使用setPixel更改像素颜色

Question

I have ab/w picture I need to edit pixel by pixel. If a pixel too dark it's color should be changed to black. Here's my code:

    for i in range(width):
        for j in range(height):
            pixel_value = int(hex(self.img.pixel(i, j))[8:], 16)

            if pixel_value < 110:
                self.img.setPixel(i, j, .......)

So the problem is I don't know how to pass a color to setPixel(). AFAIK it should be something like

self.img.setPixel(i, j, qRgb(0, 0, 0))

I'm using PyQt5.12.3 and I don't know how to import qRgb. PyQt5.QtGui only has qRgba64. If qRgba64 is also ok for setPixel() then how do I pass black color with qRgba64?

Answer 1

I find the problem that you point out strange because if there exists the class qRgb in PyQt5 5.12.3 (I have also tested it in PyQt5 5.13.0):

image.setPixel(i, j, QtGui.qRgb(0, 0, 0))

But anyway, if you want to use setPixelColor() and convert the QRgba64 to QColor:

image.setPixelColor(i, j, QtGui.QColor(QtGui.QRgba64.fromRgba(0, 0, 0, 255)))

Or better to use QColor:

image.setPixelColor(i, j, QtGui.QColor(0, 0, 0))