コード例 #1
0
ファイル: images.py プロジェクト: josejamilena/ghiro
    def calculate_difference(preview, original_image_id):
        """Calculate difference between two images.
        @param preview: preview dict
        @param original_image_id: original image ID
        @return: difference, difference percentage
        """
        try:
            i1 = utils.str2image(get_file(original_image_id).read())
        except IOError as e:
            logger.warning("Comparer error reading image: {0}".format(e))
            return

        # Check if thumb was resized.
        if "original_file" in preview:
            i2 = utils.str2image(get_file(preview["original_file"]).read())
        else:
            i2 = utils.str2image(get_file(preview["file"]).read())

        # Resize.
        width, height = i2.size
        try:
            i1 = i1.resize([width, height], Image.ANTIALIAS)
        except IOError as e:
            logger.warning("Comparer error reading image: {0}".format(e))
            return

        # Checks.
        #assert i1.mode == i2.mode, "Different kinds of images."
        #assert i1.size == i2.size, "Different sizes."

        # Calculate difference.
        pairs = izip(i1.getdata(), i2.getdata())
        if len(i1.getbands()) == 1:
            # for gray-scale jpegs
            dif = sum(abs(p1 - p2) for p1, p2 in pairs)
        else:
            dif = sum(
                abs(c1 - c2) for p1, p2 in pairs for c1, c2 in zip(p1, p2))

        ncomponents = i1.size[0] * i1.size[1] * 3

        # Get diff percentage.
        diff_perc = int((dif / 255.0 * 100) / ncomponents)

        # Binary option.
        if diff_perc >= 15:
            diff = True
        else:
            diff = False

        return diff, diff_perc
コード例 #2
0
ファイル: images.py プロジェクト: josejamilena/ghiro
    def calculate_difference(preview, original_image_id):
        """Calculate difference between two images.
        @param preview: preview dict
        @param original_image_id: original image ID
        @return: difference, difference percentage
        """
        try:
            i1 = utils.str2image(get_file(original_image_id).read())
        except IOError as e:
            logger.warning("Comparer error reading image: {0}".format(e))
            return

        # Check if thumb was resized.
        if "original_file" in preview:
            i2 = utils.str2image(get_file(preview["original_file"]).read())
        else:
            i2 = utils.str2image(get_file(preview["file"]).read())

        # Resize.
        width, height = i2.size
        try:
            i1 = i1.resize([width, height], Image.ANTIALIAS)
        except IOError as e:
            logger.warning("Comparer error reading image: {0}".format(e))
            return

        # Checks.
        # assert i1.mode == i2.mode, "Different kinds of images."
        # assert i1.size == i2.size, "Different sizes."

        # Calculate difference.
        pairs = izip(i1.getdata(), i2.getdata())
        if len(i1.getbands()) == 1:
            # for gray-scale jpegs
            dif = sum(abs(p1 - p2) for p1, p2 in pairs)
        else:
            dif = sum(abs(c1 - c2) for p1, p2 in pairs for c1, c2 in zip(p1, p2))

        ncomponents = i1.size[0] * i1.size[1] * 3

        # Get diff percentage.
        diff_perc = int((dif / 255.0 * 100) / ncomponents)

        # Binary option.
        if diff_perc >= 15:
            diff = True
        else:
            diff = False

        return diff, diff_perc
コード例 #3
0
ファイル: images.py プロジェクト: josejamilena/ghiro
    def _get_previews(self):
        """Extract previews."""
        if len(self.metadata.get_preview_properties()) > 0:
            # Fetched previews key.
            self.results["preview"] = []

            for preview in self.metadata.get_preview_properties():
                p = AutoVivification()
                p["mime_type"] = preview.get_mime_type()
                p["size"] = len(self.metadata.get_preview_image(preview).get_data())
                p["ext"] = preview.get_extension()
                p["dimensions"] = [preview.get_width(), preview.get_height()]

                # Resize if needed, and store.
                try:
                    img = utils.str2image(self.metadata.get_preview_image(preview).get_data())
                    if preview.get_width() > 256 or preview.get_height() > 160:
                        p["original_file"] = save_file(utils.image2str(img), content_type="image/jpeg")
                    img.thumbnail([256, 160], Image.ANTIALIAS)
                    p["file"] = save_file(utils.image2str(img), content_type="image/jpeg")
                except Exception as e:
                    logger.warning("Error reading preview: {0}".format(e))
                    continue
                finally:
                    # Save.
                    self.results["preview"].append(p)
コード例 #4
0
ファイル: images.py プロジェクト: josejamilena/ghiro
    def _get_previews(self):
        """Extract previews."""
        if len(self.metadata.get_preview_properties()) > 0:
            # Fetched previews key.
            self.results["preview"] = []

            for preview in self.metadata.get_preview_properties():
                p = AutoVivification()
                p["mime_type"] = preview.get_mime_type()
                p["size"] = len(
                    self.metadata.get_preview_image(preview).get_data())
                p["ext"] = preview.get_extension()
                p["dimensions"] = [preview.get_width(), preview.get_height()]

                # Resize if needed, and store.
                try:
                    img = utils.str2image(
                        self.metadata.get_preview_image(preview).get_data())
                    if preview.get_width() > 256 or preview.get_height() > 160:
                        p["original_file"] = save_file(
                            utils.image2str(img), content_type="image/jpeg")
                    img.thumbnail([256, 160], Image.ANTIALIAS)
                    p["file"] = save_file(utils.image2str(img),
                                          content_type="image/jpeg")
                except Exception as e:
                    logger.warning("Error reading preview: {0}".format(e))
                    continue
                finally:
                    # Save.
                    self.results["preview"].append(p)