals having a lower resolution than the full frame readout, repeating sampling and converting for k rows, and adding digital signals for the first to kth rows within the at least one set.