draw_regionT_draw_regionDrawRegionDrawRegiondraw_region (算子)

名称

draw_regionT_draw_regionDrawRegionDrawRegiondraw_region — 交互式绘制封闭区域。

签名

draw_region( : Region : WindowHandle : )

描述

draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region produces an image. The region of that image spans exactly the image region entered interactively by mouse clicks (gray values remain undefined). Painting happens in the output window while keeping the left mouse button pressed. The left mouse button even operates by clicking in the output window; through this a line between the previous clicked points is drawn. Clicking the right mouse button terminates input and closes the outline. Subsequently the image is “filled up”. Also it contains the whole image area enclosed by the mouse.

Painting uses that color which has been set by set_colorset_colorSetColorSetColorSetColorset_color, set_rgbset_rgbSetRgbSetRgbSetRgbset_rgb, etc. .

Pressing the right mouse button terminates the procedure.

注意

The output object's gray values are not defined.

If used in a buffer window, mouse events have to be supplied by the application, while the draw operator must be run in another thread.

执行信息

多线程类型：可重入（与非独占算子并行运行）。
多线程作用域：全局（可从任何线程调用）。
未采用并行化处理。

参数

RegionRegionRegionRegionregionregion (输出对象) region → object

Interactive created region.

WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (输入控制) window → (handle)

窗口句柄。

示例（HDevelop）

read_image(Image,'fabrik')
dev_display (Image)
draw_region(Region,WindowHandle)
reduce_domain(Image,Region,ImageReduced)
invert_image (ImageReduced, ImageInvert)
dev_display (ImageInvert)

示例（C）

read_image(&Image,"fabrik");
disp_image(Image,WindowHandle);
draw_region(&Region,WindowHandle);
reduce_domain(Image,Region,&New);
regiongrowing(New,&Segmente,5,5,6,50);
set_colored(WindowHandle,12);
disp_region(Segmente,WindowHandle);

示例（HDevelop）

read_image(Image,'fabrik')
dev_display (Image)
draw_region(Region,WindowHandle)
reduce_domain(Image,Region,ImageReduced)
invert_image (ImageReduced, ImageInvert)
dev_display (ImageInvert)

示例（HDevelop）

read_image(Image,'fabrik')
dev_display (Image)
draw_region(Region,WindowHandle)
reduce_domain(Image,Region,ImageReduced)
invert_image (ImageReduced, ImageInvert)
dev_display (ImageInvert)

示例（HDevelop）

read_image(Image,'fabrik')
dev_display (Image)
draw_region(Region,WindowHandle)
reduce_domain(Image,Region,ImageReduced)
invert_image (ImageReduced, ImageInvert)
dev_display (ImageInvert)

结果

If the window is valid, draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region 返回 2 ( H_MSG_TRUE )。如有必要，则抛出异常。

可能的前趋

open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window

可能的后继

reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain, disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region, set_coloredset_coloredSetColoredSetColoredSetColoredset_colored, set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidthset_line_width, set_drawset_drawSetDrawSetDrawSetDrawset_draw

替代

draw_circledraw_circleDrawCircleDrawCircleDrawCircledraw_circle, draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipsedraw_ellipse, draw_rectangle1draw_rectangle1DrawRectangle1DrawRectangle1DrawRectangle1draw_rectangle1, draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2draw_rectangle2

另见

draw_polygondraw_polygonDrawPolygonDrawPolygonDrawPolygondraw_polygon, reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain, fill_upfill_upFillUpFillUpFillUpfill_up, set_colorset_colorSetColorSetColorSetColorset_color

模块

基础

算子