本文整理汇总了Python中qgis.PyQt.QtGui.QImage.setPixel方法的典型用法代码示例。如果您正苦于以下问题：Python QImage.setPixel方法的具体用法？Python QImage.setPixel怎么用？Python QImage.setPixel使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.PyQt.QtGui.QImage的用法示例。
在下文中一共展示了QImage.setPixel方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: updateMask
# 需要导入模块: from qgis.PyQt.QtGui import QImage [as 别名]
# 或者: from qgis.PyQt.QtGui.QImage import setPixel [as 别名]
def updateMask(control_image_path, rendered_image_path, mask_image_path):
control_image = imageFromPath(control_image_path)
if not control_image:
error('Could not read control image {}'.format(control_image_path))
rendered_image = imageFromPath(rendered_image_path)
if not rendered_image:
error('Could not read rendered image {}'.format(rendered_image_path))
if not rendered_image.width() == control_image.width() or not rendered_image.height() == control_image.height():
print ('Size mismatch - control image is {}x{}, rendered image is {}x{}'.format(control_image.width(),
control_image.height(),
rendered_image.width(),
rendered_image.height()))
max_width = min(rendered_image.width(), control_image.width())
max_height = min(rendered_image.height(), control_image.height())
#read current mask, if it exist
mask_image = imageFromPath(mask_image_path)
if mask_image.isNull():
print 'Mask image does not exist, creating {}'.format(mask_image_path)
mask_image = QImage(control_image.width(), control_image.height(), QImage.Format_ARGB32)
mask_image.fill(QColor(0, 0, 0))
#loop through pixels in rendered image and compare
mismatch_count = 0
linebytes = max_width * 4
for y in xrange(max_height):
control_scanline = control_image.constScanLine(y).asstring(linebytes)
rendered_scanline = rendered_image.constScanLine(y).asstring(linebytes)
mask_scanline = mask_image.scanLine(y).asstring(linebytes)
for x in xrange(max_width):
currentTolerance = qRed(struct.unpack('I', mask_scanline[x * 4:x * 4 + 4])[0])
if currentTolerance == 255:
#ignore pixel
continue
expected_rgb = struct.unpack('I', control_scanline[x * 4:x * 4 + 4])[0]
rendered_rgb = struct.unpack('I', rendered_scanline[x * 4:x * 4 + 4])[0]
difference = colorDiff(expected_rgb, rendered_rgb)
if difference > currentTolerance:
#update mask image
mask_image.setPixel(x, y, qRgb(difference, difference, difference))
mismatch_count += 1
if mismatch_count:
#update mask
mask_image.save(mask_image_path, "png")
print 'Updated {} pixels in {}'.format(mismatch_count, mask_image_path)
else:
print 'No mismatches in {}'.format(mask_image_path)