Problem with Global Feature Extractor using Histogram and Global Features

Chriis_Bg25

Hello  ,

I tried several times to use the "Global Feature Extractor using Histogram & global features" operator as a subprocess of a MCIO (Multiple Color Image Opener) operator but I had every time an error (java.lang.ArrayIndexOutOfBoundsException).
Is it someone would already have used this operator and/or would have an example ?
Thanks,

Chris

StaryVena

Hello Chris,
I think the "Global Feature Extractor using Histogram & global features" operator is not intended to be used inside "Multiple Color Image Opener" operator.  You can just use "Global Feature Extractor using Histogram & global features" operator. Select folder and add name to each class and that's it. Or you can use "Multiple Color Image Opener" operator with Global Feature Extractor from single image.  Here is example process:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.3.008">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.3.008" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="imageprocessing:multiple_color_image_opener" compatibility="1.3.003" expanded="true" height="60" name="MCIO" width="90" x="179" y="30">
        <list key="images">
          <parameter key="animals" value="E:\google\animals"/>
          <parameter key="art" value="E:\google\art"/>
        </list>
        <parameter key="assign_label" value="true"/>
        <process expanded="true">
          <operator activated="true" class="imageprocessing:global_feature_extraction" compatibility="1.3.003" expanded="true" height="60" name="Global Feature Extractor from a Single Image" width="90" x="514" y="30">
            <process expanded="true">
              <operator activated="true" class="imageprocessing:histogram" compatibility="1.3.003" expanded="true" height="60" name="histogram" width="90" x="246" y="30"/>
              <operator activated="true" class="imageprocessing:statistics" compatibility="1.3.003" expanded="true" height="60" name="Global statistics" width="90" x="246" y="120"/>
              <connect from_port="color image plus 1" to_op="histogram" to_port="color image plus"/>
              <connect from_port="color image plus 2" to_op="Global statistics" to_port="color image plus"/>
              <connect from_op="histogram" from_port="features" to_port="feature 1"/>
              <connect from_op="Global statistics" from_port="features" to_port="feature 2"/>
              <portSpacing port="source_color image plus 1" spacing="0"/>
              <portSpacing port="source_color image plus 2" spacing="0"/>
              <portSpacing port="source_color image plus 3" spacing="0"/>
              <portSpacing port="sink_feature 1" spacing="0"/>
              <portSpacing port="sink_feature 2" spacing="0"/>
              <portSpacing port="sink_feature 3" spacing="0"/>
            </process>
          </operator>
          <connect from_port="color image plus" to_op="Global Feature Extractor from a Single Image" to_port="color image plus"/>
          <connect from_op="Global Feature Extractor from a Single Image" from_port="example set" to_port="Example set"/>
          <portSpacing port="source_color image plus" spacing="0"/>
          <portSpacing port="sink_Example set" spacing="0"/>
        </process>
      </operator>
      <connect from_op="MCIO" from_port="example set" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>

Best,
Václav