diff --git a/src/gui/imgview.py b/src/gui/imgview.py
new file mode 100644
--- /dev/null
+++ b/src/gui/imgview.py
@@ -0,0 +1,91 @@
+import logging as log
+
+from PIL import ImageTk
+
+import config
+from .resizablecanvas import ResizableCanvas
+from corners import Corners
+from epoint import EPoint
+from grid import Grid
+import imageanalyzer
+
+
+class ImgView(ResizableCanvas):
+	def __init__(self,master=None,parent=None):
+		super().__init__(master)
+
+		self._parent=parent
+		self._corners=Corners()
+		self._boardGrid=None
+
+		self._img=None
+		self._tkImg=None
+		self._imgSizeCoef=1
+		self._imgShift=EPoint(0,0)
+
+		self.configure(width=480,height=360)
+		self.bind('<1>',lambda e: self.addCorner(e.x,e.y))
+
+	## Redraws the current image and its overlay.
+	def redraw(self):
+		self.delete("all")
+
+		if self._img:
+			img=self._img.copy()
+			img.thumbnail((int(self._width),int(self._height)))
+			self._tkImg=ImageTk.PhotoImage(img) # just to save the image from the garbage collector
+			self.create_image(self._width//2, self._height//2, anchor="center", image=self._tkImg)
+
+		for corner in self._corners.corners:
+			self.markPoint(corner.x,corner.y)
+
+		if self._boardGrid!=None and config.gui.showGrid:
+			for r in range(19):
+				a=self._boardGrid.intersections[r][0]
+				b=self._boardGrid.intersections[r][-1]
+				self.create_line(a.x,a.y,b.x,b.y,fill='#00ff00')
+			for c in range(19):
+				a=self._boardGrid.intersections[0][c]
+				b=self._boardGrid.intersections[-1][c]
+				self.create_line(a.x,a.y,b.x,b.y,fill='#00ff00')
+
+		if self._boardGrid!=None and config.gui.showBigPoints:
+			for r in range(19):
+				for c in range(19):
+					((r1,c1),(r2,c2))=imageanalyzer.relevantRect(self._boardGrid.intersections[r][c], *(self._boardGrid.stoneSizeAt(r, c)))
+					self.create_rectangle(r1,c1,r2,c2,outline="#00ffff")
+
+	def setImg(self,img):
+		w=int(self._width)
+		h=int(self._height)
+		wo,ho=img.size # o for original
+		widthRatio=wo/w
+		heightRatio=ho/h
+		self._imgSizeCoef=max(widthRatio,heightRatio)
+		# shift compensates possible horizontal or vertical empty margins from unmatching aspect ratios
+		self._imgShift=EPoint(wo-w*self._imgSizeCoef,ho-h*self._imgSizeCoef)/2
+
+		self._img=img
+
+	## Stores a grid corner located at x,y coordinates.
+	def addCorner(self,x,y):
+		self._corners.add(x,y)
+		log.debug("click on %d,%d",x,y)
+		log.debug("sizeCoef: %f, shift: %d,%d",self._imgSizeCoef,self._imgShift.x,self._imgShift.y)
+		if self._corners.canonizeOrder():
+			# transform corners from show coordinates to real coordinates
+			log.debug(self._corners.corners)
+			self._boardGrid=Grid(self._corners.corners)
+			corners=[(c*self._imgSizeCoef+self._imgShift) for c in self._corners.corners]
+			self._parent.sendMsg("setCorners",(corners,))
+
+		self.redraw()
+
+	## Marks a point at the image with a green cross. Used for corners.
+	def markPoint(self,x,y):
+		self.create_line(x-3,y-3,x+4,y+4,fill="#00ff00")
+		self.create_line(x-3,y+3,x+4,y-4,fill="#00ff00")
+
+	def _onResize(self,event):
+		super()._onResize(event)
+		self.redraw()