Convert Raster Files

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Convert Raster Files

Convert Raster Files

g_convert_raster_filesConvert Raster Files tool converts raster files from one image format to another. The tool can also be used to adjust the brightness of images, to transform the positions of images, to modify the background color, or to change the image orientation between landscape and portrait.

To convert raster files:

1. Select the Convert Raster Files tool.

This opens the Source files dialog, a standard dialog for selecting files.

2. Add the raster file(s) to the list of files to process and click Done.

This opens the Convert Raster Files dialog:

convert_raster_files

3. Define settings and click OK.

This converts the images and creates new files in the Output directory. A progress bar shows the progress of the process.

SETTING

EFFECT

Write as

Format of the output files. Supported file formats include: BMP, ECW compressed, GeoTIFF, JPEG, JPEG2000, Raw RGB, and TIFF. Some of the following settings depend on the selected format.

Target ratio

Compression ratio for ECW or JPEG2000 files.

Datum

Datum information that is written in the header of ECW and JPEG2000 files. Commonly used datum names can be selected by using the Select button.

Projection

Projection information that is written in the header of ECW and JPEG2000 files. Commonly used projection names can be selected by using the Select button.

Create TFW|JGW file

If on, external georeference files are created for GeoTIFF and JPEG files. The files have the extension .TFW|.JGW.

Coord system

Coordinate system information that is written in the header of GeoTIFF files. Commonly used coordinate system names and numbers can be selected by using the Select button.

Coordinates

Coordinate transformation to apply to image positions. The transformation can result in translation of position and scaling of pixel size but no rotation is supported. The list contains transformations that are defined in Coordinate transformations / Transformations category of TerraPhoto Settings.

Color depth

Defines how color values are stored in the output file: 24 bit color or Grey scale.

Rotate

Rotation applied to converted raster files:

Clockwise - 90 degree clockwise.

Counter clockwise - 90 degree counter clockwise.

180 degrees - 180 degree.

Clockwise to landscape - 90 degree clockwise if the source image has portrait orientation.

Counter clockwise to landscape - 90 degree counter clockwise if the source image has portrait orientation.

Output directory

Directory into which the converted images are stored.

Delete original files

If on, the original raster files are deleted after conversion.

Convert background color

If on, the background color is changed From RGB values To RGB values.

Overall to average of images

If on, the application computes the average brightness of all source images and adjust each converted image to that average brightness.

Fit automatically

If on, the histogram of each image is fitted automatically.

Brightness

If on, the brightness of each image is modified by adding the given values in the RGB fields to the red, green, and blue color components separately.

Contrast

If on, the contrast of each image is modified by adding the given percentage value in the By field.

Enlarge

If on, the resolution of the converted images is reduced by merging source image pixels into larger pixels. The value given in the By factor field determines how many pixels are merged horizontally and vertically.