When working in Absolute dimensions in pixels mode, the dimensions of the resulting image in centimeters or inches will depend on its resolution. This mode can be used along with the Preserve Aspect Ratio checkbox to ensure preservation of the proportions of the target image after the resize operation.Ībsolute dimensions in pixels, centimeters or inchesīy selecting this mode, the user can specify the exact dimensions of the resulting image either in pixels, centimeters or inches. To get updated information about the target image in the rest of the Dimensions section fields, the Original px edit boxes must be filled with its original dimensions either manually or by selecting the corresponding view with the view selector. Applying the same instance to a different image will perform the same operation but using the dimensions of the new target image. In this mode, resizing is carried out by specifying a percentage of the width and heigth of the original image (the relevant parameters of the Dimensions section are then the percents of width and heigth). Regardless of the working mode, the modification of any parameter in the Dimensions section will affect the other parameters in the same row (corresponding to Width or Heigth) or even in both rows (respectively Heigth or Width) if the Preserve Aspect Ratio option is selected. The resize of a target image can be carried out mainly in three different ways: relative, absolute or force area mode. In both cases, the specified horizontal and vertical resolutions are used to calculate the cm and inch fields of the Dimensions section. Otherwise, when this chekbox is unchecked, resolution values are used for informative purposes exclusively, but they won't change the current resolution of the target image. When this checkbox is checked the resolution of the target image is effectively modified when the process is executed. The physical width and heigth of the pinted image depend on the resolution and the dimensions in pixels for instance, a 1000x1000 pixels image with a resolution of 100 pixels per inch in both axes would be printed over a square of 10x10 inches. The user can specify the horizontal and vertical resolution either in centimeters or inches. A default resolution of 72x72 pixels/inch is predefined. It is just the dimensions of a printed pixel what image resolution specifies. It is important to point out that changing the resolution of an image does not change its dimensions in pixels. The resolution is relevant when the image is imported in a page layout application, such as a word processor or a desktop edition application. The resolution of an image is used to specify its final dimensions, in inches or centimeters, when the image is to be printed. These differences are obviously less important for large images. Bear in mind that the discrete representation of digital images can lead to slight differences due to roundoff errors. When this mode is active and the width(height) is changed, the height(width) is automatically recalculated to ensure that the width:height quotient is as close as possible to the original. The aspect ratio is que quotient between image dimensions. This mode preserves the aspect ratio of the target image after the resampling operation. For detailed information on interpolation algorithms, refer to the Interpolation Algorithms documentation. Resizing or resampling an image requires the use of pixel interpolations. It is important to note that this tool performs a resizing operation on the target image, and not only a redimensioning of its canvas (for this purpose refer to the Crop or DynamicCrop tools). When no view is selected in the view selector, a default 32-bit format is considered for calculation of new dimensions. The final dimensions are calculated from the current dimensions in Original px. The text area below the edit fields provides information on the dimensions of the resulting image. The cm and inch fields depend on the resolution of the image, which can be changed in the Resolution section. In this section you can specify the new dimensions of the target image directly by entering new width and height values, either in pixels, as a percentage of the original image, in centimeters, or in inches.
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