我试图编写使用numpy和scipy生成视差贴图的代码,但是我存储在我的numpy数组中的值与我的图像完全不同,这些值实际上显示在我的输出图像,保存与misc.imsave。例如,在数组中,没有一个值大于22,但在图像中,我有从0到255的全部值。我认为,也许imsave正在扩展值,以便最大值显示为255,但我有用imsave创建的其他图像的最大值低于255.scipy imsave保存错误的值
这些是我用来创建我的视差地图的函数,给出两个pgm图像已沿x轴移动:
def disp(i, j, winSize, leftIm, rightIm): #calculate disparity for a given point
width = leftIm.shape[1]
height = leftIm.shape[0]
w = winSize/2
minSAD = 9223372036854775807 #max int
for d in range(23):
SAD = 0.0 #SAD
k = i - w
v = i + w
m = j - w
n = j + w
for p in range(k, v+1): #window - x
for q in range(m, n+1): #window y
if(p - d > 0 and p < width and q < height):
SAD += abs((int(leftIm[q][p]) - int(rightIm[q][p - d])))
if(SAD < minSAD):
minSAD = SAD
disp = d
# print "%d, %d" % (i, j)
return (disp, SAD)
def dispMap(winSize, leftIm, rightIm):
width = leftIm.shape[1]
height = leftIm.shape[0]
outIm = np.zeros((height, width))
SADstore = np.zeros((height, width))
w = winSize/2
for i in range(w, width-w):
for j in range(w, height/3-w):
dispout = disp(i, j, winSize, leftIm, rightIm)
outIm[j][i] = 1 * dispout[0] #should normally multiply by 4
SADstore[j][i] = dispout[1]
return (outIm, SADstore)
忽略SAD/SADstore返回值,我确保这些不影响我当前的过程。
这是我用得到我的输出代码:
disp12 = dispMap(9, view1, view2)
disp12im = disp12[0]
misc.imsave('disp121.pgm', disp12im)
由于它的电流,没有什么disp12im应> 23.如果我运行一个循环来检查这个阵列上,这仍然是真实的。但是,如果我加载保存的图像并在值上循环运行,我会得到超过23的数字。我做错了什么?