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Crop tab

The crop tab lets you specify full automatic cropping, full manual cropping and a range of options between. Note that VueScan also lets you change these values by using the mouse on the preview image.

The crop area is displayed as a blinking dashed line (marching ants) that defines the area for subsequent VueScan operations. Position the mouse over the blinking line and drag to reposition any edge. Hold down the shift key and click and drag anywhere within the crop area to reposition the entire crop area (or drag the center of the crop area with the mouse). Click the scan tab for VueScan to display the result of the cropping automatically. The scan tab will use the data from the preview if a full scan has not yet been performed.

The area included in the crop is important in two ways. First, this is the area of the scan that will be included in the output files. Second, this area is used to calculate color balance, histogram, and other settings.

Be sure not to include the border around the edge of an image as part of the crop as this may cause these settings to be calculated incorrectly. Crop | Buffer (%) can also be used to prevent inadvertent inclusion of data outside of the desired frame in color settings.)

Crop | Crop size
Crop | X/Y size
Crop | Auto offset
Crop | X/Y offset
Crop | Multi type
Crop | Multi crop
Crop | X/Y images
Crop | X/Y spacing
Crop | X/Y padding
Crop | X/Y linked
Crop | Show multi outline
Crop | Auto rotate
Crop | Crop orientation
Crop | Lock aspect ratio
Crop | Aspect ratio
Crop | Border (%)
Crop | Buffer (%)
Crop | Preview area
Crop | Preview X/Y offset/size
Crop | Focus X/Y offset
Crop | All frames


Crop | Crop size

This option specifies the method used to determine the size of the cropped image:

Manual

Lets you enter all of the crop sizes manually. This option will also be selected if you have adjusted the crop size or position using the mouse on the preview window.

Auto

Analyzes the image and uses built-in rules to find the edges automatically. This setting works well most of the time if you want to capture the whole image.

Maximum

Sets the crop size to be the same as the size of Crop | Preview area. This is particularly useful when saving the raw scan data to files as it ensures that everything the scanner reads will be saved.

(specific sizes)

Sets the crop area to known dimensions. If a specific size is selected, the Crop | Crop orientation option will be available.

Standard Option: This option is always displayed.


Crop | X/Y size

This is the size of the image area that you are cropping. If set to zero, the entire scanned area will be used.

Standard Option: This option is displayed when Crop | Crop size is set to "Manual".


Crop | Auto offset

Setting this option will automatically offset the crop box. It will find the best placement for it to capture as much of the image as possible.

To save time when batch scanning, clear this option and Crop | Auto rotate and set Input | Lock exposure. Then when you press "Scan" it will perform a scan without additionally creating a preview.

Professional Option: This option is displayed when Crop | Crop size is set to anything except "Maximum".


Crop | X/Y offset

This is the offset in the preview area of the start of the image data.

These positions are relative to the upper left-hand corner of the preview area. See Crop | Preview area.

Standard Option: This option is displayed when Crop | Auto offset is displayed and not set.


Crop | Multi type

This option is used with 35mm film scanners to indicate that multiple 35mm film sizes should be used. If turned off, the cropping will search for only 24x36mm sizes, and if turned on, will also look for 10x13mm, 24x18mm, 28x28mm, 28x36mm, and 40x40mm.

Professional Option: This option is displayed when scanning slides with a 35mm film scanner .


Crop | Multi crop

This option is used with some flatbed scanners that have a black plastic mask that holds multiple slides or film strips. It can also be used to scan multiple snapshots on a flatbed scanner.

If set to Auto, it automatically finds the places in the preview that contain the selected type of image.

If set to Custom, you can set up the Crop | X/Y images, Crop | X/Y spacing, Crop | X/Y padding, and Crop | X/Y linked options.

If set to another option, it will use a pre-computed grid for many types of black plastic masks for each scanner. If there isn't a built-in grid for your particular scanner, it will try to guess the shape of this grid.

Standard Option: This option is displayed if the scan area is large enough to hold more than one image.


Crop | X/Y images

Set these options to set up a grid for scanning separate images. Each image within the grid can be cropped and rotated independently.

Professional Option: This option is displayed when Crop | Multi crop is set to "Custom".


Crop | X/Y spacing

These values can be set when Crop | X/Y images is set to a value greater than 1. See Crop | X/Y images.

Set the approximate width (X spacing) and height (Y spacing) of each element in the grid defined by Crop | X/Y images. For example, 8 4x6 photos on a 12x16 flatbed scanner would have X spacing of 6 inches and Y spacing of 4 inches.

Professional Option: This option is displayed when Crop | Multi crop is set to "Custom".


Crop | X/Y padding

If these values are set to 0, then the grid is centered, otherwise this is an offset to the first box in the grid.

Professional Option: This option is displayed when Crop | Multi crop is set to "Custom".


Crop | X/Y linked

This option indicates that all frames in the horizontal or vertical direction move together when one of the frames is offset. This usually indicates strip film in a horizontal or vertical orientation.

Professional Option: This option is displayed when Crop | Multi crop is set to "Custom".


Crop | Show multi outline

Turn this option off if you don't want to see the lines around the multi-crop boxes.

Professional Option: This option is displayed when Crop | Multi crop is used.


Crop | Auto rotate

Setting this option will automatically rotate the crop box. It will find the best placement for it to capture as much of the image as possible.

This option only functions when the crop box fits inside the preview area both horizonally and vertically. Some slide scanners let you put the slide in landscape or portrait mode, and this option rotates the image to either portrait or landscape orientation to match the image.

To save time when batch scanning, clear this option and Crop | Auto rotate and set Input | Lock exposure. Then when you press "Scan" it will perform a scan without additionally creating a preview.

Standard Option: This option is displayed when Crop | Crop size is set to anything except "Maximum" and when Crop | Multi crop isn't used.


Crop | Crop orientation

Use this option to control whether the size specified in the Crop | Crop size option is oriented in portrait or landscape view.

Standard Option: This option is displayed when Crop | Crop size is set to a specific size and not auto rotating, or when Crop | Crop size is set to "Auto" and Crop | Multi crop isn't used.


Crop | Lock aspect ratio

This option forces the crop box to keep a constant aspect ratio while one (or two) edges are being dragged by the mouse.

This ratio is always greater than one, and is the ratio of the longest edge to the shortest edge of the crop box.

If set to "Off", the aspect ratio isn't locked.

If set to "Image size", the aspect ratio is computed using the Output | Printed size option.

If set to "Manual", the Crop | Aspect ratio option will appear and you can manually set the aspect ratio of the crop box.

Professional Option: This option is always displayed.


Crop | Aspect ratio

If Crop | Lock aspect ratio is set to "Manual", use this option to manually set the ratio of the longest edge to the shortest edge of the crop box. For instance, if you plan on printing an image on 4x6 paper, the aspect ratio should be 1.5 (6 divided by 4).

Professional Option: This option is displayed when Crop | Lock aspect ratio is set to "Manual".


Crop | Border (%)

This instructs VueScan to enlarge the image beyond the edge of the crop box. This added border is ignored when computing the color balance of the image.

This option is useful for adjusting the size or position of the crop box that may have cut off parts of the image you want to keep. Because border will extend the effective area that is cropped, it will tend to include areas of white (or black) in the resulting image; if these parts of the image were not ignored when computing color balance, they could skew the results.

Border is a percentage relative to the dimensions of the cropped area, up to the maximum size of the preview area.

Border can also be set as a negative value in order to reduce the size of the image.

Compare this option to Crop | Buffer (%).

Professional Option: This option is always displayed.


Crop | Buffer (%)

This causes VueScan to ignore some image data just inside the edge of the crop box of the image when computing the color balance of the image. Unlike Crop | Border (%), the buffer does not affect the size of the image.

This option is useful to account for sizing or positioning errors of the crop box that incorrectly include parts of the image from its outer edges. These white or black areas can significantly skew the calculation of color balance if not ignored.

Buffer is a percentage relative to the dimensions of the image area. Because it includes a Crop | Border (%) it should always be set slightly higher than Border.

Compare this option to Crop | Border (%).

Professional Option: This option is always displayed.


Crop | Preview area

The preview area is the subset of the total scan area that gets scanned to produce a preview. This option can be set manually, set to the same as the last preview, set to the crop box, set to the default or set to the maximum possible.

Note: if you set a smaller preview area, the scanner head will move only far enough to cover that area. This can reduce the amount of time needed to scan, especially on flatbed scanners. Because the stepper motor that moves the scan head is often the factor that limits speed, it also makes sense to orient images in landscape (and set the preview area accordingly).

Professional Option: This option is always displayed.


Crop | Preview X/Y offset/size

These options describe the size of the preview area. They are relative to the upper left-hand corner of the image, negative, or slide.

Professional Option: This option is displayed when Crop | Preview area isn't set to "Maximum".


Crop | Focus X/Y offset

This option determines where the auto focus is centered. This position is displayed on the preview as a small animated box.

Film tends to curl along its length, as well as across its width in which case the focus will be slightly off as the edges of the film will be closer to the lens than the center.

To minimize this effect, position the focus point between the center of the film and its edge in both dimensions, or slightly closer to the edge to account for less depth-of-field the closer to the lens.

Professional Option: This option is displayed when the scanner is capable of focusing.


Crop | All frames

This option makes all frames use the options in this tab, instead of applying the options separately for each frame.

Professional Option: This option is displayed when using multiple frames.