The imageview is based on python2 and pyqt4, which is used for labeled the training data for character_segmentation.
1.When you move your mouse on the image, an auxiliary line wiil appear, you can just split the characters in the image by pressing your mouse and the coordinates of segmentation lines will be record as xml file in a result directory. You should write the characters in the below textbox before you save the image.
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When you have labeled an image, you can simplily press the Next button to load the next image under your current image folder and the previous image will be saved as well.
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The + - button is used for zoom in and zoom out respectively. Other functions are in the menu list.