Utils file

utils.py

@@ -0,0 +1,75 @@
+import numpy
+import sahi.predict
+import sahi.utils
+import PyPDF4
+from pdf2image import convert_from_path
+from PIL import Image
+
+TEMP_DIR = "temp"
+
+
+def sahi_yolov8m_inference(
+    image,
+    detection_model,
+    slice_height=512,
+    slice_width=512,
+    overlap_height_ratio=0.2,
+    overlap_width_ratio=0.2,
+    image_size=640,
+    #postprocess_type="GREEDYNMM",
+    #postprocess_match_metric="IOS",
+    postprocess_match_threshold=0.5,
+    #postprocess_class_agnostic=False,
+):
+
+    # standard inference
+    detection_model.image_size = image_size
+    prediction_result_1 = sahi.predict.get_prediction(
+        image=image, detection_model=detection_model
+    )
+    visual_result_1 = sahi.utils.cv.visualize_object_predictions(
+        image=numpy.array(image),
+        object_prediction_list=prediction_result_1.object_prediction_list,
+    )
+    output_1 = Image.fromarray(visual_result_1["image"])
+
+    # sliced inference
+    prediction_result_2 = sahi.predict.get_sliced_prediction(
+        image=image,
+        detection_model=detection_model,
+        slice_height=slice_height,
+        slice_width=slice_width,
+        overlap_height_ratio=overlap_height_ratio,
+        overlap_width_ratio=overlap_width_ratio,
+        #postprocess_type=postprocess_type,
+        #postprocess_match_metric=postprocess_match_metric,
+        postprocess_match_threshold=postprocess_match_threshold,
+        #postprocess_class_agnostic=postprocess_class_agnostic,
+    )
+    visual_result_2 = sahi.utils.cv.visualize_object_predictions(
+        image=numpy.array(image),
+        object_prediction_list=prediction_result_2.object_prediction_list,
+    )
+
+    output_2 = Image.fromarray(visual_result_2["image"])
+
+    return output_1, output_2
+
+def convert_pdf_file(
+    path,
+    #filename=name,
+    dpi=300,
+    image_width=4961,
+    image_heigth=3508,
+    grayscale=True,
+):
+    with open(path, 'rb') as pdf_file:
+        pdf_reader = PyPDF4.PdfFileReader(pdf_file, strict=False)
+        first_page = pdf_reader.getPage(0)
+        page_size = (first_page.mediaBox.getWidth(), first_page.mediaBox.getHeight())
+    if page_size[0] > page_size[1]:
+        image = convert_from_path(path, dpi=dpi, size=(image_width,image_heigth), grayscale=grayscale)
+    else:
+        image = convert_from_path(path, dpi=dpi, size=(image_heigth,image_width), grayscale=grayscale)
+    return image
+    #image[0].save(f'{path}/{filename}.png', 'PNG')