✨ testing wand.Image.function('sinusoid')

Related to issue #4 - trying to find better modifiers for the function() call on images. Currently, the parameters for img.function('sinusoid') are being randomly generated, and it is a good idea to restrict the range of parameter generation so that results are more consistent and do not come out too dark or with a gray filter.

extra/glue_freq_phase.sh

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+#!/bin/bash
+
+IMGS="sine_tests/freq_phase"
+DIR="sine_tests/freq_phase/results"
+
+if [[ ! -d ${DIR} ]]; then
+    mkdir ${DIR}
+fi
+
+for i in {1..10}; do
+    montage ${IMGS}/${i}_-30.jpg ${IMGS}/${i}_-45.jpg -tile 2x1 -geometry +0+0 ${IMGS}/row_${i}.jpg
+    COUNT=-60
+    while [[ $COUNT -ge -90 ]]; do
+        montage ${IMGS}/row_${i}.jpg ${IMGS}/${i}_${COUNT}.jpg -tile 2x1 -geometry +0+0 ${IMGS}/row_${i}.jpg
+        COUNT=$((COUNT-15))
+    done
+done
+
+echo "created rows; sleeping for 3 seconds before continuing"
+sleep 3
+
+montage ${IMGS}/row_1.jpg ${IMGS}/row_2.jpg -tile 1x2 -geometry +0+0 ${DIR}/result_1-5.jpg
+for i in {3..5}; do
+    montage ${DIR}/result_1-5.jpg ${IMGS}/row_${i}.jpg -tile 1x2 -geometry +0+0 ${DIR}/result_1-5.jpg
+    sleep 2
+done
+echo "finished result file for rows 1-5"
+
+montage ${IMGS}/row_6.jpg ${IMGS}/row_7.jpg -tile 1x2 -geometry +0+0 ${DIR}/result_6-10.jpg
+for i in {8..10}; do
+    montage ${DIR}/result_6-10.jpg ${IMGS}/row_${i}.jpg -tile 1x2 -geometry +0+0 ${DIR}/result_6-10.jpg
+    sleep 2
+done
+
+echo "done!"

extra/sine_tests.py

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+import os
+from wand.image import Image
+from shutil import copyfile
+import glob
+import pdb
+
+def generate_images(filename):
+    outdir = './sine_tests'
+    if not os.path.isdir(outdir):
+        os.mkdir(outdir)
+    else:
+        for filename in glob.glob(outdir + '/*.*'):
+            os.remove(filename)
+    # four parameters for sinusoid transform: 
+    #    name           current range   result?
+    # 1. frequency      1 to 10         ?
+    # 2. phase shift    -90 to -25      ?
+    # 3. amplitude      0.1 to 0.9      best guess: gray filter
+    # 4. bias           0.1 to 0.9      lighten/darken
+    for frequency in range(1, 10):
+        for phase_shift in range(-90, -30, 15):
+            for amplitude in range(1, 9):
+                for bias in range(1, 9):
+                    params = [frequency, phase_shift, amplitude * 0.1, bias * 0.1]
+                    with Image(filename=filename) as img:
+                        img.modulate(200, 300)
+                        img.function('sinusoid', params)
+                        ampl = '%.1f' % params[2]
+                        biases = '%.1f' % params[3]
+                        img.save(filename= outdir + '/{}_{}_{}_{}.jpg'.format(params[0], params[1], ampl, biases))
+
+def test_frequency_phase(filename):
+    outdir = './sine_tests/freq_phase'
+    if not os.path.isdir(outdir):
+        os.mkdir(outdir)
+    for frequency in range(1, 11):
+        for phase_shift in range(-90, -15, 15):
+            params = [frequency, phase_shift, 0.9, 0.5]
+            with Image(filename=filename) as img:
+                img.modulate(200, 300)
+                img.function('sinusoid', params)
+                img.save(filename= outdir + '/{}_{}.jpg'.format(frequency, phase_shift))
+
+test_frequency_phase('./stock_images/bce223b38aeed99d.jpeg')
+
+# generate_images('./stock_images/bce223b38aeed99d.jpeg')