主题:在matlab里面如何把灰度值或RGB值还原成图像
xiaoyisos
[专家分:0] 发布于 2008-03-23 04:08:00
在matlab里面如何把灰度值或RGB值还原成图像,我现在用记事本打开一个ps文档里面有一个tif黑白图片的编码 估计是灰度值表示的。我现在想把编码还原成图片。请问matlab可以做到吗?很急!!不知道VB有没有这样的能力、
沙发
blivfate [专家分:720] 发布于 2008-03-23 22:48:00
image函数,说明文件如下:
IMAGE Display image.
IMAGE(C) displays matrix C as an image. Each element of C
specifies the color of a rectilinear patch in the image. C can be
a matrix of dimension MxN or MxNx3, and can contain double, uint8,
or uint16 data.
When C is a 2-dimensional MxN matrix, the elements of C are used
as indices into the current COLORMAP to determine the color. The
value of the image object's CDataMapping property determines the
method used to select a colormap entry. For 'direct' CDataMapping
(the default), values in C are treated as colormap indices
(1-based if double, 0-based if uint8 or uint16). For 'scaled'
CDataMapping, values in C are first scaled according to the axes
CLim and then the result is treated as a colormap index. When C is
a 3-dimensional MxNx3 matrix, the elements in C(:,:,1) are
interpreted as red intensities, in C(:,:,2) as green intensities,
and in C(:,:,3) as blue intensities, and the CDataMapping property
of image is ignored. For matrices containing doubles, color
intensities are on the range [0.0, 1.0]. For uint8 and uint16
matrices, color intensities are on the range [0, 255].
IMAGE(C) places the center of element C(1,1) at (1,1) in the axes,
and the center of element (M,N) at (M,N) in the axes, and draws
each rectilinear patch as 1 unit in width and height. As a
result, the outer extent of the image occupies [0.5 N+0.5 0.5 M+0.5]
of the axes, and each pixel center of the image lies at integer
coordinates ranging between 1 and M or N.
IMAGE(X,Y,C), where X and Y are vectors, specifies the locations
of the pixel centers of C(1,1) and C(M,N). Element C(1,1) is
centered over (X(1), Y(1)), element C(M,N) is centered over
(X(end), Y(end)), and the pixel centers of the remaining elements
of C are spread out evenly between those two points, so that the
rectilinear patches are all of equal width and height.
IMAGE returns a handle to an IMAGE object.
C or the X,Y,C triple can be followed by property/value
pairs to specify additional properties of the image.
C or the X,Y,C triple can be omitted entirely, and all
properties specified using property/value pairs.
IMAGE(...,'Parent',AX) specifies AX as the parent axes for the
image object during creation.
When called with C or X,Y,C, IMAGE sets the axes limits to tightly
enclose the image, sets the axes YDir property to 'reverse', and
sets the axes View property to [0 90].
The image object will not render at axes View angles other than
[0 90]. To get a similar effect to rotating an image, use SURF
with texture mapping or PCOLOR.
Execute GET(H), where H is an image handle, to see a list of image
object properties and their current values. Execute SET(H) to see a
list of image object properties and legal property values.