add brightness controls (#888)

Closes #860
2022-06-12 19:01:41 +02:00 · 2022-06-12 19:01:41 +02:00 · e2d758f540
commit e2d758f540
parent 861fbe9a2b
11 changed files with 350 additions and 4 deletions
--- a/labelImg.py
+++ b/labelImg.py
@ -34,6 +34,7 @@ from libs.shape import Shape, DEFAULT_LINE_COLOR, DEFAULT_FILL_COLOR
 from libs.stringBundle import StringBundle
 from libs.canvas import Canvas
 from libs.zoomWidget import ZoomWidget
+from libs.lightWidget import LightWidget
 from libs.labelDialog import LabelDialog
 from libs.colorDialog import ColorDialog
 from libs.labelFile import LabelFile, LabelFileError, LabelFileFormat
@ -180,10 +181,12 @@ class MainWindow(QMainWindow, WindowMixin):
        self.file_dock.setWidget(file_list_container)

        self.zoom_widget = ZoomWidget()
+        self.light_widget = LightWidget(get_str('lightWidgetTitle'))
        self.color_dialog = ColorDialog(parent=self)

        self.canvas = Canvas(parent=self)
        self.canvas.zoomRequest.connect(self.zoom_request)
+        self.canvas.lightRequest.connect(self.light_request)
        self.canvas.set_drawing_shape_to_square(settings.get(SETTING_DRAW_SQUARE, False))

        scroll = QScrollArea()
@ -326,6 +329,26 @@ class MainWindow(QMainWindow, WindowMixin):
            self.MANUAL_ZOOM: lambda: 1,
        }

+        light = QWidgetAction(self)
+        light.setDefaultWidget(self.light_widget)
+        self.light_widget.setWhatsThis(
+            u"Brighten or darken current image. Also accessible with"
+            " %s and %s from the canvas." % (format_shortcut("Ctrl+Shift+[-+]"),
+                                             format_shortcut("Ctrl+Shift+Wheel")))
+        self.light_widget.setEnabled(False)
+
+        light_brighten = action(get_str('lightbrighten'), partial(self.add_light, 10),
+                                'Ctrl+Shift++', 'light_lighten', get_str('lightbrightenDetail'), enabled=False)
+        light_darken = action(get_str('lightdarken'), partial(self.add_light, -10),
+                              'Ctrl+Shift+-', 'light_darken', get_str('lightdarkenDetail'), enabled=False)
+        light_org = action(get_str('lightreset'), partial(self.set_light, 50),
+                           'Ctrl+Shift+=', 'light_reset', get_str('lightresetDetail'), checkable=True, enabled=False)
+        light_org.setChecked(True)
+
+        # Group light controls into a list for easier toggling.
+        light_actions = (self.light_widget, light_brighten,
+                         light_darken, light_org)
+
        edit = action(get_str('editLabel'), self.edit_label,
                      'Ctrl+E', 'edit', get_str('editLabelDetail'),
                      enabled=False)
@ -364,6 +387,8 @@ class MainWindow(QMainWindow, WindowMixin):
                              zoom=zoom, zoomIn=zoom_in, zoomOut=zoom_out, zoomOrg=zoom_org,
                              fitWindow=fit_window, fitWidth=fit_width,
                              zoomActions=zoom_actions,
+                              lightBrighten=light_brighten, lightDarken=light_darken, lightOrg=light_org,
+                              lightActions=light_actions,
                              fileMenuActions=(
                                  open, open_dir, save, save_as, close, reset_all, quit),
                              beginner=(), advanced=(),
@ -411,7 +436,8 @@ class MainWindow(QMainWindow, WindowMixin):
            labels, advanced_mode, None,
            hide_all, show_all, None,
            zoom_in, zoom_out, zoom_org, None,
-            fit_window, fit_width))
+            fit_window, fit_width, None,
+            light_brighten, light_darken, light_org))

        self.menus.file.aboutToShow.connect(self.update_file_menu)

@ -424,7 +450,8 @@ class MainWindow(QMainWindow, WindowMixin):
        self.tools = self.toolbar('Tools')
        self.actions.beginner = (
            open, open_dir, change_save_dir, open_next_image, open_prev_image, verify, save, save_format, None, create, copy, delete, None,
-            zoom_in, zoom, zoom_out, fit_window, fit_width)
+            zoom_in, zoom, zoom_out, fit_window, fit_width, None,
+            light_brighten, light, light_darken, light_org)

        self.actions.advanced = (
            open, open_dir, change_save_dir, open_next_image, open_prev_image, save, save_format, None,
@ -500,6 +527,7 @@ class MainWindow(QMainWindow, WindowMixin):

        # Callbacks:
        self.zoom_widget.valueChanged.connect(self.paint_canvas)
+        self.light_widget.valueChanged.connect(self.paint_canvas)

        self.populate_mode_actions()

@ -601,6 +629,8 @@ class MainWindow(QMainWindow, WindowMixin):
        """Enable/Disable widgets which depend on an opened image."""
        for z in self.actions.zoomActions:
            z.setEnabled(value)
+        for z in self.actions.lightActions:
+            z.setEnabled(value)
        for action in self.actions.onLoadActive:
            action.setEnabled(value)

@ -1032,6 +1062,9 @@ class MainWindow(QMainWindow, WindowMixin):
        h_bar.setValue(new_h_bar_value)
        v_bar.setValue(new_v_bar_value)

+    def light_request(self, delta):
+        self.add_light(5*delta // (8 * 15))
+
    def set_fit_window(self, value=True):
        if value:
            self.actions.fitWidth.setChecked(False)
@ -1044,6 +1077,15 @@ class MainWindow(QMainWindow, WindowMixin):
        self.zoom_mode = self.FIT_WIDTH if value else self.MANUAL_ZOOM
        self.adjust_scale()

+    def set_light(self, value):
+        self.actions.lightOrg.setChecked(int(value) == 50)
+        # Arithmetic on scaling factor often results in float
+        # Convert to int to avoid type errors
+        self.light_widget.setValue(int(value))
+
+    def add_light(self, increment=10):
+        self.set_light(self.light_widget.value() + increment)
+
    def toggle_polygons(self, value):
        for item, shape in self.items_to_shapes.items():
            item.setCheckState(Qt.Checked if value else Qt.Unchecked)
@ -1172,6 +1214,7 @@ class MainWindow(QMainWindow, WindowMixin):
    def paint_canvas(self):
        assert not self.image.isNull(), "cannot paint null image"
        self.canvas.scale = 0.01 * self.zoom_widget.value()
+        self.canvas.overlay_color = self.light_widget.color()
        self.canvas.label_font_size = int(0.02 * max(self.image.width(), self.image.height()))
        self.canvas.adjustSize()
        self.canvas.update()
--- a/libs/canvas.py
+++ b/libs/canvas.py
@ -23,6 +23,7 @@ CURSOR_GRAB = Qt.OpenHandCursor

 class Canvas(QWidget):
    zoomRequest = pyqtSignal(int)
+    lightRequest = pyqtSignal(int)
    scrollRequest = pyqtSignal(int, int)
    newShape = pyqtSignal()
    selectionChanged = pyqtSignal(bool)
@ -47,6 +48,7 @@ class Canvas(QWidget):
        self.prev_point = QPointF()
        self.offsets = QPointF(), QPointF()
        self.scale = 1.0
+        self.overlay_color = None
        self.label_font_size = 8
        self.pixmap = QPixmap()
        self.visible = {}
@ -503,7 +505,15 @@ class Canvas(QWidget):
        p.scale(self.scale, self.scale)
        p.translate(self.offset_to_center())

-        p.drawPixmap(0, 0, self.pixmap)
+        temp = self.pixmap
+        if self.overlay_color:
+            temp = QPixmap(self.pixmap)
+            painter = QPainter(temp)
+            painter.setCompositionMode(painter.CompositionMode_Overlay)
+            painter.fillRect(temp.rect(), self.overlay_color)
+            painter.end()
+
+        p.drawPixmap(0, 0, temp)
        Shape.scale = self.scale
        Shape.label_font_size = self.label_font_size
        for shape in self.shapes:
@ -607,7 +617,9 @@ class Canvas(QWidget):
            v_delta = delta.y()

        mods = ev.modifiers()
-        if Qt.ControlModifier == int(mods) and v_delta:
+        if int(Qt.ControlModifier) | int(Qt.ShiftModifier) == int(mods) and v_delta:
+            self.lightRequest.emit(v_delta)
+        elif Qt.ControlModifier == int(mods) and v_delta:
            self.zoomRequest.emit(v_delta)
        else:
            v_delta and self.scrollRequest.emit(v_delta, Qt.Vertical)
--- a/libs/lightWidget.py
+++ b/libs/lightWidget.py
@ -0,0 +1,33 @@
+try:
+    from PyQt5.QtGui import *
+    from PyQt5.QtCore import *
+    from PyQt5.QtWidgets import *
+except ImportError:
+    from PyQt4.QtGui import *
+    from PyQt4.QtCore import *
+
+
+class LightWidget(QSpinBox):
+
+    def __init__(self, title, value=50):
+        super(LightWidget, self).__init__()
+        self.setButtonSymbols(QAbstractSpinBox.NoButtons)
+        self.setRange(0, 100)
+        self.setSuffix(' %')
+        self.setValue(value)
+        self.setToolTip(title)
+        self.setStatusTip(self.toolTip())
+        self.setAlignment(Qt.AlignCenter)
+
+    def minimumSizeHint(self):
+        height = super(LightWidget, self).minimumSizeHint().height()
+        fm = QFontMetrics(self.font())
+        width = fm.width(str(self.maximum()))
+        return QSize(width, height)
+
+    def color(self):
+        if self.value() == 50:
+            return None
+
+        strength = int(self.value()/100 * 255 + 0.5)
+        return QColor(strength, strength, strength)
--- a/resources.qrc
+++ b/resources.qrc
@ -27,6 +27,9 @@
 <file alias="zoom">resources/icons/zoom.png</file>
 <file alias="zoom-in">resources/icons/zoom-in.png</file>
 <file alias="zoom-out">resources/icons/zoom-out.png</file>
+<file alias="light_reset">resources/icons/light_reset.png</file>
+<file alias="light_lighten">resources/icons/light_lighten.png</file>
+<file alias="light_darken">resources/icons/light_darken.png</file>
 <file alias="delete">resources/icons/cancel.png</file>
 <file alias="next">resources/icons/next.png</file>
 <file alias="prev">resources/icons/prev.png</file>
--- a/resources/icons/light_brighten.svg
+++ b/resources/icons/light_brighten.svg
@ -0,0 +1,112 @@
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--- a/resources/icons/light_darken.png
+++ b/resources/icons/light_darken.png
--- a/resources/icons/light_darken.svg
+++ b/resources/icons/light_darken.svg
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--- a/resources/icons/light_lighten.png
+++ b/resources/icons/light_lighten.png
--- a/resources/icons/light_reset.png
+++ b/resources/icons/light_reset.png
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+       style="opacity:1;fill:none;stroke:#000000;stroke-width:3.71779;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       d="m 77.548811,161.30936 h 12.19352"
+       id="path1269-7-5" />
+    <path
+       style="opacity:1;fill:none;stroke:#000000;stroke-width:3.71779;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       d="m 127.56669,140.56949 -8.62211,8.62212"
+       id="path1269-6-5" />
+  </g>
+</svg>
--- a/resources/strings/strings.properties
+++ b/resources/strings/strings.properties
@ -52,6 +52,13 @@ fitWin=Fit Window
 fitWinDetail=Zoom follows window size
 fitWidth=Fit Width
 fitWidthDetail=Zoom follows window width
+lightbrighten=Brighten
+lightbrightenDetail=Increase Image Brightness
+lightdarken=Darken
+lightdarkenDetail=Decrease Image Brightness
+lightreset=Original Brightness
+lightresetDetail=Restore original brightness
+lightWidgetTitle=Image Brightness
 editLabel=Edit Label
 editLabelDetail=Modify the label of the selected Box
 shapeLineColor=Shape Line Color