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您说得对,转换过程可能有问题。让我们重新设计一个更可靠的CMYK分色加网方案:
#include <windows.h>
#include "ierrors.h"
#include "iapi.h"
#include <opencv2/opencv.hpp>
#include <vector>
#include <string>
class CCMYKHalftoneConverter {
private:
HMODULE m_hGsDll;
public:
CCMYKHalftoneConverter() : m_hGsDll(NULL) {}
~CCMYKHalftoneConverter() {
Cleanup();
}
bool Initialize(const CString& dllPath = _T("gsdll64.dll")) {
m_hGsDll = LoadLibrary(dllPath);
return (m_hGsDll != NULL);
}
// 使用系统调用执行Ghostscript命令
bool ExecuteGhostscriptCommand(const CString& command) {
STARTUPINFO si = {sizeof(si)};
PROCESS_INFORMATION pi;
BOOL success = CreateProcess(
NULL,
command.GetBuffer(),
NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi
);
if (success) {
WaitForSingleObject(pi.hProcess, 30000); // 30秒超时
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
return true;
}
return false;
}
// CMYK分色加网 - 分别生成每个通道
bool ConvertCMYKHalftone(const CString& inputFile,
std::vector<cv::Mat>& outputPlates,
int dpi = 300,
int width = 0,
int height = 0,
int frequency = 150) {
if (!m_hGsDll) return false;
outputPlates.clear();
// CMYK通道名称和角度
struct ChannelInfo {
CString name;
double angle;
CString outputName;
};
ChannelInfo channels = {
{_T("Cyan"), 15.0, _T("temp_cyan.tif")},
{_T("Magenta"), 75.0, _T("temp_magenta.tif")},
{_T("Yellow"), 0.0, _T("temp_yellow.tif")},
{_T("Black"), 45.0, _T("temp_black.tif")}
};
for (int i = 0; i < 4; i++) {
CString command;
// 构建Ghostscript命令
command.Format(
_T("gswin64c -dNOPAUSE -dBATCH -dSAFER ")
_T("-sDEVICE=tiffg4 -r%d "), dpi
);
// 添加尺寸参数
if (width > 0 && height > 0) {
CString size;
size.Format(_T("-g%dx%d "), width, height);
command += size;
}
// 添加分色和半色调参数
CString colorParams;
colorParams.Format(
_T("-c \"<< /ProcessColorModel /DeviceCMYK ")
_T("/SeparationColorNames [()] ")
_T("/SeparationOrder [] ")
_T("/HalftoneType 1 ")
_T("/Frequency %d ")
_T("/Angle %g ")
_T(">> setpagedevice\" "),
frequency, channels.angle
);
command += colorParams;
// 添加输出和输入文件
CString files;
files.Format(_T("-sOutputFile=\"%s\" \"%s\""),
channels.outputName, inputFile);
command += files;
// 执行转换
if (ExecuteGhostscriptCommand(command)) {
// 读取生成的TIFF文件
cv::Mat plate = cv::imread(CStringA(channels.outputName).GetString(), cv::IMREAD_GRAYSCALE);
if (!plate.empty()) {
outputPlates.push_back(plate);
// 保存验证文件
CString verifyName;
verifyName.Format(_T("verify_%s.tif"), channels.name);
cv::imwrite(CStringA(verifyName).GetString(), plate);
}
// 删除临时文件
DeleteFile(channels.outputName);
}
}
return (outputPlates.size() == 4);
}
// 简化的CMYK转换 - 使用分离设备
bool ConvertCMYKSimple(const CString& inputFile,
std::vector<cv::Mat>& outputPlates,
int dpi = 300) {
if (!m_hGsDll) return false;
outputPlates.clear();
// 使用tiffsep分离设备
CString command;
command.Format(
_T("gswin64c -dNOPAUSE -dBATCH -dSAFER ")
_T("-sDEVICE=tiffsep -r%d ")
_T("-sOutputFile=\"temp_sep_%%d.tif\" ")
_T("\"%s\""),
dpi, inputFile
);
if (ExecuteGhostscriptCommand(command)) {
// 读取分离的通道文件
CString channelFiles = {
_T("temp_sep_1.tif"), // Cyan
_T("temp_sep_2.tif"), // Magenta
_T("temp_sep_3.tif"), // Yellow
_T("temp_sep_4.tif") // Black
};
for (int i = 0; i < 4; i++) {
cv::Mat plate = cv::imread(CStringA(channelFiles).GetString(), cv::IMREAD_GRAYSCALE);
if (!plate.empty()) {
// 转换为二值图像
cv::Mat binary;
cv::threshold(plate, binary, 128, 255, cv::THRESH_BINARY);
outputPlates.push_back(binary);
// 保存验证
CString verifyName;
verifyName.Format(_T("simple_plate_%d.tif"), i);
cv::imwrite(CStringA(verifyName).GetString(), binary);
}
// 删除临时文件
DeleteFile(channelFiles);
}
}
return (outputPlates.size() == 4);
}
// 专色通道转换
cv::Mat ConvertSpotColor(const CString& inputFile,
const CString& spotColorName,
int dpi = 300) {
if (!m_hGsDll) return cv::Mat();
CString tempFile = _T("temp_spot.tif");
CString command;
command.Format(
_T("gswin64c -dNOPAUSE -dBATCH -dSAFER ")
_T("-sDEVICE=tiffg4 -r%d ")
_T("-sOutputFile=\"%s\" ")
_T("\"%s\""),
dpi, tempFile, inputFile
);
cv::Mat result;
if (ExecuteGhostscriptCommand(command)) {
result = cv::imread(CStringA(tempFile).GetString(), cv::IMREAD_GRAYSCALE);
if (!result.empty()) {
cv::imwrite("spot_result.tif", result);
}
DeleteFile(tempFile);
}
return result;
}
void Cleanup() {
if (m_hGsDll) {
FreeLibrary(m_hGsDll);
m_hGsDll = NULL;
}
}
};
// 调试函数:检查Ghostscript是否可用
bool TestGhostscriptInstallation() {
STARTUPINFO si = {sizeof(si)};
PROCESS_INFORMATION pi;
BOOL success = CreateProcess(
NULL,
_T("gswin64c -h"),
NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi
);
if (success) {
WaitForSingleObject(pi.hProcess, 5000);
DWORD exitCode;
GetExitCodeProcess(pi.hProcess, &exitCode);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
return (exitCode == 0);
}
return false;
}
// 使用示例
void TestCMYKConversion() {
// 首先测试Ghostscript是否可用
if (!TestGhostscriptInstallation()) {
MessageBox(NULL, _T("Ghostscript未安装或未在PATH中"), _T("错误"), MB_OK);
return;
}
CCMYKHalftoneConverter converter;
if (converter.Initialize()) {
std::vector<cv::Mat> plates;
// 方法1:简化分离
if (converter.ConvertCMYKSimple(_T("test.pdf"), plates, 300)) {
MessageBox(NULL, _T("CMYK分离成功!"), _T("成功"), MB_OK);
}
else {
// 方法2:详细分离
if (converter.ConvertCMYKHalftone(_T("test.pdf"), plates, 300)) {
MessageBox(NULL, _T("CMYK加网分离成功!"), _T("成功"), MB_OK);
}
else {
MessageBox(NULL, _T("所有转换方法都失败了"), _T("错误"), MB_OK);
}
}
}
}
// 验证图像文件
bool VerifyOutputFiles() {
CString files = {
_T("simple_plate_0.tif"), _T("simple_plate_1.tif"),
_T("simple_plate_2.tif"), _T("simple_plate_3.tif"),
_T("verify_Cyan.tif"), _T("verify_Magenta.tif"),
_T("verify_Yellow.tif"), _T("verify_Black.tif"),
_T("spot_result.tif")
};
for (int i = 0; i < 9; i++) {
if (GetFileAttributes(files) != INVALID_FILE_ATTRIBUTES) {
return true;
}
}
return false;
}
关键改进:
1. 使用系统调用而不是DLL直接调用,更稳定
2. 添加了Ghostscript安装检测
3. 提供了两种分离方法:简化分离和详细加网分离
4. 每个步骤都生成验证文件
5. 添加了错误处理和超时机制
使用前请确保:
1. Ghostscript已安装且gswin64c在系统PATH中
2. 输入文件路径正确
3. 有足够的磁盘空间存储临时文件
如果仍然失败,请检查:
1. Ghostscript是否正确安装:在cmd中运行 gswin64c -h
2. 输入文件是否存在且可读
3. 输出目录是否有写入权限
这样应该能正确生成CMYK分色加网图像了。
以上回复来自 FishC AI 小助理,如未能正确解答您的问题,请继续追问。 |
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