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# 08. Import from image

On selecting this menu option, the window shown below is opened:

Image converter tool before loading image

Click on the "Open image" button. A file selection dialog appears. By default PNG images are selected but you can also load BMP or SVG files.

Images must have three 8-bit colour channels, with or without an alpha channel.

Icon files are usually suitable, but photographs (JPEG) files are not.

The figure below shows the result of loading the "Gnonograms" icon.

Gnonograms icon loaded

Click on the "Monochrome" checkbox. The image is converted to black and white

Gnonograms icon converted to black and white

If required, click on the "Invert" checkbox. Black and white are interchanged.

Some images yield better puzzles when inverted:

Gnonograms icon converted to black and white

Use the zoom slider to adjust the scaling

Use the threshold sliders to adjust the monochrome conversion to give the best results

The conversion process is not perfect and most images require some manual adjustment after conversion to a nonogram:

Adjusted monochrome image

When satisfied click the "OK" button. The image is converted to a nonogram and imported into the main program.

If necessary, the puzzle can be adjusted to give a better appearance or to make it more easily soluble using the design functions in the main program.

Use the puzzle editor (See 09. puzzle editor) to enter the puzzle name, designer name, license and date of creation

It is recommended to run the computer solver (with or without the 'use advanced solver option') to check whether the puzzle is soluble before saving it. If you want to have the puzzle load already in solving mode, then make sure it is in this mode when you save it.

Converted and imported puzzle

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