21 results about "YCbCr" patented technology

The invention discloses a deep learning-based multimodal image fusion method for soft tissue photoacoustic / ultrasound imaging. Steps: an ultrasound-photoacoustic imaging device acquires photoacoustic and ultrasound images of human soft tissue and performs size normalization processing; an input spatial transformation module converts the images to the YCbCr space; an input pre-convolution module modifies the number of data channels; an input multi-scale feature extraction module extracts salient features from the source images; an input filter prediction module derives multi-scale filters; and an input filter fusion and adaptive enhancement module combines the input source images to obtain the final fused result. The invention has superior fusion performance compared to several traditional fusion methods and deep learning-based fusion methods, and more importantly, it exhibits excellent real-time performance. Furthermore, various modes of photoacoustic / ultrasound fusion extension experiments have verified the effectiveness of the method proposed in the invention.

The application provides a target recognition method based on a morphological recognition template matching, comprising the following steps: S1, acquiring an original image; S2, converting the original image from an RGB format to a YCBCR format, and performing a binaryzation processing on the original image in the YCBCR format to obtain a binaryzation image, and sequentially screening out pixel points greater than a first threshold value corresponding to YCBCR of various colors from the binaryzation image; S3, judging whether the distance between two pixel points is greater than a second threshold value, if yes, the two pixel points correspond to different targets, if not, the two pixel points are the same target, and a new second threshold value is generated; and S4, matching the binaryzation image with binaryzation template images of various targets, so as to determine the types of various targets existing in the binaryzation image. The application integrates the color, quantity and type of the target into one, and has small resource usage, and is suitable for simple use scenarios.

In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and / or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized. HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.

The application provides an image processing method, which comprises the following steps: removing the object shadow area in an RGB image; calculating the pixel value of an (i, j) position I ij in a YCbCr image, and then respectively calculating the average pixel values of the object shadow area and the non-object shadow area in the YCbCr image; adding the average pixel value of the object shadow area and the average pixel value of the non-object shadow area in the obtained YCbCr image to the pixel value of the Y channel image, so as to obtain the ratio r of the average object shadow pixel and the average non-object shadow pixel; then, according to the obtained r value and I ij , a new image pixel value of the non-object shadow area is calculated again, and the YCbCr image is converted into an RGB image according to the new image pixel value of the non-object shadow area, so as to obtain the RGB image of the non-object shadow area; in this way, only the liquid leakage area in the RGB image is reserved, and the accuracy of liquid leakage detection based on the YOLOv5 target detection algorithm is ensured.

The invention discloses a document image watermark adding and tampering detection method based on Chebyshev and Arnold. The watermark adding method comprises the following steps: converting a digital paper file into an image file; performing Arnold transformation on the image to obtain a scrambled image xi; converting the image xi into a Ycbcr color space, and extracting a Y channel; two-dimensional Chebyshev transformation is carried out on the Y channel; keeping coefficients greater than a set threshold value mu, and setting the rest coefficients to be zero; performing Chebyshev inverse transformation on the processed Y channel, replacing the processed Y channel into a Y channel in a Ycbcr space, converting the Y channel back to an image, and performing Arnold inverse transformation; and performing Chebyshev inverse transformation on the part of which the coefficient is smaller than a set threshold value mu, and forming encrypted global summary information by extracting noise level features. According to the method, the image storage overhead is hardly increased after the watermark is embedded, and the storage smaller than the original file in size can be obtained under partial conditions, so that the storage and transmission cost is effectively reduced.

The application provides an image fusion method and system based on a cascade attention mechanism and a neural network, and the method comprises the following steps: converting a color visible light image located in an RGB space into a YCbCr space; extracting features of the color image and an infrared image respectively and calculating attention maps of the color image and the infrared image; constructing a color fusion result through a fusion module; and converting the YCbCr space into the RGB space, so that the fused image is displayed in the RGB space. The application solves the technical problems of excessive dependence on artificial design, poor applicability and decreased visual effect.

The invention provides a deep counterfeiting identification method and device and electronic equipment, and relates to the technical field of image processing. The method comprises the following steps: acquiring video data to be recognized, and performing face screenshot on the video data to obtain a target face image; the target face image is converted to a YCbCr color space, and YCbCr features are obtained; fusing the RGB feature and the YCbCr feature of the target face image to obtain a fused feature; and inputting the fused features into a counterfeit identification model, extracting local features and global features by the counterfeit identification model, and obtaining an identification result output by the counterfeit identification model according to the local features and the global features. According to the scheme, the original image is converted into the YCbCr color space, thereby facilitating the amplification of a counterfeit clue, fusing the RGB color features with the YCbCr color features, and improving the detection precision. Meanwhile, in consideration of artifacts generated after the video is subjected to high compression, global features are concerned while local features are considered, and the recognition precision of the network is improved.

The application discloses a video stream compression and decompression method and system based on OpenMP thread nesting, adopts parallel pipeline to process video frame data, simplifies original JPEG coding, compresses RGB data into YCbCr data for transmission, adopts OpenMP thread nesting to process the compression and decompression of the video frame data in a multithreading mode under the condition that the outer thread processes the video frame data by using the parallel pipeline, effectively improves the support resolution and fluency of remote playing video, saves the engineering cost of client computing, and improves user experience.

This application discloses a method, apparatus, device, medium, and product for removing reflections from ultra-high-definition images, relating to the field of image processing technology. The method includes converting an input ultra-high-definition image in RGB format into Lab color space, YCbCr color space, and HLS color space; cross-validating an initial skin region determined based on the YCbCr color space and the initial YCbCr correction result with the HLS color space to obtain a target skin region, a YCbCr target correction result, and an HLS correction result; correcting green reflective pollution points determined by the ultra-high-definition image and the Lab color space to obtain a Lab correction result; and merging a first corrected image, a second corrected image, and a third corrected image converted from the Lab correction result, the YCbCr target correction result, and the HLS correction result to obtain a reflection-removed image. This application improves the reflection removal effect of ultra-high-definition images.

The application discloses an underwater image enhancement method and device based on adaptive color-brightness embedding and content perception. The method first converts the input image to YCbCr space for feature decoupling using a color-brightness embedding learning module, and extracts the brightness prior feature and the color prior feature respectively; then the original image features are input into the content perception backbone network composed of a shallow detail branch and a deep content branch, and the local texture and global contrast of the image are recovered through dynamic filtering and Fourier domain modulation; finally, through an explicit multi-prior fusion module, the learned physical prior is injected into the enhanced features for collaborative refinement, and the color deviation is corrected and a clear image is reconstructed. The PSNR and SSIM indicators of the application on multiple data sets are better than those of the existing advanced algorithms, which can effectively solve the color deviation, low contrast and detail blur problems of underwater images, and have very high fidelity and robustness.

The invention provides a frequency domain visual processing method, system and device based on RAW images and a medium. The method comprises the following steps: acquiring Bayer array RAW image data; according to the pixel arrangement mode of the Bayer array RAW image data, channel rearrangement processing is carried out on the RAW image data, and an RGB image is generated; segmenting the RGB image into a plurality of non-overlapped RGB image blocks; for each RGB image block, based on a preset frequency domain coefficient set, performing frequency domain transformation processing on the RGB image block to obtain a compressed RGB frequency domain feature of the RGB image block; wherein the frequency domain coefficient set is used for indicating frequency domain coordinates needing to be generated in the frequency domain transformation result; performing frequency domain color space transformation processing on the compressed RGB domain frequency domain features to generate YCbCr domain frequency domain features; performing channel splicing on the YCbCr domain frequency domain features of the RGB image blocks to form frequency domain features; and inputting the frequency domain features into a visual task processing model to generate a corresponding visual task result. According to the method, the image processing rate is improved while the task precision is ensured.

The invention discloses a double-branch defogging method and system based on a visual Mama module, and relates to the technical field of image defogging, and the method comprises the steps: obtaining a to-be-defogged image, converting the to-be-defogged image from an RGB color space to a YCbCr color space, and obtaining a YCbCr image; based on brightness channel information and chrominance channel information in the YCbCr image, respectively inputting the brightness channel information and the chrominance channel information to a brightness enhancement module and a defogging module to correspondingly obtain brightness enhancement features and chrominance enhancement features; inputting the chromaticity enhancement feature and the chromaticity channel information into a supervision attention module to obtain a chromaticity comprehensive feature; the brightness enhancement feature and the chromaticity comprehensive feature are fused and then input to an output module to obtain a defogged YCbCr image; and converting the defogged YCbCr image into a corresponding defogged RGB image, and taking the defogged RGB image as a defogged image. Therefore, accurate defogging of the image is realized, and the image quality recovery effect is improved.

The invention discloses a method for transmitting a video signal containing an Alpha channel based on a high-definition multimedia interface, a receiving method and related electronic equipment, and relates to the technical field of digital video transmission. The method applied to the electronic equipment at the transmitting end comprises the following steps: acquiring to-be-transmitted video data with an RGB color signal and an Alpha channel signal; the RGB signal is converted into a YCbCr signal containing 8 bit Y, 4 bit Cb and 4 bit Cr; respectively filling YCbCr and Alpha channel signals into exclusive bearing intervals of the RGB three channels according to a preset mapping rule and a 24-bit width requirement, and generating to-be-sent data of which the single-frame total amount, the resolution and the time sequence are consistent with those of RGB4: 4: 4; and synchronous transmission of the video data to be transmitted is realized through a single interface. According to the scheme, the RGB color signals and the Alpha channel signals are synchronously transmitted through a single interface, and data integrity and transmission compliance are guaranteed.

A method and apparatus for image encoding / decoding using the correlation between YCbCr are disclosed. According to one aspect of the present embodiment, an image decoding method for predicting and decoding a block to be decoded comprises the steps of: receiving a bit stream to generate a residual block of a chroma block; generating restored information of a luminance block corresponding to the chroma block and surrounding restored information of the luminance block; generating surrounding restored information of the chroma block; determining a scaling value and an offset value using the surrounding restored information of the chroma block and the surrounding restored information of the luminance block; applying the determined scaling value and offset value to the restored information of the luminance block to generate a predicted block of the chroma block; and generating a restored block of the chroma block based on the residual block of the chroma block and the predicted block of the chroma block.

In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and / or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized. HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.

Embodiments of the present application disclose a kind of mute image flip detection method and device.The method comprises: obtaining the image to be detected, the image to be detected includes the mute flip image of user;The RGB three channel separation of the image to be detected is carried out, and first image is obtained, first image includes R channel image, G channel image and B channel image;The image to be detected and first image are input into first model to carry out depth map prediction, and pseudo depth image is obtained;First image is input into HSV color model, and second image is obtained, first image is input into YCBCR color model, and third image is obtained;According to first image, pseudo depth image, second image and third image, determine identification detection result.By expanding the characteristic information of mute flip image and carrying out feature channel superposition processing, the problem of insufficient information load of single RGB channel image can be solved, and the accuracy of mute image flip detection is improved.

In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and / or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized. HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.

The application provides a multi-source image fusion method based on a three-discriminator generative adversarial network, which comprises the following steps: first, performing color space conversion on a visible light RGB image to obtain YCbCr, and concatenating the Y channel and a single-channel infrared image into a double-channel combined image; then inputting the combined image into a generator to obtain a single-channel fused luminance image with the same spatial size as the input image; thereafter, converting the fused luminance image as the Y channel and the CbCr channel to obtain a fused color image in RGB format; the generator is trained based on three discriminators before image fusion, the first discriminator discriminates the authenticity of the fused color image and the visible light color image, the second discriminator discriminates the authenticity of the fused luminance image and the infrared image, and the third discriminator discriminates the authenticity of the fused luminance image and the Y channel; the application can improve the problem of insufficient information expression of visible light in poor light, and solve the challenges of insufficient clarity of the fused image and weak correlation with the source image.

A method for driving an electro-optic display with multiple display pixels is provided, the method comprising receiving an image, converting the image into a YCbCr image, and processing the YCbCr image to generate a luminance image. The method further includes calculating changes in local regions of the YCbCr image to obtain a change map, and using the calculated changes to calculate an effect ratio map.

The invention discloses a vehicle-mounted screen dynamic contrast enhancement method and device, a storage medium and a computer program product, and relates to the technical field of image display, and the method comprises the steps: receiving a vehicle-mounted video signal in an RGB format, and converting the vehicle-mounted video signal in the RGB format into a vehicle-mounted video signal in a YCbCr format; performing basic display parameter adjustment and sharpening processing on brightness channel information and chrominance channel information in the vehicle-mounted video signal in the YCbCr format based on parallel logic of a field-programmable gate array to obtain a first vehicle-mounted video signal; selectively performing enhancement processing on the first vehicle-mounted video signal according to a preset user demand to obtain a second vehicle-mounted video signal; and after the second vehicle-mounted video signal or the first vehicle-mounted video signal is converted into the RGB format again, brightness and color temperature adjustment is carried out, and a dynamic contrast enhanced vehicle-mounted video signal is obtained. And the dynamic contrast effect of the vehicle-mounted screen is comprehensively improved.

The invention discloses a computer data compression and reconstruction method based on matrix decomposition, which relates to the technical field of computer data processing, and comprises the following steps: S1, color conversion and chroma down-sampling: converting an image from RGB to YCbCr so as to reduce correlation between channels, down-sampling chroma channels according to a set proportion, preferentially retaining brightness details, synchronously generating a parameter table, and performing color conversion and chroma down-sampling; recording image size, down-sampling proportion and integer boundary information; s2, block division and matrix assembly: dividing each channel into small blocks with a fixed size, flattening the small blocks into vectors, stacking the small blocks by taking the blocks as rows to form a channel-level observation matrix, retaining block indexes, setting ranks or quality factors as code rate control quantities, and writing the code rate control quantities into a parameter table; and S3, low-rank approximation of discrete perception: solving a low-rank representation that X is approximately equal to U multiplied by V transpose in a bounded integer domain, and elements of U and Vare constrained by integer boundaries, and the method has the characteristic of reducing errors.