Artwork has added to VLBV v1.37 the ability to convert a monochrome image into a greyscale image. Some of our customers requested this function.
Greyscale conversion is accessed through the Extract to File dialog. The file that you extract will have the greyscale properties you select.
Only TIFF BIG_TIFF and BMP output formats support greyscale output.
Sample Size
| Sample Size | Description |
|---|---|
| 1 | Monochrome Output |
| 2 | A 2x2 array of input pixels is used to compute the value of each grey pixel. |
| 4 | A 4x4 array of input pixels is used to compute the value of each grey pixel. |
| 8 | A 8x8 array of input pixels is used to compute the value of each grey pixel. |
Bits Per Pixel
It is not necessary for some of the sample sizes to use all 8 bits in a byte since they don't carry that much information. It is more efficient in terms of file size to pack two or four pixels into a single byte if you only need a few levels of grey. However, before selecting 2 or 4 bits per pixel you should also check to insure that the software or equipment receiving the greyscale image can handle more than one pixel per byte -- some cannot. In that case you should select 8 bits/pixel.
| Sample Size | 1 bit per pixel | 2 bits per pixel | 4 bits per pixel | 8 bits per pixel |
|---|---|---|---|---|
| 1 | X | |||
| 2 | X | X | ||
| 4 | X | X | ||
| 8 | X |