Labelimg: The effect of Difficult button

[315386775]

This pull contains :

• Difficult checkbox to label difficult or with occlusion object (saved in shape)

    <object>
        <name>cat</name>
        <pose>Unspecified</pose>
        <truncated>0</truncated>
        **<difficult>1</difficult>**
        <bndbox>
            <xmin>141</xmin>
            <ymin>459</ymin>
            <xmax>343</xmax>
            <ymax>719</ymax>
        </bndbox>
    </object>

i don't know the meaning and the effect. Can anyone help me?

[tzutalin]

From my point of views, 'difficult tag' is designed for object detection to exclude the samples labeled as difficult

[srafay]

so if you select difficult attribute for an object, it will not be considered in training of the model?
@tzutalin

[vdalv]

@srafay No, I don't believe that's correct.
@315386775 Here's an explanation of the difficult attribute:

"The difficult field being set to 1 indicates that the object has been annotated as "difficult", for example an object which is clearly visible but difficult to recognize without substantial use of context." - Source

[srafay]

@vdalv alright thanks!