Personal tools
You are here: Home gvSIG Projects gvSIG Desktop Documentation User documentation gvSIG-Desktop 1.9. User manual Manual de usuario gvSIG 1.9
gvSIG Desktop
gvSIG Desktop

Cached time 11/22/13 04:24:37 Clear cache and reload

 
Document Actions

Manual de usuario gvSIG 1.9

by Grupo gvSIG last modified 2011-04-19 16:42

Transparent area

With this functionality it is possible to set the transparency level of a Region of Interest (ROI). The region of interest must have been defined previously. If the layer does not have a region of interest, the following message will appear: "A Region of Interest (ROI) must be defined for this layer to apply this filter. Please go to the dialog Area of Interest and select at least one ROI." If there are already one or more ROI associated with the layer, the message will not appear. Instead, a list of ROI will be shown, from which you can select one or more by ticking the corresponding check box. Then, adjust the level of transparency with the slide bar or by entering the value directly in the text box next to the slider. Ticking the check box labeled as "Inverse" will result in the opposite effect; all of the image except for the ROI will be set to the specified transparency level.

filtrado.img/es/RegionesTransparentes.png

Transparent area filter

Mask

With this functionality it is possible to cut out a Region of Interest (ROI) that has been previously defined for the layer by assigning a fixed user-specified value to the rest of the image outside the ROI. If the layer does not have a region of interest, the following message will appear: "A Region of Interest (ROI) must be defined for this layer to apply this filter. Please go to the dialog Area of Interest and select at least one ROI." If there are already one or more ROI associated with the layer, the message will not appear. Instead, a list of ROI will be shown, from which you can select one or more by ticking the corresponding check box. Then, select the value to be assigned to the pixels outside the ROI by typing a number in the "value" text box. The default value is -99,999. Ticking the check box labeled as "Inverse" will result in the opposite effect; the ROI will be assigned the specified value while the rest of the image values are maintained.

filtrado.img/es/Mascara.png

Mask filter

Get freemind document

View source document Get permanent link


Powered by Plone CMS, the Open Source Content Management System

This site conforms to the following standards: