diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4ace872..cac14f5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,19 +3,26 @@ image: docker:stable
 services:
   - docker:stable-dind
 
-variables:
-  DOCKER_DRIVER: overlay2
-
 stages:
   - build
   - push
-  - clean
 
-before_script:
-  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+variables:
+  DOCKER_DRIVER: overlay2
+
+.reg_setup:
+  before_script:
+    - apk add --no-cache curl
+    - curl --fail --show-error --location "https://github.com/genuinetools/reg/releases/download/v$REG_VERSION/reg-linux-amd64" --output /usr/local/bin/reg
+    - echo "$REG_SHA256  /usr/local/bin/reg" | sha256sum -c -
+    - chmod a+x /usr/local/bin/reg
+  variables:
+    REG_SHA256: ade837fc5224acd8c34732bf54a94f579b47851cc6a7fd5899a98386b782e228
+    REG_VERSION: 0.16.1
 
 build_image:
   script:
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
     - docker build -t $INTERMEDIATE_IMAGE_TAG .
     - docker push $INTERMEDIATE_IMAGE_TAG
   stage: build
@@ -25,10 +32,14 @@ build_image:
     INTERMEDIATE_IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
 
 push_master:
+  extends:
+    - .reg_setup
   only:
     - master
   script:
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
     - docker pull $INTERMEDIATE_IMAGE_TAG
+    - /usr/local/bin/reg rm -d --auth-url $CI_REGISTRY -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $INTERMEDIATE_IMAGE_TAG
     - docker tag $INTERMEDIATE_IMAGE_TAG $IMAGE_TAG
     - docker push $IMAGE_TAG
   stage: push
@@ -39,13 +50,17 @@ push_master:
     INTERMEDIATE_IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
 
 push_other:
+  extends:
+    - .reg_setup
   except:
     - master
   only:
     - branches
     - tags
   script:
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
     - docker pull $INTERMEDIATE_IMAGE_TAG
+    - /usr/local/bin/reg rm -d --auth-url $CI_REGISTRY -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $INTERMEDIATE_IMAGE_TAG
     - docker tag $INTERMEDIATE_IMAGE_TAG $IMAGE_TAG
     - docker push $IMAGE_TAG
   stage: push
@@ -54,19 +69,3 @@ push_other:
   variables:
     IMAGE_TAG: $CI_REGISTRY_IMAGE:CI_COMMIT_REF_NAME
     INTERMEDIATE_IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
-
-delete_image:
-  before_script:
-    - apk add --no-cache curl
-    - curl --fail --show-error --location "https://github.com/genuinetools/reg/releases/download/v$REG_VERSION/reg-linux-amd64" --output /usr/local/bin/reg
-    - echo "$REG_SHA256  /usr/local/bin/reg" | sha256sum -c -
-    - chmod a+x /usr/local/bin/reg
-  script:
-    - /usr/local/bin/reg rm -d --auth-url $CI_REGISTRY -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $INTERMEDIATE_IMAGE_TAG
-  stage: clean
-  tags:
-    - docker
-  variables:
-    INTERMEDIATE_IMAGE_TAG: $CI_PROJECT_PATH:$CI_COMMIT_SHA
-    REG_SHA256: ade837fc5224acd8c34732bf54a94f579b47851cc6a7fd5899a98386b782e228
-    REG_VERSION: 0.16.1
diff --git a/ocr b/ocr
index ab50ebf..0ae9f52 100755
--- a/ocr
+++ b/ocr
@@ -1,16 +1,14 @@
 #!/usr/bin/env python2.7
 # coding=utf-8
 
-
 """
 ocr
 
-Usage:  For usage instructions run with option --help
+Usage: For usage instructions run with option --help
 Authors: Patrick Jentsch <p.jentsch@uni-bielefeld.de
          Stephan Porada <sporada@uni-bielefeld.de>
 """
 
-
 from argparse import ArgumentParser
 from natsort import natsorted
 from pyflow import WorkflowRunner
@@ -20,8 +18,7 @@ import sys
 import tempfile
 
 
-TESSERACT_MODELS = ['deu', 'eng', 'enm', 'fra', 'frk', 'frm', 'ita', 'por',
-                    'spa']
+TESSERACT_MODELS = ['deu', 'eng', 'enm', 'fra', 'frk', 'frm', 'ita', 'por', 'spa']  # noqa
 
 
 def parse_args():
@@ -448,7 +445,8 @@ def collect_jobs(input_dir, output_dir, intermediate_dir):
     for file in os.listdir(input_dir):
         if os.path.isdir(os.path.join(input_dir, file)):
             jobs += collect_jobs(os.path.join(input_dir, file),
-                                 os.path.join(output_dir, file))
+                                 os.path.join(output_dir, file),
+                                 os.path.join(intermediate_dir, file))
         elif file.lower().endswith('.pdf'):
             job = OCRPipelineJob(os.path.join(input_dir, file),
                                  os.path.join(output_dir, file),