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Supplementary Materials for STEFANN: Scene Text Editor using Font Adaptive Neural Network Prasun Roy 1* , Saumik Bhattacharya 2* , Subhankar Ghosh 1* , and Umapada Pal 1 1 Indian Statistical Institute, Kolkata, India 2 Indian Institute of Technology, Kharagpur, India https://prasunroy.github.io/stefann Figure 1. Editing texts in road signboards with STEFANN. Left: Original images. Right: Edited images. Text regions are intentionally left unmarked to show the visual coherence of edited texts with original texts without creating passive attention. * These authors contributed equally to this work.

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Supplementary Materialsfor

STEFANN: Scene Text Editor using Font Adaptive Neural Network

Prasun Roy1∗, Saumik Bhattacharya2∗, Subhankar Ghosh1∗, and Umapada Pal11Indian Statistical Institute, Kolkata, India

2Indian Institute of Technology, Kharagpur, Indiahttps://prasunroy.github.io/stefann

Figure 1. Editing texts in road signboards with STEFANN. Left: Original images. Right: Edited images. Text regions are intentionallyleft unmarked to show the visual coherence of edited texts with original texts without creating passive attention.

∗These authors contributed equally to this work.

https://prasunroy.github.io/stefann

Page 2: Supplementary Materials for STEFANN: Scene Text Editor ... · Supplementary Materials for STEFANN: Scene Text Editor using Font Adaptive Neural Network Prasun Roy 1, Saumik Bhattacharya2,

Figure 2. Editing texts in movie posters with STEFANN. Left: Original images. Right: Edited images. Text regions are intentionally leftunmarked to show the visual coherence of edited texts with original texts without creating passive attention.

Page 3: Supplementary Materials for STEFANN: Scene Text Editor ... · Supplementary Materials for STEFANN: Scene Text Editor using Font Adaptive Neural Network Prasun Roy 1, Saumik Bhattacharya2,

Figure 3. Editing texts in scene images with STEFANN. Left: Original images with text regions marked in red. Right: Edited images withtext regions marked in green.

Page 4: Supplementary Materials for STEFANN: Scene Text Editor ... · Supplementary Materials for STEFANN: Scene Text Editor using Font Adaptive Neural Network Prasun Roy 1, Saumik Bhattacharya2,

Figure 4. Editing texts in scene images with STEFANN. Left: Original images with text regions marked in red. Right: Edited images withtext regions marked in green.

Page 5: Supplementary Materials for STEFANN: Scene Text Editor ... · Supplementary Materials for STEFANN: Scene Text Editor using Font Adaptive Neural Network Prasun Roy 1, Saumik Bhattacharya2,

Figure 5. Generation of all possible image pairs for a specific font with FANnet. In the first row, characters highlighted in green are theground truth images. For each subsequent row, character highlighted in red is the image input (source) and characters highlighted in blueare the image outputs (targets) from FANnet, generated by varying the encoding input for each target character. This figure shows thestructural consistency of FANnet on a specific font regardless of the source character.

Page 6: Supplementary Materials for STEFANN: Scene Text Editor ... · Supplementary Materials for STEFANN: Scene Text Editor using Font Adaptive Neural Network Prasun Roy 1, Saumik Bhattacharya2,

Ground Truth

Colornet

Ground Truth

Colornet

Ground Truth

Colornet

Ground Truth

Colornet

Figure 6. Color transfer with Colornet. In the first row, characters highlighted in red are the binary target character images that need tobe colorized. Each subsequent image block shows the colored source character image (highlighted in red), ground truth images for thecolored target characters (top) and the color transferred images generated from Colornet (bottom). This figure shows the color consistencyof Colornet for both solid and gradient colors.

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