2).Ĭoncerns about aspect ratios are a major issue in filmmaking. In certain circumstances, film footage may be cropped to change it from one aspect ratio to another, without stretching the image or filling the blank spaces with letterbox bars (fig. Neither of these formats is cropped as such, but rather they are products of highly specialized optical configurations and camera designs.Ĭropping in order to emphasize the subject: A cropping made by trimming off the top and bottom margins of a photograph, or a film, produces a view that mimics the panoramic format (in photography) or the widescreen format in cinematography and broadcasting. It is considered one of the few editing actions permissible in modern photojournalism along with tonal balance, color correction and sharpening. In telephoto photography, most commonly in avian and aviation photography, an image is cropped to magnify the primary subject and further reduce the angle of view-when a lens of sufficient focal length to achieve the desired magnification directly was not available. Cropping is one of the most basic photo manipulation processes, and it is carried out to remove an unwanted object or irrelevant noise from the periphery of a photograph, to change its aspect ratio, or to improve the overall composition. In the printing, graphic design and photography industries, cropping is the removal of unwanted areas from the periphery of a photographic or illustrated image. ![]() In photography, print, and design Ĭropped version, accentuating the subject The process of cropping is common to the photographic, film processing, broadcasting, graphic design, and printing businesses. Depending on the application, this can be performed on a physical photograph, artwork, or film footage, or it can be achieved digitally by using image editing software. The process usually consists of the removal of some of the peripheral areas of an image to remove extraneous trash from the picture, to improve its framing, to change the aspect ratio, or to accentuate or isolate the subject matter from its background. JSTOR ( October 2008) ( Learn how and when to remove this template message)Ĭropping is the removal of unwanted outer areas from a photographic or illustrated image.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. You can continue to alter them by performing a 'Reinit' on the image.This article needs additional citations for verification. In this case, the handles can not be used correctly and get deactivated. Right now changing the shape or rotation of the bounding shape is not supported but might be integrated in the future.įurthermore, a warning appears when the bounding shape is not aligned with the image. The user will be notified by a warning and the input is handled as a single label image. That can be useful if you want to extract a single image or its corresponding subvolume of the time series.Ĭropping 2D images is not supported unless the are 3D images containing only a single slice. If the checkbox 'Only crop current time step' is ticked, the xD + t image is reduced to an xD image (e.g., 3D+t -> 3D) with the current time step only. ![]() In this case, the 'time geometry' of the current time step is used. If you have an xD + t image, the whole time series (all timesteps) is cropped by default. Be careful to use this option since there is no undo action available. Assigns the value of the voxels outside of the bounding shape when 'Mask' is used.īy enabling this checkbox the image is replaced by the cropped subvolume.
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