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comparison PalanthirServer/DicomIntegerPixelAccessor.cpp @ 53:293038baf8f1

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access to multi-frame images
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 10 Sep 2012 15:17:02 +0200
parents a15e90e5d6fc
children
comparison
equal deleted inserted replaced
52:e0cac5540668 53:293038baf8f1
55 catch (boost::bad_lexical_cast) 55 catch (boost::bad_lexical_cast)
56 { 56 {
57 throw PalanthirException(ErrorCode_NotImplemented); 57 throw PalanthirException(ErrorCode_NotImplemented);
58 } 58 }
59 59
60 if (bitsAllocated != 8 && bitsAllocated != 16 && 60 frame_ = 0;
61 bitsAllocated != 24 && bitsAllocated != 32) 61 try
62 {
63 numberOfFrames_ = boost::lexical_cast<unsigned int>(FromDcmtkBridge::GetValue(values, "NumberOfFrames").AsString());
64 }
65 catch (PalanthirException)
66 {
67 // If the tag "NumberOfFrames" is absent, assume there is a single frame
68 numberOfFrames_ = 1;
69 }
70 catch (boost::bad_lexical_cast)
71 {
72 throw PalanthirException(ErrorCode_NotImplemented);
73 }
74
75 if ((bitsAllocated != 8 && bitsAllocated != 16 &&
76 bitsAllocated != 24 && bitsAllocated != 32) ||
77 numberOfFrames_ == 0)
62 { 78 {
63 throw PalanthirException(ErrorCode_NotImplemented); 79 throw PalanthirException(ErrorCode_NotImplemented);
64 } 80 }
65 81
66 if (bitsAllocated > 32 || 82 if (bitsAllocated > 32 ||
67 bitsStored >= 32) 83 bitsStored >= 32)
68 { 84 {
69 // Not available, as the accessor internally uses int32_t values 85 // Not available, as the accessor internally uses int32_t values
70 throw PalanthirException(ErrorCode_NotImplemented); 86 throw PalanthirException(ErrorCode_NotImplemented);
71 } 87 }
72 88
73 if (samplesPerPixel_ != 1) 89 if (samplesPerPixel_ != 1)
74 { 90 {
75 throw PalanthirException(ErrorCode_NotImplemented); 91 throw PalanthirException(ErrorCode_NotImplemented);
76 } 92 }
77 93
78 if (width_ * height_ * bitsAllocated / 8 != size) 94 if (width_ * height_ * bitsAllocated / 8 * numberOfFrames_ != size)
79 { 95 {
80 throw PalanthirException(ErrorCode_NotImplemented); 96 throw PalanthirException(ErrorCode_NotImplemented);
81 } 97 }
82 98
83 /*printf("%d %d %d %d %d %d %d\n", width_, height_, samplesPerPixel_, bitsAllocated, 99 /*printf("%d %d %d %d %d %d %d %d\n", width_, height_, samplesPerPixel_, bitsAllocated,
84 bitsStored, highBit, pixelRepresentation);*/ 100 bitsStored, highBit, pixelRepresentation, numberOfFrames_);*/
85 101
86 bytesPerPixel_ = bitsAllocated / 8; 102 bytesPerPixel_ = bitsAllocated / 8;
87 shift_ = highBit + 1 - bitsStored; 103 shift_ = highBit + 1 - bitsStored;
88 104
89 if (pixelRepresentation) 105 if (pixelRepresentation)
94 else 110 else
95 { 111 {
96 mask_ = (1 << bitsStored) - 1; 112 mask_ = (1 << bitsStored) - 1;
97 signMask_ = 0; 113 signMask_ = 0;
98 } 114 }
115
116 rowOffset_ = width_ * bytesPerPixel_;
117 frameOffset_ = height_ * width_ * bytesPerPixel_;
99 } 118 }
100 119
101 120
102 void DicomIntegerPixelAccessor::GetExtremeValues(int32_t& min, 121 void DicomIntegerPixelAccessor::GetExtremeValues(int32_t& min,
103 int32_t& max) const 122 int32_t& max) const
127 146
128 int32_t DicomIntegerPixelAccessor::GetValue(unsigned int x, unsigned int y) const 147 int32_t DicomIntegerPixelAccessor::GetValue(unsigned int x, unsigned int y) const
129 { 148 {
130 assert(x < width_ && y < height_); 149 assert(x < width_ && y < height_);
131 150
132 const uint8_t* pixel = reinterpret_cast<const uint8_t*>(pixelData_) + (y * width_ + x) * bytesPerPixel_; 151 const uint8_t* pixel = reinterpret_cast<const uint8_t*>(pixelData_) +
152 y * rowOffset_ + x * bytesPerPixel_ + frame_ * frameOffset_;
133 153
134 int32_t v; 154 int32_t v;
135 v = pixel[0]; 155 v = pixel[0];
136 if (bytesPerPixel_ >= 2) 156 if (bytesPerPixel_ >= 2)
137 v = v + (static_cast<int32_t>(pixel[1]) << 8); 157 v = v + (static_cast<int32_t>(pixel[1]) << 8);
149 v = 0; 169 v = 0;
150 } 170 }
151 171
152 return v; 172 return v;
153 } 173 }
174
175
176 void DicomIntegerPixelAccessor::SetCurrentFrame(unsigned int frame)
177 {
178 if (frame >= numberOfFrames_)
179 {
180 throw PalanthirException(ErrorCode_ParameterOutOfRange);
181 }
182
183 frame_ = frame;
184 }
185
154 } 186 }