Konica Minolta Darwin VDP Software - Manual (Page 71)

Page 71 of 92
T EC - I T B a r c o d e So f t w a re R e f e re n c e
7 Image Parameters
7.1 Image Types
Applying the methods SaveImage and ConvertToStream to the object, the barcode can be
converted to a bitmap or vector format. The following image types with the corresponding
compression options (parameter
nQuality ) are available. Please keep in mind that unreadable
barcodes may be produced when creating a bitmap with low resolution (see section Error!
Reference source not found.).
7.1.1 Image Formats
Image Format Enumeration (def. value) Note
BMP eIMBmp (0)
EMF eIMEmf (1) not supported by ConvertToStream methods
EPS (Bitmap) eIMEps (2) not supported by ConvertToStream methods
GIF eIMGif (3) supported since TBarCode 7
JPG eIMJpg (4)
PCX eIMPcx (5) not supported by ConvertToStream methods
PNG eIMPng (6)
TIF eIMTif (7)
EPS (Vector) eIMPsVector (8) not supported by ConvertToStream methods
Table 26: Supported Image Types
7.1.2 Compression Modes
Image format Compression / nQuality Remark
BMP 0..1, 0 = uncompressed, 1 = compressed
EMF No compression is used
EPS Bitmap EPS: unused
Vector EPS: adjust font substitution.
With vector EPS files you can choose
between using Windows fonts (0) and
using PostScript compatible fonts (1).
JPG 0..100, 0=highest compression, worst quality, 100 =lowest
compression, best quality Value of 100 suggested, especially
for high data density
PCX Not used In ConvertToStream and ConvertTo-
StreamEx not supported
PNG PNGALLFILTERS (0) Use best filter for each row
(highest compression) To save an image in compressed
mode and additional as interlaced
file, you have to make a bit wise or
operation with the defined constants
(or simple adding the numbers).
Example: to save a file with maximum
compression and interlaced, the
quality parameter is calculated as
follows:
PNGALLFILTERS |
PNGINTERLACE
PNGINTERLACE (1) Interlace filter
PNGNOFILTER (2) No filter will be used
(fastest runtime)
PNGSUBFILTER (4) Difference filter with
adjacent pixel
PNGUPFILTER (6) Difference filter with pixel
from the previous row
PNGAVGFILTER (8) Average filter
PNGPAETHFILTER (10) Paeth filter
TIF 0.. No compression
1.. LZW *
2.. PackBits compression
3.. Group 3 1D compression (CCITT Modified Huffman RLE)
4.. Group 4 2D compression (CCITT Group 4 FAX) *
5.. CCITT Group 3 compression (= CCITT Group 4 FAX) *
7.. JPEG *
* is supported with TBarCode 7 and
higher