Configuration – Images

In this section you can set raster images.

These settings are available in case you use command Timg for images transformation (correlation) or when you use command ChImg to modify images.

When raster images are transformed (correlated) in coordinates you can make the following changes over these:

- images can be saved in one of the following formats: .bmp, .jpg, .pcx, .png, .tga or .tif;

- colors format can be change as: White&Black, 16 colors, 16 gray scale, 256 colors, 256 gray scale, medium color quality 16bit, true color quality 24bit or highest color quality 32bit. Changing will be done only for decreasing quality color, increasing being pointless;

- you can choose background color in case that by transforming there will be new parts in image. Background color is use also to increase processing speed. During images processing when there is a pixel with background color, it will be ignored. If you properly choose background color for White&Black images you can get a faster processing speed.

- images can be made transparent when they are reintroduced in CAD drawing (set images Transparency = On);

- images can be made unselectable when you start program TopoLT (set CAD drawing ImageFrame = Off). This option is available only for AutoCAD;

- images can be framed (Clip) to visualize only the part from image you are interested in but without cutting from image. The part of image you are not interested in will be hidden. Framing can be made on maximum border of constraining points (points that determine the greatest area), on point’s contour (points that are nearest the image margin) or on corners (through the 4 best-positioned points relative to corners). This option is available only for AutoCAD;

- images can be cut in order to keep from image only the interest zone, cut can be made on the limit given by minimum and maximum constraining points or outside this limit with a distance (in case you want to keep from map informations about graticule, map name, etc.). Cut is useful to eliminate from raster image parts that don’t present interest achieving in this way both a shrinking of the space occupied by file and an increase of processing speed when loading the file in drawing;

Images transformation can be done by following methods: move point inside image, affine and move points, projective, polynomial conform second degree or polynomial second degree with 5 terms. You can find description of transformation formulas at command Timg.