39 results about "Spatial quality" patented technology

Picture level rate control systems, apparatuses and methods are described which indirectly control bit rate through peak signal to noise ratio (PSNR), thereby providing a stable PSNR while maintaining a given target average bit rate. In a preferred implementation, encoding is performed in conjunction with macroblock QP modulation. In this way, the picture level rate control provides stable temporal quality and the macroblock QP modulation provides stable spatial quality. By way of example, the number of bits generated in a group of pictures (GOP) is controlled by modulating the target bit allocation for a group of pictures (GOP) based on coded picture buffer (CPB) fullness. Macroblocks are encoded for each picture based on a rate-distortion model, which is modified in response to the relative fluctuation of PSNR of pictures within a group of pictures.

Techniques for evaluating the audio quality of an audio test signal are disclosed. These techniques provide a quality analysis that takes into account spatial audio distortions between the audio test signal and a reference audio signal. These techniques involve, for example, determining a plurality of audio spatial cues for an audio test signal, determining a corresponding plurality of audio spatial cues for an audio reference signal, comparing the determined audio spatial cues of the audio test signal to the audio spatial cues of the audio reference signal, and determining the audio quality of the audio test signal.

The invention discloses a method and a device for evaluating the quality of a human face image, belonging to the fields of image processing and biometric identification. The evaluation method of described human face image quality comprises obtaining the human face image to be evaluated; The human face image to be evaluated is carried out normalization processing, obtains the first human face image; Utilizes blind / no reference image spatial quality evaluation The algorithm evaluates the first human face image to obtain a first quality score representing the quality of the human face image to be evaluated; corrects the first quality score according to the brightness value and the fuzzy value to obtain a characterization The second quality score of the quality of the human face image to be evaluated, wherein the fuzzy value is one or more of the grayscale fuzzy value in the space domain, the fuzzy value in the frequency domain and the texture fuzzy value in the space domain; according to the The second quality score evaluates the quality of the face image to be evaluated. The invention not only conforms to people's way of evaluating images, but also can ensure that the evaluation results are more accurate and reliable.

The invention relates to the regional spatial quality analysis related technical field, and especially relates to a regional spatial quality analysis method. The method comprises the following steps of: meshing a region, and determining the longitude and latitude coordinate of each mesh center point; obtaining atmospheric environment monitoring data of each single time slice; determining an influence point searching range by using each mesh center point as an interpolating point; searching influence sample points in an influence point searching range by using monitoring sites as influence points, and determining the weight value of each influence sample point; performing interpolating calculation on each interpolating point by a pollutant concentration monitoring value of the corresponding influence sample point according to the corresponding weight value, so as to obtain the concentration interpolating result of the mesh center point corresponding to each interpolating point. The regional spatial quality analysis method provided by the invention is suitable for small and medium size regional air quality spatial analysis, guarantees the rapid calculation speed and the high interpolating precision, and provides accurate and visual regional pollutant spatial distribution information for the public.

The side-pumped solid-state laser source comprises a resonant cavity defined by at least two spaced-apart mirrors, an active medium of laser crystal type placed in said resonant cavity, and a pumping source, the layout of the resonant cavity, defined by the crystal and by the mirrors, being arranged to cause spatial inversion of the oscillating mode within the active medium in the absorption direction of the pumping beam, such as to symmetrize the thermal focal length seen by the oscillating mode. The laser source comprises lenses for conditioning the pumping beam emitted by the pumping source, to form on the side face of the laser crystal a pumping spot arranged to symmetrize the spatial quality of the emitted laser beam and / or active control means for the laser crystal temperature, in order to correct its undesired astigmatic effects. The pumping process for the solid-state laser source generates on the side face of the laser crystal a pumping spot arranged to symmetrize the spatial quality of the emitted laser beam, in such a manner as to correct its undesired astigmatism effects.

The invention discloses an adaptive binary image segmentation method of Chinese character inscriptions. The method is divided into four steps: (1) preprocessing by median filtering; (2) extracting red components; (3) morphological operation with Find the best background estimate; (4) Otsu segment the binary image. The invention belongs to the technical field of image segmentation of Chinese character inscriptions, which preserves the stroke features of Chinese characters and enhances the details of characters. Aiming at degraded images of historical inscriptions, the invention proposes an image binarization adaptive segmentation algorithm based on background estimation and non-uniform illumination degradation , the novelty of the proposed method lies in finding an optimal background estimate based on blind / no-reference image spatial quality assessment, and experimental results show that the method is capable of more accurate character segmentation for degenerated Chinese characters.

Providing flexible management of heterogeneous memory systems using spatial Quality of Service (QoS) tagging in processor-based systems is disclosed. In one aspect, a heterogeneous memory system of a processor-based system includes a first memory and a second memory. The heterogeneous memory system is divided into a plurality of memory regions, each associated with a QoS identifier (QoSID), which may be set and updated by software. A memory controller of the heterogeneous memory system provides a QoS policy table, which operates to associate each QoSID with a QoS policy state, and which also may be software-configurable. Upon receiving a memory access request including a memory address of a memory region, the memory controller identifies a software-configurable QoSID associated with the memory address, and associates the QoSID with a QoS policy state using the QoS policy table. The memory controller then applies the QoS policy state to perform the memory access operation.