Makefile for batch OCR

Makefile

CONVERT = convert
IMFLAGS = -verbose -colorspace gray -median 3x3 -resize 300% -blur 10

TESSERACT = tesseract

RM = rm

SRCS = $(wildcard *.pbm)
INTERMEDIATES = ${SRCS:.pbm=.tiff}
RESULTS = ${SRCS:.pbm=.txt}

.PHONY: all
all: $(RESULTS) 
.PRECIOUS: $(INTERMEDIATES)

clean:
	$(RM) -f $(INTERMEDIATES) $(RESULTS)

%.tiff: %.pbm
	$(CONVERT) $(IMFLAGS) $< $@

%.txt: %.tiff
	$(TESSERACT) $< $(basename $@) -l deu