def erosion(canvas):
'''
#TODO: Write what function does.
'''
covertGray(canvas)
canvas.data.colourPopToHappen = False
canvas.data.cropPopToHappen = False
canvas.data.drawOn = False
if canvas.data.image != None:
print(type(canvas.data.image))
# Taking a matrix of size 5 as the kernel
image_data = np.asarray(canvas.data.image)
kernel = np.ones((5,5), np.uint8)
# The first parameter is the original image,
# kernel is the matrix with which image is
# convolved and third parameter is the number
# of iterations, which will determine how much
# you want to erode/dilate a given image.
dilated_image = cv2.erode(image_data, kernel, iterations=1)
print(type(dilated_image))
canvas.data.image = Image.fromarray(dilated_image)
print(type(canvas.data.image))
file_op.save(canvas)
canvas.data.undoQueue.append(canvas.data.image.copy())
canvas.data.imageForTk=draw.makeImageForTk(canvas)
draw.drawImage(canvas)
def flip(canvas):
canvas.data.colourPopToHappen = False
canvas.data.cropPopToHappen = False
canvas.data.drawOn = False
if canvas.data.image != None:
canvas.data.image = ImageOps.flip(canvas.data.image)
file_op.save(canvas)
canvas.data.undoQueue.append(canvas.data.image.copy())
canvas.data.imageForTk = draw.makeImageForTk(canvas)
draw.drawImage(canvas)
def reset(canvas):
canvas.data.colourPopToHappen = False
canvas.data.cropPopToHappen = False
canvas.data.drawOn = False
### change back to original image
if canvas.data.image != None:
canvas.data.image = canvas.data.originalImage.copy()
file_op.save(canvas)
canvas.data.undoQueue.append(canvas.data.image.copy())
canvas.data.imageForTk = draw.makeImageForTk(canvas)
draw.drawImage(canvas)
def redo(canvas):
if len(canvas.data.redoQueue) > 0:
canvas.data.image = canvas.data.redoQueue[0]
save(canvas)
if len(canvas.data.redoQueue) > 0:
# we remove this version from the Redo Deque beacuase it
# has become our current image
lastImage = canvas.data.redoQueue.popleft()
canvas.data.undoQueue.append(lastImage)
canvas.data.imageForTk = draw.makeImageForTk(canvas)
draw.drawImage(canvas)
def performCrop(event, canvas):
canvas.data.image=\
canvas.data.image.crop(\
(int(round((canvas.data.startCropX-canvas.data.imageTopX)*canvas.data.imageScale)),
int(round((canvas.data.startCropY-canvas.data.imageTopY)*canvas.data.imageScale)),
int(round((canvas.data.endCropX-canvas.data.imageTopX)*canvas.data.imageScale)),
int(round((canvas.data.endCropY-canvas.data.imageTopY)*canvas.data.imageScale))))
canvas.data.endCrop = False
canvas.data.cropPopToHappen = False
file_op.save(canvas)
canvas.data.undoQueue.append(canvas.data.image.copy())
canvas.data.imageForTk = draw.makeImageForTk(canvas)
draw.drawImage(canvas)
def undo(canvas):
if len(canvas.data.undoQueue) > 0:
# the last element of the Undo Deque is the
# current version of the image
lastImage = canvas.data.undoQueue.pop()
# we would want the current version if wehit redo after undo
canvas.data.redoQueue.appendleft(lastImage)
if len(canvas.data.undoQueue) > 0:
# the previous version of the image
canvas.data.image = canvas.data.undoQueue[-1]
file_op.save(canvas)
canvas.data.imageForTk = draw.makeImageForTk(canvas)
draw.drawImage(canvas)
def rotateFinished(canvas, rotateWindow, rotateSlider, previousAngle):
if canvas.data.rotateWindowClose == True:
rotateWindow.destroy()
canvas.data.rotateWindowClose = False
else:
if canvas.data.image != None and rotateWindow.winfo_exists():
canvas.data.angleSelected = rotateSlider.get()
if canvas.data.angleSelected!= None and \
canvas.data.angleSelected!= previousAngle:
canvas.data.image=\
canvas.data.image.rotate(float(canvas.data.angleSelected))
canvas.data.imageForTk = draw.makeImageForTk(canvas)
draw.drawImage(canvas)
canvas.after(200, lambda:rotateFinished(canvas,\
rotateWindow, rotateSlider, canvas.data.angleSelected) )
def covertGray(canvas):
canvas.data.colourPopToHappen=False
canvas.data.cropPopToHappen=False
canvas.data.drawOn=False
#### The existing method to convert to a grayscale image converts the ####
#### image mode, so I used my own function to convert ####
# value of each channel of a pixel is set to the average of the original
# values of the channels
if canvas.data.image!=None:
data=[]
for col in range(canvas.data.image.size[1]):
for row in range(canvas.data.image.size[0]):
r, g, b= canvas.data.image.getpixel((row, col))
avg= int(round((r + g + b)/3.0))
R, G, B= avg, avg, avg
data.append((R, G, B))
canvas.data.image.putdata(data)
file_op.save(canvas)
canvas.data.undoQueue.append(canvas.data.image.copy())
canvas.data.imageForTk=draw.makeImageForTk(canvas)
draw.drawImage(canvas)
def newImage(canvas):
imageName = askopenfilename()
filetype = ""
#make sure it's an image file
try:
filetype = imghdr.what(imageName)
except:
messagebox.showinfo(title="Image File",\
message="Choose an Image File!" , parent=canvas.data.mainWindow)
# restrict filetypes to .jpg, .bmp, etc.
if filetype in ['jpeg', 'bmp', 'png', 'tiff']:
canvas.data.imageLocation = imageName
im = Image.open(imageName)
canvas.data.image = im
canvas.data.originalImage = im.copy()
canvas.data.undoQueue.append(im.copy())
canvas.data.imageSize = im.size #Original Image dimensions
canvas.data.imageForTk = draw.makeImageForTk(canvas)
draw.drawImage(canvas)
else:
messagebox.showinfo(title="Image File",\
message="Choose an Image File!" , parent=canvas.data.mainWindow)
def transpose(canvas):
canvas.data.colourPopToHappen = False
canvas.data.cropPopToHappen = False
canvas.data.drawOn = False
# I treated the image as a continuous list of pixel values row-wise
# and simply excnaged the rows and the coloums
# in oder to make it rotate clockewise, I reversed all the rows
if canvas.data.image != None:
imageData = list(canvas.data.image.getdata())
newData = []
newimg=Image.new(canvas.data.image.mode,\
(canvas.data.image.size[1], canvas.data.image.size[0]))
for i in range(canvas.data.image.size[0]):
addrow = []
for j in range(i, len(imageData), canvas.data.image.size[0]):
addrow.append(imageData[j])
addrow.reverse()
newData += addrow
newimg.putdata(newData)
canvas.data.image = newimg.copy()
file_op.save(canvas)
canvas.data.undoQueue.append(canvas.data.image.copy())
canvas.data.imageForTk = draw.makeImageForTk(canvas)
draw.drawImage(canvas)
