4. Image Operationadd chapter
4.1 Why does multiple rotating or deskewing distort the scan?add section
When rotating or straightening an image, BCS-2 changes the position of the pixels within the image. This is done either on the basis of a specified or an automatically calculated angle. The software first tries to determine the best way to improve the image. The correction angle is also calculated for automatic straightening. Once the method and angle are determined, BCS-2 deskwes the image.
Both functions influence the quality of the image of an image, since they leave traces in the image (e.g. stair formation) with every use. A larger rotation angle usually gives a better result than a smaller one. If these functions are executed multiple times, the correction angle becomes smaller with each repetition and the blurriness thus becomes larger. They should therefore only be executed once on an image if possible. If automatic deskewing or rotation does not produce the desired result, use manual deskewing.
4.2 Why Does BCS-2 Display 32-bit Colour Depth for All Colour Images, even if They Are 24-bit Colour Depth Images?add section
BCS-2 stores all images with 32-bit colour depth, regardless of whether 24-bit or 32-bit images are delivered. When the images are transferred, they are converted back into images with 24-bit colour depth. The 32-bit colour depth is distributed as follows: 8 bits for each colour channel (RGB) plus 8 bits for the alpha channel. BCS-2 adds the alpha channel and thus the additional 8 bits of colour depth to the image.
4.3 Why does BCS-2 sometimes save bitonal tiffs as greyscale tiffs?add section
BCS-2 always saves bitonal images in “greyscale” format if the “Increase/decrease contrast” function is used when editing images in BCS-2. There is no such function for bitonal images. As a workaround, we recommend first using the “Increase/decrease contrast” function and only activating binarisation immediately before transferring the job.
4.4 Why does the splitting line move to the left?add section
The splitting line only moves to the left side of the image if the operation in the When cloning selections: adjust the selections of the previous image if they do not fit in the workflow settings, Bevor the scan- Toggle masking before the scan in the Scan tab and Centre Splitlines automatically in the image context menu are activated.
In this case BCS-2 reacts as follows:
- the line is placed on the first image
- the page is split before the next scan appears -> the new images are only half the size of the original image
- in the next scan the splitline appears exactly where the centre of the split image would be.
To avoid the problem, deactivate either the function in the workflow or in the Scan tab.
