Ocropus nlbin threshold extension

app/services/forms.py

@@ -3,6 +3,7 @@ from flask_wtf import FlaskForm
 from flask_wtf.file import FileField, FileRequired
 from wtforms import (
     BooleanField,
+    IntegerRangeField,
     MultipleFileField,
     SelectField,
     StringField,
@@ -49,6 +50,9 @@ class CreateTesseractOCRPipelineJobForm(CreateJobBaseForm):
     binarization = BooleanField('Binarization')
     pdf = FileField('File', validators=[FileRequired()])
     model = SelectField('Model', validators=[InputRequired()])
+    ocropus_nlbin_threshold = IntegerRangeField(
+        render_kw={'tooltips':'false', 'min': 0, 'max': 1, 'step': 0.1, 'start': [0.5]}
+    )
 
     def validate_binarization(self, field):
         service_info = SERVICES['tesseract-ocr-pipeline']['versions'][self.version.data]

app/services/routes.py

@@ -78,7 +78,8 @@ def tesseract_ocr_pipeline():
                 service=service_name,
                 service_args={
                     'binarization': form.binarization.data,
-                    'model': hashids.decode(form.model.data)
+                    'model': hashids.decode(form.model.data),
+                    'ocropus_nlbin_threshold': form.ocropus_nlbin_threshold.data
                 },
                 service_version=form.version.data,
                 user=current_user

app/templates/services/tesseract_ocr_pipeline.html.j2

@@ -83,6 +83,11 @@
                   </label>
                 </div>
               </div>
+              <div class="col s12"><p>&nbsp;</p></div>  
+              <div class="col s9">
+                <p>Intensity</p>
+                <p class="range-field">{{ form.ocropus_nlbin_threshold() }}</p>
+              </div>
               <div class="col s12"><p>&nbsp;</p></div>
               <div class="col s12 divider"></div>
               <div class="col s12"><p>&nbsp;</p></div>