//搜索腐蚀中心
static int SearchCentre(unsigned int *x,unsigned int *y,const TARGET_CONDI *Condition,const SEARCH_AREA *Area)
{
unsigned int SpaceX,SpaceY,i,j,k,FailCount=0;
COLOR_RGB Rgb;
COLOR_HSL Hsl;
SpaceX = Condition->WIDTH_MIN/3;
SpaceY = Condition->HIGHT_MIN/3;
for(i=Area->Y_Start;i<Area->Y_End;i+=SpaceY)
{
for(j=Area->X_Start;j<Area->X_End;j+=SpaceX)
{
FailCount=0;
for(k=0;k<SpaceX+SpaceY;k++)
{
if(k<SpaceX)
ReadColor(j+k,i+SpaceY/2,&Rgb);
else
ReadColor(j+SpaceX/2,i+(k-SpaceX),&Rgb);
RGBtoHSL(&Rgb,&Hsl);
if(!ColorMatch(&Hsl,Condition))
FailCount++;
if(FailCount>((SpaceX+SpaceY)>>ALLOW_FAIL_PER))
break;
}
if(k==SpaceX+SpaceY)
{
*x = j+SpaceX/2;
*y = i+SpaceY/2;
return 1;
}
}
}
return 0;
}
//从腐蚀中心向外腐蚀，得到新的腐蚀中心
static int Corrode(unsigned int oldx,unsigned int oldy,const TARGET_CONDI *Condition,RESULT *Resu)
{
unsigned int Xmin,Xmax,Ymin,Ymax,i,FailCount=0;
COLOR_RGB Rgb;
COLOR_HSL Hsl;
for(i=oldx;i>IMG_X;i--)
{
ReadColor(i,oldy,&Rgb);
RGBtoHSL(&Rgb,&Hsl);
if(!ColorMatch(&Hsl,Condition))
FailCount++;
if(FailCount>(((Condition->WIDTH_MIN+Condition->WIDTH_MAX)>>2)>>ALLOW_FAIL_PER))
break;
}
Xmin=i;
FailCount=0;
for(i=oldx;i<IMG_X+IMG_W;i++)
{
ReadColor(i,oldy,&Rgb);
RGBtoHSL(&Rgb,&Hsl);
if(!ColorMatch(&Hsl,Condition))
FailCount++;
if(FailCount>(((Condition->WIDTH_MIN+Condition->WIDTH_MAX)>>2)>>ALLOW_FAIL_PER))
break;
}
Xmax=i;
FailCount=0;
for(i=oldy;i>IMG_Y;i--)
{
ReadColor(oldx,i,&Rgb);
RGBtoHSL(&Rgb,&Hsl);
if(!ColorMatch(&Hsl,Condition))
FailCount++;
if(FailCount>(((Condition->HIGHT_MIN+Condition->HIGHT_MAX)>>2)>>ALLOW_FAIL_PER))
break;
}
Ymin=i;
FailCount=0;
for(i=oldy;i<IMG_Y+IMG_H;i++)
{
ReadColor(oldx,i,&Rgb);
RGBtoHSL(&Rgb,&Hsl);
if(!ColorMatch(&Hsl,Condition))
FailCount++;
if(FailCount>(((Condition->HIGHT_MIN+Condition->HIGHT_MAX)>>2)>>ALLOW_FAIL_PER))
break;
}
Ymax=i;
FailCount=0;
Resu->x = (Xmin+Xmax)/2;
Resu->y = (Ymin+Ymax)/2;
Resu->w = Xmax-Xmin;
Resu->h = Ymax-Ymin;
if(((Xmax-Xmin)>(Condition->WIDTH_MIN)) && ((Ymax-Ymin)>(Condition->HIGHT_MIN)) &&\
((Xmax-Xmin)<(Condition->WIDTH_MAX)) && ((Ymax-Ymin)<(Condition->HIGHT_MAX)) )
return 1;
else
return 0;
}
MagickExport MagickPassFail GradientImage(Image *image,
const PixelPacket *start_color,
const PixelPacket *stop_color)
{
const unsigned long
image_rows=image->rows,
image_columns=image->columns;
long
y;
unsigned long
row_count=0;
MagickPassFail
status=MagickPass;
/*
Determine (Hue, Saturation, Brightness) gradient.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
assert(start_color != (const PixelPacket *) NULL);
assert(stop_color != (const PixelPacket *) NULL);
/*
Generate gradient pixels.
*/
#if defined(HAVE_OPENMP)
# pragma omp parallel for shared(row_count, status)
#endif
for (y=0; y < (long) image->rows; y++)
{
MagickPassFail
thread_status;
register long
x;
register PixelPacket
*q;
#if defined(HAVE_OPENMP)
# pragma omp critical (GM_GradientImage)
#endif
thread_status=status;
if (thread_status == MagickFail)
continue;
q=SetImagePixelsEx(image,0,y,image->columns,1,&image->exception);
if (q == (PixelPacket *) NULL)
thread_status=MagickFail;
if (q != (PixelPacket *) NULL)
{
for (x=0; x < (long) image->columns; x++)
{
BlendCompositePixel(&q[x],start_color,stop_color,(double)
MaxRGB*(y*image_columns+x)/(image_columns*image_rows));
}
if (!SyncImagePixelsEx(image,&image->exception))
thread_status=MagickFail;
}
#if defined(HAVE_OPENMP)
# pragma omp critical (GM_GradientImage)
#endif
{
row_count++;
if (QuantumTick(row_count,image->rows))
if (!MagickMonitorFormatted(row_count,image->rows,&image->exception,
GradientImageText,image->filename))
thread_status=MagickFail;
if (thread_status == MagickFail)
status=MagickFail;
}
}
if (IsGray(*start_color) && IsGray(*stop_color))
image->is_grayscale=MagickTrue;
if (IsMonochrome(*start_color) && ColorMatch(start_color,stop_color))
image->is_monochrome=MagickTrue;
return(status);
}