Source: http://www.google.com/patents/US7469072?ie=ISO-8859-1&dq=6,125,447
Timestamp: 2015-03-02 05:48:05
Document Index: 402013397

Matched Legal Cases: ['art 1', 'art 2', 'art 3', 'Application No. 2003', 'Application No. 2003', 'Application No. 2003']

Patent US7469072 - Image processing apparatus and method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn image processing apparatus comprises an extractor for extracting a brightness component from image data; a scale converter for obtaining a distribution of the brightness component on relatively large scale; a brightness component improver for improving the distribution of the brightness component...http://www.google.com/patents/US7469072?utm_source=gb-gplus-sharePatent US7469072 - Image processing apparatus and methodAdvanced Patent SearchPublication numberUS7469072 B2Publication typeGrantApplication numberUS 10/887,817Publication dateDec 23, 2008Filing dateJul 12, 2004Priority dateJul 18, 2003Fee statusPaidAlso published asUS7650045, US20050012832, US20090080795Publication number10887817, 887817, US 7469072 B2, US 7469072B2, US-B2-7469072, US7469072 B2, US7469072B2InventorsKotaro YanoOriginal AssigneeCanon Kabushiki KaishaExport CitationBiBTeX, EndNote, RefManPatent Citations (27), Non-Patent Citations (9), Referenced by (6), Classifications (7), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetImage processing apparatus and method
For example, a method of achieving the dodging process is proposed by Daniel J. Jobson et al. in �A Multiscale Retinex for Bridging the Gap Between Color Images and the Human Observation of Scenes�, IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 6, NO. 7, JULY 1997 (hereinafter called prior art 1). In this method, a difference process between a component obtained by logarithmic transforming a digital image and a low-frequency component of the logarithmic-transformed component is performed to darken a bright component and brighten a dark component in a low-frequency area in the digital image, thereby achieving image improvement.
Besides, other methods of achieving the dodging process in the digital image process are proposed by Reinhard et al. in �Photographic Tone Reproduction for Digital Images�, acm Transactions on Graphics, JULY 2002, Vol. 21, No. 3 (hereinafter called prior art 2), and Moroney �Local Color Correction Using Non-Linear Masking�, IS&T/SID Eighth Color Imaging Conference (hereinafter called prior art 3). In each of these methods, a dodging-like effect is obtained in the digital image process by using a luminance component of a digital image and a low-frequency component thereof.
Here, Y′(x, y), Fn (x, y), wn, n and γ are respectively an output of the improved luminance component, a Gaussian function, weight between scales, a parameter representing the scale and a parameter representing the degree of improvement. Further, a symbol �*� denotes the convolution operation.
In the present invention, the method of detecting the face area from the image data is not limited to the above. That is, for example, a method proposed by Yang et al. in �Detecting Faces In Images: A Survey�, IEEE TRANSACTIONS ON PATERN ANALYSIS AND MACHINE INTELLIGENCE, VOL. 24, NO. 1, JANUARY 2002 may be applied.
In the process of the steps S104 and S108, as a value within [ ] described in the denominator of the equation (3), a bilateral filtering process proposed by Durand et al. in �Fast Bilateral Filtering for the Display of High-Dynamic-Range Images�, acm Transactions on Graphics, JULY 2002, Vol. 21, No. 3 may be applied to the luminance component. In that case, the bilateral filtering process is previously executed to the luminance component in the scale conversion process in the step S103.
In the present invention, the method of detecting the face area from the image data is not limited to the above. That is, for example, the method proposed by Yang et al. in �Detecting Faces In Images: A Survey�, IEEE TRANSACTIONS ON PATERN ANALYSIS AND MACHINE INTELLIGENCE, VOL. 24, NO. 1, JANUARY 2002 may be applied.
Moreover, in the process of the step S208, the bilateral filtering process proposed by Durand et al. in �Fast Bilateral Filtering for the Display of High-Dynamic-Range Images�, acm Transactions on Graphics, JULY 2002, Vol. 21, No. 3 may be applied to the luminance component as the value of [ ] described in the denominator of the equation (7). In that case, the bilateral filtering process is performed beforehand to the luminance component in the scale conversion process in the step S207.
In the above, the effect in the process in which the distribution, on relatively large scale, of the luminance component of the image data is used is predicted by analyzing the image data. Besides, for example, it is also possible to predict the effect in the process in which the distribution, on relatively large scale, of the luminance component of the image data is used, by using additional information of a digital camera image described in �Exchangeable Image File Format For Digital Still Camera Standard Exif Version 2.2� issued by JEITA (Japan Electronics and Information Technology Industries Association).
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2003-199122.4Japanese Office Action dated Dec. 18, 2007, in Japanese Patent Application No. 2003-199122.5Japanese Office Action dated Mar. 25, 2008, in Japanese Patent Application No. 2003-199119.6Jobson, et al., "A Multiscale Retinex for Bridging the Gap Between Color Images and the Human Observation of Scenes," IEEE Transactions on Image Processing, vol. 6, No. 7, Jul. 1997, pp. 965-976.7Moroney, "Local Color Correction Using Non-Linear Masking," IS&T/SID Eighth Color Image Conference, 2000, pp. 108-111.8Reinhard et al., "Photographic Tone Reproduction for Digital Images," acm Transactions on Graphics, vol. 21, No. 3, Jul. 2002.9Yang et al., "Detecting Faces in Images: A Survey," IEEE Transactions on Patten Analysis and Machine Intelligence, vol. 24, No. 1 (Jan. 2002).Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7961228 *Mar 13, 2008Jun 14, 2011Ricoh Company, Ltd.Imaging apparatus and method for controlling exposure by determining backlight situations and detecting a faceUS8184088 *Dec 2, 2008May 22, 2012Kabushiki Kaisha ToshibaImage display apparatus and image display methodUS8433107 *Dec 28, 2011Apr 30, 2013Arcsoft (Hangzhou) Multimedia Technology Co., Ltd.Method of enhancing a nose area of an image and related computing deviceUS8447132Dec 6, 2010May 21, 2013CSR Technology, Inc.Dynamic range correction based on image contentUS8634656Oct 13, 2010Jan 21, 2014Canon Kabushiki KaishaRecognizing objects by utilizing dictionary data and probability data determined by machine learningUS20090140975 *Dec 2, 2008Jun 4, 2009Ryosuke NonakaImage display apparatus and image display method* Cited by examinerClassifications U.S. Classification382/274International ClassificationH04N9/68, G06T5/40, G06K9/40Cooperative ClassificationG06T5/008, G06T2207/30201European ClassificationG06T5/00M1Legal EventsDateCodeEventDescriptionMay 23, 2012FPAYFee paymentYear of fee payment: 4Jul 12, 2004ASAssignmentOwner name: CANON KABUSHIKI KAISHA, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YANO, KOTARO;REEL/FRAME:015569/0163Effective date: 20040705RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services