RU2007113703A - METHOD OF ADAPTIVE SHARPNESS OF DIGITAL PHOTOGRAPHS DURING PRINTING - Google Patents
METHOD OF ADAPTIVE SHARPNESS OF DIGITAL PHOTOGRAPHS DURING PRINTING Download PDFInfo
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- RU2007113703A RU2007113703A RU2007113703/09A RU2007113703A RU2007113703A RU 2007113703 A RU2007113703 A RU 2007113703A RU 2007113703/09 A RU2007113703/09 A RU 2007113703/09A RU 2007113703 A RU2007113703 A RU 2007113703A RU 2007113703 A RU2007113703 A RU 2007113703A
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- boundaries
- sharpness
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Abstract
1. Способ адаптивного повышения резкости цифровых фотографий в процессе печати, включающего выполнение следующих этапов:изменяют размер изображения в соответствии с размером фотоотпечатка и разрешением устройства печати;оценивают степень резкости цифровой фотографии;уменьшают длину перехода на перепадах яркости;увеличивают локальный контраст;модифицируют цветовые каналы.2. Способ по п.1, отличающийся тем, что устанавливают зависимость между размерами фотоотпечатка, разрешения устройства печати и параметрами этапа оценки степени резкости, этапа уменьшения длины перехода и этапа увеличения локального контраста.3. Способ по п.1, отличающийся тем, что оценку степени резкости осуществляют путем выполнения следующих операций:вычисляют гистограммы абсолютных значений изображений границ, где изображения границ получают в результате высокочастотной фильтрации с ядрами свертки различного размера;вычисляют интеграл логарифма гистограммы границ для каждой из гистограмм;вычисляют из массива интегралов логарифма гистограммы границ признаки;принимают на основании признаков решение о степени резкости фотографии.4. Способ по п.3, отличающийся тем, что изображения границ получают в результате свертки строк исходного изображения с ядрами [1-1], [10-1], [100-1], [1000-1], [10000-1], [100000-1], [1000000-1], [10000000-1], [100000000-1], [1000000000-1] и столбцов исходного изображения с транспонированными данными ядрами.5. Способ по п.3, отличающийся тем, что для принятия решения о степени резкости фотографии вычисляют из массива интегралов логарифма гистограммы границ следующие признаки:интеграл логарифма гистограммы границ, полученных фильтром с ядром свертки 1. A method for adaptively sharpening digital photographs during the printing process, which includes the following steps: resize the image in accordance with the size of the photo print and the resolution of the printing device; evaluate the sharpness of the digital photograph; reduce the length of the transition on brightness differences; increase local contrast; modify color channels .2. The method according to claim 1, characterized in that a relationship is established between the sizes of the photographic print, the resolution of the printing device and the parameters of the step of evaluating the degree of sharpness, the step of reducing the transition length and the step of increasing local contrast. The method according to claim 1, characterized in that the degree of sharpness is estimated by performing the following operations: calculate histograms of the absolute values of the boundary images, where the boundary images are obtained as a result of high-pass filtering with convolution kernels of various sizes; calculate the logarithm integral of the border histogram for each of the histograms; calculate signs from the array of integrals of the logarithm of the histogram of the borders of the boundaries; take a decision on the degree of sharpness of the photo based on the signs. 4. The method according to claim 3, characterized in that the images of the boundaries are obtained by convolution of the lines of the original image with the kernels [1-1], [10-1], [100-1], [1000-1], [10000-1] , [100000-1], [1000000-1], [10000000-1], [100000000-1], [1000000000-1] and columns of the original image with transposed data kernels. 5. The method according to claim 3, characterized in that for making a decision about the degree of sharpness of the photograph, the following attributes are calculated from the array of integrals of the logarithm of the histogram of boundaries: integral of the logarithm of the histogram of boundaries obtained by the filter with the convolution
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Priority Applications (1)
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RU2007113703/09A RU2383924C2 (en) | 2007-04-12 | 2007-04-12 | Method for adaptive increase of sharpness of digital photographs during printing |
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RU2007113703/09A RU2383924C2 (en) | 2007-04-12 | 2007-04-12 | Method for adaptive increase of sharpness of digital photographs during printing |
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RU2007113703A true RU2007113703A (en) | 2008-10-27 |
RU2383924C2 RU2383924C2 (en) | 2010-03-10 |
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RU2007113703/09A RU2383924C2 (en) | 2007-04-12 | 2007-04-12 | Method for adaptive increase of sharpness of digital photographs during printing |
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2631521C2 (en) * | 2013-10-09 | 2017-09-25 | Кэнон Кабусики Кайся | Image processing device, image shooting device, image processing method and permanent machine-readable medium |
CN104580879B (en) | 2013-10-09 | 2018-01-12 | 佳能株式会社 | Image processing equipment, image pick up equipment and image processing method |
RU2656009C1 (en) * | 2014-10-06 | 2018-05-30 | Кэнон Кабусики Кайся | Image processing device, image survey device, image processing method and continuous automated data medium |
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