57 results about "Wavelet fusion" patented technology

The invention discloses an image enhancement algorithm based on adaptive Retinex and wavelet fusion. The algorithm comprises the following steps: firstly, performing illumination estimation on a picture by using a self-adaptive Retinex algorithm, and enhancing a reflection component to obtain a self-adaptive image; then, respectively sharpening in a frequency domain and a space domain on the basis of obtaining the self-adaptive image, namely respectively performing Gaussian high-pass filtering sharpening and improved space operator sharpening on the self-adaptive image to obtain a frequency domain sharpening image and a space domain sharpening image; and finally, dividing the adaptive image, the frequency domain enhanced image and the spatial domain sharpened image into high frequency and low frequency through wavelet transform, and respectively performing weighted fusion to obtain a final image. According to the algorithm, a relatively good enhancement effect is achieved on common images with non-uniform illumination and low-illumination images in practical application, and the algorithm can be applied to more occasions.

The invention discloses a control method of light-emitting diode (LED) illumination. The method comprises the steps: judging whether a person exists in an LED lighting space or not; when the fact that the person exists in the lighting space, driving a charge coupled device (CCD) sensor to conduct image collection on the lighting space with the person; carrying out pre-processing on multiple images collected in the same lighting space within a certain preset time period; carrying out fusion on the pre-processed multiple images through a wavelet fusion technology to obtain a fusion image; calculating an average gray-value of the fusion image, comparing the average gray-value with a preset standard value, and judging whether the average gray-value of the fusion image exceeds the preset standard value or not; and controlling an LED lamp to adjust the illumination when the average gray-value of the fusion image exceeds the preset standard value. The invention discloses a control system of the LED illumination. The situation that adjustment on the LED illumination is conducted in real time according to change of factors such as actual illumination situations of the lighting space and behavior situations of people is achieved, and energy consumption of the LED lamp is correspondingly reduced under the situation that the enough illumination is guaranteed.

The invention discloses an optimized fusion method based on fuzzy integral, in the HIS space, the intensity component of the spectrum image is decomposed with wavelet multi-layer and acquires the low frequency base band coefficients, acquires the low frequency base band coefficient by decomposing the high resolution image with multi-layer wavelet, integrates the two single factor indexes of spectrum information and space resolution are synthesized with fuzzy integral, carries on pixel fusion with iteration, and carries on character fusion to the high frequency detail of the high frequency sub-band coefficient after being decomposed with wavelet, then carries on correspondent wavelet reverse conversion to the sub-band coefficient and low frequency coefficient, and acquires the new intensity component I', then the fused image may be acquired through HIS reverse conversion. The invention combines the character of HIS fusion method and wavelet fusion method, it realizes high space resolution, and it reduces the deformation of color greatly, and it improves the spectrum information index of fused image.