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| author | kinuko@chromium.org <kinuko@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2013-04-17 11:04:04 +0000 |
|---|---|---|
| committer | kinuko@chromium.org <kinuko@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98> | 2013-04-17 11:04:04 +0000 |
| commit | 5fec04903efc218ec3f13f3e0f7d6d3196893061 (patch) | |
| tree | d5792c6548d2a094e2ab0a3142f7199f4db42de0 /chrome/browser/thumbnails/content_analysis.h | |
| parent | f70c93f02347ae1a0864d6a854329a815ec30dcf (diff) | |
| download | chromium_src-5fec04903efc218ec3f13f3e0f7d6d3196893061.zip chromium_src-5fec04903efc218ec3f13f3e0f7d6d3196893061.tar.gz chromium_src-5fec04903efc218ec3f13f3e0f7d6d3196893061.tar.bz2 | |
Revert 194565 "Complete (but inefficient) implementation of the ..."
> Complete (but inefficient) implementation of the image retargetting method.
>
> This CL contains:
> 1. Convolution of arbitrary channel with arbitrary kernel (convolver*).
> 2. Gaussian gradient magnitude implementation.
> 3. Image profile (X and Y projections) computations.
> 4. Otsu-like thresholding of profiles.
> 5. Image decimation.
> 6. The main routine which binds it all together.
>
> Note: 1 and 2 do work, but remain main sources of suckiness due to performance
> problems. I actively work on this. Still, I'd love to get the current state in
> to establish a baseline and for viewing pleasure of those who are interested.
>
> BUG=155269
>
> Review URL: https://codereview.chromium.org/13947013
TBR=motek@chromium.org
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@194567 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'chrome/browser/thumbnails/content_analysis.h')
| -rw-r--r-- | chrome/browser/thumbnails/content_analysis.h | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/chrome/browser/thumbnails/content_analysis.h b/chrome/browser/thumbnails/content_analysis.h deleted file mode 100644 index e65ff02..0000000 --- a/chrome/browser/thumbnails/content_analysis.h +++ /dev/null @@ -1,66 +0,0 @@ -// Copyright (c) 2013 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -#ifndef CHROME_BROWSER_THUMBNAILS_CONTENT_ANALYSIS_H_ -#define CHROME_BROWSER_THUMBNAILS_CONTENT_ANALYSIS_H_ - -#include <vector> - -#include "base/basictypes.h" -#include "third_party/skia/include/core/SkColor.h" -#include "ui/base/ui_export.h" -#include "ui/gfx/rect.h" -#include "ui/gfx/size.h" - -class SkBitmap; - -namespace thumbnailing_utils { - -// Compute in-place gaussian gradient magnitude of |input_bitmap| with sigma -// |kernel_sigma|. |input_bitmap| is requried to be of SkBitmap::kA8_Config -// type. The routine computes first-order gaussian derivative on a -// gaussian-smoothed image. Beware, this is fairly slow since kernel size is -// 4 * kernel_sigma + 1. -void ApplyGaussianGradientMagnitudeFilter(SkBitmap* input_bitmap, - float kernel_sigma); - -// Accumulates vertical and horizontal sum of pixel values from a subsection of -// |input_bitmap| defined by |image_area|. The image is required to be of -// SkBitmap::kA8_Config type. -// If non-empty |target_size| is given, the routine will use it to process the -// profiles with closing operator sized to eliminate gaps which would be smaller -// than 1 pixel after rescaling to |target_size|. -// If |apply_log| is true, logarithm of counts are used for morhology (and -// returned). -void ExtractImageProfileInformation(const SkBitmap& input_bitmap, - const gfx::Rect& image_area, - const gfx::Size& target_size, - bool apply_log, - std::vector<float>* rows, - std::vector<float>* columns); - -// Compute a threshold value separating background (low) from signal (high) -// areas in the |input| profile. -float AutoSegmentPeaks(const std::vector<float>& input); - -// Shrinks the source |bitmap| by removing rows and columns where |rows| and -// |columns| are false, respectively. The function returns a new bitmap if the -// shrinking can be performed and an empty instance otherwise. -SkBitmap ComputeDecimatedImage(const SkBitmap& bitmap, - const std::vector<bool>& rows, - const std::vector<bool>& columns); - -// Creates a new bitmap which contains only 'interesting' areas of -// |source_bitmap|. The |target_size| is used to estimate some computation -// parameters, but the resulting bitmap will not necessarily be of that size. -// |kernel_sigma| defines the degree of image smoothing in gradient computation. -// For a natural-sized (not shrunk) screenshot at 96 DPI and regular font size -// 5.0 was determined to be a good value. -SkBitmap CreateRetargettedThumbnailImage(const SkBitmap& source_bitmap, - const gfx::Size& target_size, - float kernel_sigma); - -} // namespace thumbnailing_utils - -#endif // CHROME_BROWSER_THUMBNAILS_CONTENT_ANALYSIS_H_ |