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Fast color correction using principal regions mapping in different color spaces

Maojun Zhang, Nicolas D. Georganas
2004 Real-time imaging  
The average color values of principal regions are used to construct the low-degree (up to degree two) polynomial mapping functions from the source images to the corrected images.  ...  In order to increase the running speed of color correction and reduce the out-of-gamut color pixels, we introduce the selection of principal regions.  ...  Experiments show that the principal regions mapping in decorrelated color spaces presents better performance.  ... 
doi:10.1016/j.rti.2003.11.001 fatcat:zoxniyemgjh2biakv5qexv3egq

Performance evaluation of color correction approaches for automatic multi-view image and video stitching

Wei Xu, Jane Mulligan
2010 2010 IEEE Computer Society Conference on Computer Vision and Pattern Recognition  
Many different automatic color correction approaches have been proposed by different research communities in the past decade.  ...  In this paper we evaluate the performance of color correction approaches for automatic multi-view image and video stitching.  ...  s work [36] using the principal regions mapping to estimate M where the highest peaks in the hue histogram are designated as principal regions.  ... 
doi:10.1109/cvpr.2010.5540202 dblp:conf/cvpr/XuM10 fatcat:fnvluguxzbgb5kas2ipzej6dbi

Compare various Circuits Area Reduction using Genetic Algorithm and Hybrid Partitioning Algorithm

2019 International Journal of Advanced Trends in Computer Science and Engineering  
In the past few years, many approaches were put forwarded to developvisibility of underwater pictures by removing haze and some color correction techniques are introduced to improve the perception of underwater  ...  Also due to the selective absorption of color components of light by the medium, images suffer from color imbalance which causes one particular color to dominate among others.  ...  Bright channel was used to segment the images into regions of different illumination.  ... 
doi:10.30534/ijatcse/2018/09762018 fatcat:qjo5qthvtncntpvfy2rjeopkxa

Dissecting and Reassembling Color Correction Algorithms for Image Stitching

Fabio Bellavia, Carlo Colombo
2018 IEEE Transactions on Image Processing  
The above color correction methods were tested on three different existing datasets, including both real and artificial color transformations, plus a novel dataset of real image pairs categorized according  ...  then reassembled in a combinatorial way to originate about one hundred distinct color correction methods, most of which never considered before.  ...  Color histogram peaks can also be used to define image 'principal regions' [23] , modeling a polynomial mapping function between corresponding color histogram peaks of the input images.  ... 
doi:10.1109/tip.2017.2757262 pmid:28961113 fatcat:o5tdypdufbb4fic4l4up7pmdiu

Color correction for onboard multi-camera systems using 3D Gaussian Mixture Models

Miguel Oliveira, Angel D. Sappa, Vitor Santos
2012 2012 IEEE Intelligent Vehicles Symposium  
Regions are used to compute local color correction functions, which are then combined to obtain the final corrected image.  ...  The current paper proposes a novel color correction approach for onboard multi-camera systems. It works by segmenting the given images into several regions.  ...  The color correction procedure will make use of NG color transfer functions, each one corresponding to a match between a region in the target with a region in the source image.  ... 
doi:10.1109/ivs.2012.6232141 dblp:conf/ivs/OliveiraSS12 fatcat:f3zujwni5ndz3elp2odsabrvqa

In vivo mapping of the fast and slow diffusion tensors in human brain

Chris A. Clark, Maj Hedehus, Michael E. Moseley
2002 Magnetic Resonance in Medicine  
Maps depicting the principal direction of the slow tensor indicated alignment with the fast tensor and the known orientation of the WM pathways. Magn Reson Med 47:623-628, 2002.  ...  Diffusion tensor imaging (DTI), which provides information about tissue structure and orientation, typically uses b values up to 1000 s mm -2 so that the signal is dominated by the fast diffusing fraction  ...  However, a difference in the appearance of the fast and slow tensor color maps is the assignment of color in the cortex, due to its high value of slow FA.  ... 
doi:10.1002/mrm.10118 pmid:11948721 fatcat:athocnnjcjdnpa25esxpipddeq

When Color Constancy Goes Wrong: Correcting Improperly White-Balanced Images

Mahmoud Afifi, Brian Price, Scott Cohen, Michael S. Brown
2019 2019 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)  
Using this dataset, we introduce a k-nearest neighbor strategy that is able to compute a nonlinear color mapping function to correct the image's colors.  ...  manipulations that make it challenging to correct the image's colors in post-processing.  ...  Color Transformations Another topic related to our work is color transformations that are used to map an input image's color space to some desired target color space.  ... 
doi:10.1109/cvpr.2019.00163 dblp:conf/cvpr/AfifiPCB19 fatcat:ha72bko2ejdkvmvii3zfcwfbly

Disparity map generation for color image using TOF depth camera

Yun-Suk Kang, Yo-Sung Ho
2011 2011 3DTV Conference: The True Vision - Capture, Transmission and Display of 3D Video (3DTV-CON)  
We propose an effective method for disparity map generation for a color image using a time-of-flight (TOF) depth camera.  ...  Then, by applying the averaging operation in each segment, we obtain the disparity map. Experimental results show the correct and stable disparity maps, compared to stereo matching results.  ...  With these data, we generated the correct disparity maps. Since we did not use the stereo matching process, the proposed method is simple and fast.  ... 
doi:10.1109/3dtv.2011.5877172 fatcat:qln725zkdffwhoinsu5xhv2yhy

MURAL LINEAR FEATURE ENHANCEMENT ALGORITHM COMBINING SEMI-SUPERVISED IMAGE SEGMENTATION AND DIMENSIONALITY REDUCTION

S. Lyu, J. Mao, M. Hou
2021 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The results show that the spatial information and the spectral information of different pattern areas in the hyperspectral image can be fully used by combining the superpixel FCM image segmentation algorithm  ...  The hyperspectral images of some murals in Qutan Temple, Qinghai Province, China were used to verify the method.  ...  In this way, the original data is mapped to the feature space through the kernel mapping function and the corresponding linear operation is performed in the feature space.  ... 
doi:10.5194/isprs-archives-xlvi-m-1-2021-423-2021 fatcat:2uzipumqtvgijntgqadimk7som

A Survey of Color Mapping and its Applications [article]

H. S. Faridul, T. Pouli, C. Chamaret, J. Stauder, A. Tremeau, E. Reinhard
2014 Eurographics State of the Art Reports  
Methods for recoloring images have often appeared under the labels of color correction, color transfer or color balancing, to name a few, but their goal is always the same: mapping the colors of one image  ...  Color mapping or color transfer methods aim to recolor a given image or video by deriving a mapping between that image and another image serving as a reference.  ...  Different color corrections methods can be used in this case, including color mapping, color transfer or color balance.  ... 
doi:10.2312/egst.20141035 fatcat:fb36wq4zmzhfvmiapw3jfguoci

Flash Lighting Space Sampling [chapter]

Matteo Dellepiane, Marco Callieri, Massimiliano Corsini, Paolo Cignoni, Roberto Scopigno
2009 Lecture Notes in Computer Science  
The correction space can be calculated once in a lifetime using a quite fast acquisition procedure; after 3D spatial calibration, obtained color correction function can be applied to every image where  ...  In this paper we present a color correction space which, given some information about the geometry of the pictured scene, is able to provide a space-dependent correction of each pixel of the image.  ...  This work was partially funded by EU IST IP 3DCO-FORM and Tuscany Regional Project STArT.  ... 
doi:10.1007/978-3-642-01811-4_20 fatcat:6mo4vonk7feinhbaqakbtdvayi

Color quantization of images

M.T. Orchard, C.A. Bouman
1991 IEEE Transactions on Signal Processing  
the color space.  ...  This color quantization problem is considered in two parts: the selection of an optimal color palette and the optimal mapping of each pixel of the image to a color from the palette.  ...  The advantage of an image-dependent palette is that quantization values are densely spaced only in regions of the color space with significant numbers of pixels.  ... 
doi:10.1109/78.107417 fatcat:a7cbwehkwfbxrjidfpv2vpxtai

Error Correction for Time-of-Flight Images Using Validity Classification

Yunseok Song, Yo-Sung Ho
2018 IS&T International Symposium on Electronic Imaging Science and Technology  
ToF distance error region is estimated by comparing the captured ToF image with warped ToF image from the neighboring ToF camera. The distance values in the error region are replaced.  ...  The performance is analyzed by evaluating a synthetic image which is generated by the depth map result.  ...  Distance Correction Using Valid Neighbors After determining which regions to apply distance correction, 3×3 filtering is applied to them.  ... 
doi:10.2352/issn.2470-1173.2018.13.ipas-464 fatcat:epdztsfafrhyhpar5dy3aohonm

DETERMINING REFLECTANCE SPECTRA OF SURFACES AND CLOUDS ON EXOPLANETS

Nicolas B. Cowan, Talia E. Strait
2013 Astrophysical Journal Letters  
Principal component analysis is used to determine an appropriate number of model surfaces with which to interpret the data.  ...  We use a Markov Chain Monte Carlo to determine best-fit parameters and their uncertainties.  ...  The MCMC sequentially takes seven 1D steps along each principal color for each surface spectrum (n surf × n λ = 21 steps), and a 3D step in map space for each longitudinal slice of the planet, normalized  ... 
doi:10.1088/2041-8205/765/1/l17 fatcat:cemmctvjafcf7ekcrk6jhchuai

An Analysis on Entity Recognition and Existence of Images in Video [chapter]

Maheswari M, Josephine M S, Jeyabalaraja V
2020 Advances in Parallel Computing  
The aim of this paper is to investigate and assess the distinctive strategies that are used in item tracking and detection through the usage of video sequences.  ...  Human visual system is speedy, correct and performs complicated tasks like identifying multiple entities and spot obstacles. An Entity is referred as an object.  ...  Color noise is produced digital camera and the flicker of lights.This color noise is eliminated by Color Space reduction method.Image-and Color-space reduction is used for background subtraction which  ... 
doi:10.3233/apc200166 fatcat:mnx7jvztargrzcmcscrw6ldp4i
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