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https://github.com/tesseract-ocr/tesseract.git
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81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
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#include <string>
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#include "leptonica/include/allheaders.h"
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#include "tesseract/api/baseapi.h"
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#include "tesseract/ccutil/helpers.h"
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namespace {
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// The fixture for testing Tesseract.
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class PageSegModeTest : public testing::Test {
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protected:
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string TestDataNameToPath(const string& name) {
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return file::JoinPath(FLAGS_test_srcdir, "testdata/" + name);
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}
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string TessdataPath() {
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return file::JoinPath(FLAGS_test_srcdir, "tessdata");
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}
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PageSegModeTest() { src_pix_ = nullptr; }
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~PageSegModeTest() { pixDestroy(&src_pix_); }
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void SetImage(const char* filename) {
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pixDestroy(&src_pix_);
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src_pix_ = pixRead(TestDataNameToPath(filename).c_str());
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api_.Init(TessdataPath().c_str(), "eng", tesseract::OEM_TESSERACT_ONLY);
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api_.SetImage(src_pix_);
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}
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// Tests that the given rectangle produces exactly the given text in the
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// given segmentation mode (after chopping off the last 2 newlines.)
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void VerifyRectText(tesseract::PageSegMode mode, const char* str, int left,
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int top, int width, int height) {
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api_.SetPageSegMode(mode);
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api_.SetRectangle(left, top, width, height);
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char* result = api_.GetUTF8Text();
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chomp_string(result);
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chomp_string(result);
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EXPECT_STREQ(str, result);
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delete[] result;
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}
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// Tests that the given rectangle does NOT produce the given text in the
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// given segmentation mode.
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void NotRectText(tesseract::PageSegMode mode, const char* str, int left,
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int top, int width, int height) {
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api_.SetPageSegMode(mode);
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api_.SetRectangle(left, top, width, height);
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char* result = api_.GetUTF8Text();
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EXPECT_STRNE(str, result);
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delete[] result;
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}
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Pix* src_pix_;
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string ocr_text_;
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tesseract::TessBaseAPI api_;
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};
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// Tests the single-word segmentation mode, and that it performs correctly
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// and differently to line and block mode.
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TEST_F(PageSegModeTest, WordTest) {
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SetImage("segmodeimg.tif");
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// Test various rectangles around the inverse page number.
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VerifyRectText(tesseract::PSM_SINGLE_WORD, "183", 1482, 146, 72, 44);
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VerifyRectText(tesseract::PSM_SINGLE_WORD, "183", 1474, 134, 82, 72);
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VerifyRectText(tesseract::PSM_SINGLE_WORD, "183", 1459, 116, 118, 112);
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// Test a random pair of words as a line
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VerifyRectText(tesseract::PSM_SINGLE_LINE, "What should", 1119, 621, 245, 54);
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// Test a random pair of words as a word
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VerifyRectText(tesseract::PSM_SINGLE_WORD, "Whatshould", 1119, 621, 245, 54);
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// Test single block mode.
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VerifyRectText(tesseract::PSM_SINGLE_BLOCK, "both the\nfrom the", 181, 676,
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179, 104);
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// But doesn't work in line or word mode.
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NotRectText(tesseract::PSM_SINGLE_LINE, "both the\nfrom the", 181, 676, 179,
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104);
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NotRectText(tesseract::PSM_SINGLE_WORD, "both the\nfrom the", 181, 676, 179,
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104);
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}
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} // namespace
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