Flip WebCam input Horizontally

[farshizzo]

Do you actually need the image data to be flipped, or do you just want to display the texture flipped? If you just want to display the texture flipped horizontally, then simply apply a negative scale on the texture quad:

quat.setScale([-1,1,1])

[goro]

Thanks farshizzo for the reply. I actually need the Image data to be flipped. I am working on Augmented Reality Project & I want to create a Mirror. If I flipped the quad containing the Image then the marker wont get flipped, so the co-ordination between image & logo gets lost and mismatch happens. To overcome this issue I need help. I have solved the colour issue in flipping video image by modifying the code as shown below & got the output as shown in below image:

import viz
import vizact
import Image
viz.go()

def PIL_TO_VIZARD(texture):
	image = Image.fromstring('RGB',[width,height],cam.getImageData())
	"""Copy the PIL image to the Vizard texture"""
	im = image.transpose(Image.FLIP_LEFT_RIGHT)
	RGB2BGR = (
		0.0, 0.0, 1.0, 0.0,
		0.0, 1.0, 0.0, 0.0,
		1.0, 0.0, 0.0, 0.0 )
	texture.setImageData(im.convert('RGB',RGB2BGR).tostring(),im.size)
	
#Create a blank Vizard texture
tex = viz.addBlankTexture([1,1])

cam = viz.addVideo('mona.mpg')
cam.play()
cam.loop()

width,height,type = cam.getSize()


#---------------------------- Texture Comparison -----------------------------#
quad1 = viz.addTexQuad()
quad1.setPosition([-.75, 2, 3])

quad1.texture(cam)

quad2 = viz.addTexQuad()
quad2.setPosition([.75, 2, 3])
quad2.texture(tex)

#-----------------------------------------------------------------------------#

vizact.ontimer(0,PIL_TO_VIZARD,tex)

[goro]

I working on ARToolKit & Successfully flipped the Webcam Image. But now the issue is Marker is not getting detected in flipped texture.

Here is the code:

import viz
import vizact
import Image
viz.go()

#------------------------ Flip Horizontal ------------------------------#
def FlipHorizontal(cam_tex,texture):
	image = Image.fromstring('RGB',[width,height],cam_tex.getImageData())
	"""Copy the PIL image to the Vizard texture"""
	im = image.transpose(Image.FLIP_LEFT_RIGHT)
	RGB2BGR = (
		0.0, 0.0, 1.0, 0.0,
		0.0, 1.0, 0.0, 0.0,
		1.0, 0.0, 0.0, 0.0 )
	texture.setImageData(im.convert('RGB',RGB2BGR).tostring(),im.size)
	
#Create a blank Vizard texture
tex = viz.addBlankTexture([1,1],format=viz.TEX_BGR)

#Load Video Camera
video = viz.add('VideoCamera.dle')
# Load Web Camera & set cam as Video Texture
cam = video.addWebcam()

#Load ARToolKit
ar = viz.add('ARToolKit.dle')

width,height,type = cam.getSize()

# Flip Video Texture Horizontally
vizact.ontimer(0,FlipHorizontal,cam,tex)

# Set ARToolKit Camera with cam as texture
camera = ar.addCamera(tex)  #---- This Dosn't work
#camera = ar.addCamera(cam) #---- This works
camera.setDebug(True)

# Add AR Marker
marker = camera.addMarker('ar/patt.hiro',width = 1000.00) #patt.hiro or patt.hiro_fh 

#Add logo model
logo = viz.add('logo.ive')

#Link logo model to marker sensor
link = viz.link(marker,logo)

[farshizzo]

You need to flip the image before ARToolkit processes the camera image. Try scheduling the FlipHorizontal function with a lower update priority using the following code, instead of using vizact.ontimer:

vizact.onupate(viz.PRIORITY_PLUGINS,FlipHorizontal,cam,tex)